From owner-public@setileague.org Sat Apr 1 15:58:14 2006 X-Spam-Checker-Version: SpamAssassin 3.1.0 (2005-09-13) on Sentry.net X-Spam-Level: X-Spam-Status: No, score=-2.6 required=5.0 tests=AWL,BAYES_00, MSGID_FROM_MTA_HEADER autolearn=unavailable version=3.1.0 Received: from seti1.setileague.org (seti1.setileague.org [204.176.91.10]) by Sentry.net (8.13.6/8.13.3) with ESMTP id k31NwDCh026262 for ; Sat, 1 Apr 2006 15:58:14 -0800 Received: (from majordom@localhost) by seti1.setileague.org (8.9.3 (PHNE_24419+JAGae58098)/8.9.3) id SAA09424 for public-list; Sat, 1 Apr 2006 18:54:54 -0500 (EST) X-Authentication-Warning: seti1.setileague.org: majordom set sender to owner-public@seti1.setileague.org using -f Received: from hotmail.com (bay114-f4.bay114.hotmail.com [65.54.169.14]) by seti1.setileague.org (8.9.3 (PHNE_24419+JAGae58098)/8.9.3) with ESMTP id SAA09420; Sat, 1 Apr 2006 18:54:52 -0500 (EST) Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Sat, 1 Apr 2006 15:54:20 -0800 Message-ID: Received: from 65.54.169.200 by by114fd.bay114.hotmail.msn.com with HTTP; Sat, 01 Apr 2006 23:54:18 GMT X-Originating-IP: [141.149.239.251] X-Originating-Email: [ljk4@msn.com] X-Sender: ljk4@msn.com From: "LARRY KLAES" To: public@setileague.org Subject: SETI public: FW: Latest News from the Astrobiology Magazine Date: Sat, 01 Apr 2006 18:54:18 -0500 Mime-Version: 1.0 Content-Type: text/plain; format=flowed X-OriginalArrivalTime: 01 Apr 2006 23:54:20.0820 (UTC) FILETIME=[9855BD40:01C655E7] Sender: owner-public@setileague.org Precedence: bulk >From: "Astrobiology Magazine" >To: ljk4@msn.com >Subject: Latest News from the Astrobiology Magazine >Date: Sat, 1 Apr 2006 02:33:30 -0800 > >Blonde Europa >http://www.astrobio.net/news/article1913.html > >Some may be surprised to learn that bleach-blondes and the enabler of life >elsewhere in our solar system have something in common. And, no, it's not >intelligence. It is, in fact, hydrogen peroxide. > >Going Deep >http://www.astrobio.net/news/article1912.html > >The microbes that inhabit deep-sea hydrothermal vent environments may be >relics of the earliest life on Earth. Yet very little is known about these >organisms, because it is so technically challenging to study them. Chris >Scholin of the Monterey Bay Aquarium Research Institute plans to take on >that challenge, in a project that may some day help scientists search for >life on Mars or Europa. > >Whalesong Syntax >http://www.astrobio.net/news/article1911.html > >The songs of the humpback whale are among the most complex in the animal >kingdom. Researchers have now mathematically confirmed that whales have >their own syntax that uses sound units to build phrases that can be >combined to form songs that last for hours. > >The Oxygen Imperative >http://www.astrobio.net/news/article1910.html > >It's common knowledge that humans and other animals couldn't survive >without oxygen. But scientists are now learning a good deal more about the >extent of our evolutionary debt to a substance that was once a deadly >poison. > >Saturday, April 01 > >------------------------ >For more astrobiology news, visit http://www.astrobio.net > >To unsubscribe, send subject UNSUBSCRIBE to astronaut@astrobio.net > > > > From owner-public@setileague.org Sat Apr 1 18:17:00 2006 X-Spam-Checker-Version: SpamAssassin 3.1.0 (2005-09-13) on Sentry.net X-Spam-Level: X-Spam-Status: No, score=-2.6 required=5.0 tests=AWL,BAYES_00, MSGID_FROM_MTA_HEADER autolearn=unavailable version=3.1.0 Received: from seti1.setileague.org (seti1.setileague.org [204.176.91.10]) by Sentry.net (8.13.6/8.13.3) with ESMTP id k322GxjJ028228 for ; Sat, 1 Apr 2006 18:16:59 -0800 Received: (from majordom@localhost) by seti1.setileague.org (8.9.3 (PHNE_24419+JAGae58098)/8.9.3) id VAA12784 for public-list; Sat, 1 Apr 2006 21:14:31 -0500 (EST) X-Authentication-Warning: seti1.setileague.org: majordom set sender to owner-public@seti1.setileague.org using -f Received: from hotmail.com (bay114-f18.bay114.hotmail.com [65.54.169.28]) by seti1.setileague.org (8.9.3 (PHNE_24419+JAGae58098)/8.9.3) with ESMTP id VAA12780; Sat, 1 Apr 2006 21:14:29 -0500 (EST) Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Sat, 1 Apr 2006 18:13:54 -0800 Message-ID: Received: from 65.54.169.200 by by114fd.bay114.hotmail.msn.com with HTTP; Sun, 02 Apr 2006 02:13:49 GMT X-Originating-IP: [70.16.49.209] X-Originating-Email: [ljk4@msn.com] X-Sender: ljk4@msn.com From: "LARRY KLAES" To: public@setileague.org Subject: SETI public: Issues in the Philosophy of Cosmology Date: Sat, 01 Apr 2006 21:13:49 -0500 Mime-Version: 1.0 Content-Type: text/plain; format=flowed X-OriginalArrivalTime: 02 Apr 2006 02:13:54.0842 (UTC) FILETIME=[17A417A0:01C655FB] Sender: owner-public@setileague.org Precedence: bulk Astrophysics, abstract astro-ph/0602280 From: George F. R. Ellis [view email] Date (v1): Mon, 13 Feb 2006 10:47:21 GMT (109kb) Date (revised v2): Wed, 29 Mar 2006 14:23:05 GMT (109kb) Issues in the Philosophy of Cosmology Authors: George F. R. Ellis Comments: To appear in the Handbook in Philosophy of Physics, Ed J Butterfield and J Earman (Elsevier, 2006). Small imporvements plus crucial change in Thesis B2 After a survey of the present state of cosmological theory and observations, this article discusses a series of major themes underlying the relation of philosophy to cosmology. These are: A: The uniqueness of the universe; B: The large scale of the universe in space and time; C: The unbound energies in the early universe; D: Explaining the universe -- the question of origins; E: The universe as the background for existence; F: The explicit philosophical basis; G: The Anthropic question: fine tuning for life; H: The possible existence of multiverses; I: The natures of existence. Each of these themes is explored and related to a series of Theses that set out the major issues confronting cosmology in relation to philosophy. http://arxiv.org/abs/astro-ph/0602280 From owner-public@setileague.org Mon Apr 3 07:27:00 2006 X-Spam-Checker-Version: SpamAssassin 3.1.0 (2005-09-13) on Sentry.net X-Spam-Level: X-Spam-Status: No, score=-2.6 required=5.0 tests=AWL,BAYES_00, MSGID_FROM_MTA_HEADER autolearn=unavailable version=3.1.0 Received: from seti1.setileague.org (seti1.setileague.org [204.176.91.10]) by Sentry.net (8.13.6/8.13.3) with ESMTP id k33EQxV3004799 for ; Mon, 3 Apr 2006 07:26:59 -0700 Received: (from majordom@localhost) by seti1.setileague.org (8.9.3 (PHNE_24419+JAGae58098)/8.9.3) id KAA02676 for public-list; Mon, 3 Apr 2006 10:16:44 -0400 (EDT) X-Authentication-Warning: seti1.setileague.org: majordom set sender to owner-public@seti1.setileague.org using -f Received: from hotmail.com (bay114-f16.bay114.hotmail.com [65.54.169.26]) by seti1.setileague.org (8.9.3 (PHNE_24419+JAGae58098)/8.9.3) with ESMTP id KAA02672; Mon, 3 Apr 2006 10:16:42 -0400 (EDT) Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Mon, 3 Apr 2006 07:16:11 -0700 Message-ID: Received: from 65.54.169.200 by by114fd.bay114.hotmail.msn.com with HTTP; Mon, 03 Apr 2006 14:16:08 GMT X-Originating-IP: [24.39.94.195] X-Originating-Email: [ljk4@msn.com] X-Sender: ljk4@msn.com From: "LARRY KLAES" To: public@setileague.org Subject: SETI public: Radio "amateurs" detect Voyager 1 signal Date: Mon, 03 Apr 2006 10:16:08 -0400 Mime-Version: 1.0 Content-Type: text/plain; format=flowed X-OriginalArrivalTime: 03 Apr 2006 14:16:11.0301 (UTC) FILETIME=[2898B550:01C65729] Sender: owner-public@setileague.org Precedence: bulk http://www.southgatearc.org/news/april2006/voyager1.htm VOYAGER 1 received by AMSAT-DL group Space probe VOYAGER 1 successfully received On March 31st, 2006 an AMSAT-DL / IUZ team received the American space probe VOYAGER 1 with the 20m antenna in Bochum. The distance was 14.7 billion km. This is a new record for AMSAT-DL and IUZ Bochum. The received signal was clearly identified through means of doppler shift and position in the sky. The receive frequency was exactly measured and compared with the information provided by NASA. This distance equals approximately 98 times the distance between Earth and Sun. VOYAGER 1 is the most distant object ever built by mankind. This again proves the superior performance of the Bochum antenna. Most probably this is the first time Voyager 1 has been received by radio amateurs. VOYAGER 1 was launched on 5. September 1977 by NASA. It transmitted the first close-up pictures of Jupiter and Saturn. In 2004 VOYAGER 1 passed the Termination Shock Region, where the solar wind mixes with interstellar gas. VOYAGER 1 today is still active, measuring the interstellar magnetic field. The following radio amateurs were involved: Freddy de Guchteneire, ON6UG James Miller, G3RUH Hartmut Paesler, DL1YDD Achim Vollhardt, DH2VA/HB9DUN Special thanks to Thilo Elsner, DJ5YM of the IUZ Bochum, Roger Ludwig of Jet Propulsion Laboratory (JPL), Pasadena USA and the Deep Space Network Tracking Station in Madrid, Spain for their cooperation. For more information please visit: http://voyager.jpl.nasa.gov http://www.amsat-dl.org/cms , under "News" From owner-public@setileague.org Mon Apr 3 19:46:39 2006 X-Spam-Checker-Version: SpamAssassin 3.1.0 (2005-09-13) on Sentry.net X-Spam-Level: X-Spam-Status: No, score=-2.6 required=5.0 tests=AWL,BAYES_00, MSGID_FROM_MTA_HEADER autolearn=unavailable version=3.1.0 Received: from seti1.setileague.org (seti1.setileague.org [204.176.91.10]) by Sentry.net (8.13.6/8.13.3) with ESMTP id k342kcQL016339 for ; Mon, 3 Apr 2006 19:46:38 -0700 Received: (from majordom@localhost) by seti1.setileague.org (8.9.3 (PHNE_24419+JAGae58098)/8.9.3) id WAA20061 for public-list; Mon, 3 Apr 2006 22:42:31 -0400 (EDT) X-Authentication-Warning: seti1.setileague.org: majordom set sender to owner-public@seti1.setileague.org using -f Received: from hotmail.com (bay114-f3.bay114.hotmail.com [65.54.169.13]) by seti1.setileague.org (8.9.3 (PHNE_24419+JAGae58098)/8.9.3) with ESMTP id WAA20057; Mon, 3 Apr 2006 22:42:29 -0400 (EDT) Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Mon, 3 Apr 2006 19:41:57 -0700 Message-ID: Received: from 65.54.169.200 by by114fd.bay114.hotmail.msn.com with HTTP; Tue, 04 Apr 2006 02:41:55 GMT X-Originating-IP: [141.149.216.191] X-Originating-Email: [ljk4@msn.com] X-Sender: ljk4@msn.com From: "LARRY KLAES" To: public@setileague.org Subject: SETI public: FW: Solar Activity Increases Date: Mon, 03 Apr 2006 22:41:55 -0400 Mime-Version: 1.0 Content-Type: text/plain; format=flowed X-OriginalArrivalTime: 04 Apr 2006 02:41:57.0950 (UTC) FILETIME=[57AD7DE0:01C65791] Sender: owner-public@setileague.org Precedence: bulk >From: SpaceWeather.com >To: SpaceWeather.com >Subject: Solar Activity Increases >Date: Mon, 03 Apr 2006 11:13:43 -0600 > >Space Weather News for April 3, 2006 >http://spaceweather.com > >Solar activity is suddenly increasing. The biggest sunspots of the year >are crossing the solar disk; one group is longer than 10 Earth diameters >and poses a threat for solar flares. Meanwhile, astronomers are monitoring >a large and delightfully complex prominence dancing long the sun's limb. >Whether all this will translate into magnetic storms and auroras remains to >be seen. Please visit http://spaceweather.com for pictures and updates. > >Would you like to know about solar flares the instant they erupt? Sign up >for SpaceWeather PHONE: http://spaceweatherphone.com > From owner-public@setileague.org Mon Apr 3 19:48:01 2006 X-Spam-Checker-Version: SpamAssassin 3.1.0 (2005-09-13) on Sentry.net X-Spam-Level: X-Spam-Status: No, score=-2.6 required=5.0 tests=AWL,BAYES_00, MSGID_FROM_MTA_HEADER autolearn=unavailable version=3.1.0 Received: from seti1.setileague.org (seti1.setileague.org [204.176.91.10]) by Sentry.net (8.13.6/8.13.3) with ESMTP id k342m0KW016420 for ; Mon, 3 Apr 2006 19:48:00 -0700 Received: (from majordom@localhost) by seti1.setileague.org (8.9.3 (PHNE_24419+JAGae58098)/8.9.3) id WAA20149 for public-list; Mon, 3 Apr 2006 22:45:22 -0400 (EDT) X-Authentication-Warning: seti1.setileague.org: majordom set sender to owner-public@seti1.setileague.org using -f Received: from hotmail.com (bay114-f13.bay114.hotmail.com [65.54.169.23]) by seti1.setileague.org (8.9.3 (PHNE_24419+JAGae58098)/8.9.3) with ESMTP id WAA20145; Mon, 3 Apr 2006 22:45:20 -0400 (EDT) Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Mon, 3 Apr 2006 19:44:48 -0700 Message-ID: Received: from 65.54.169.200 by by114fd.bay114.hotmail.msn.com with HTTP; Tue, 04 Apr 2006 02:44:44 GMT X-Originating-IP: [141.149.216.191] X-Originating-Email: [ljk4@msn.com] X-Sender: ljk4@msn.com From: "LARRY KLAES" To: public@setileague.org Subject: SETI public: Two Suns in The Sky: Stellar Multiplicity in Exoplanet Systems Date: Mon, 03 Apr 2006 22:44:44 -0400 Mime-Version: 1.0 Content-Type: text/plain; format=flowed X-OriginalArrivalTime: 04 Apr 2006 02:44:48.0385 (UTC) FILETIME=[BD43CF10:01C65791] Sender: owner-public@setileague.org Precedence: bulk Astrophysics, abstract astro-ph/0603836 From: Deepak Raghavan [view email] Date: Thu, 30 Mar 2006 21:22:56 GMT (223kb) Two Suns in The Sky: Stellar Multiplicity in Exoplanet Systems Authors: Deepak Raghavan, Todd J. Henry, Brian D. Mason, John P. Subasavage, Wei-Chun Jao, Thom D. Beaulieu, Nigel C. Hambly Comments: 52 pages, 7 figures, Accepted for publication in ApJ We present results of a reconnaissance for stellar companions to all 131 radial-velocity-detected candidate extrasolar planetary systems known as of July 1, 2005. CPM companions were investigated using the multi-epoch DSS images, and confirmed by matching the trigonometric parallax distances of the primaries to companion distances estimated photometrically. We also attempt to confirm or refute companions listed in the Washington Double Star Catalog, the Catalogs of Nearby Stars, in Hipparcos results, and in Duquennoy & Mayor (1991). Our findings indicate that a lower limit of 30 (23%) of the 131 exoplanet systems have stellar companions. We report new stellar companions to HD 38529 and HD 188015, and a new candidate companion to HD 169830. We confirm many previously reported stellar companions, including six stars in five systems that are recognized for the first time as companions to exoplanet hosts. We have found evidence that 20 entries in the Washington Double Star Catalog are not gravitationally bound companions. At least three, and possibly five, of the exoplanet systems reside in triple star systems. Three exoplanet systems have potentially close-in stellar companions ~ 20 AU away from the primary. Finally, two of the exoplanet systems contain white dwarf companions. This comprehensive assessment of exoplanet systems indicates that solar systems are found in a variety of stellar multiplicity environments - singles, binaries, and triples; and that planets survive the post-main-sequence evolution of companion stars. http://arxiv.org/abs/astro-ph/0603836 Astrophysics, abstract astro-ph/0510109 From: Krzysztof Gozdziewski [view email] Date (v1): Wed, 5 Oct 2005 04:34:23 GMT (562kb) Date (revised v2): Fri, 31 Mar 2006 03:13:12 GMT (557kb) Trojan pairs in the HD 128311 and HD 82943 planetary systems? Authors: Krzysztof Gozdziewski, Maciej Konacki Comments: 18 pages (total), 17 figures in low resolution format suitable for arXiv, revised version resubmitted to ApJ. The preprint with high resolution images is available from this http URL Two nearby stars, HD 128311 and HD 82943, are believed to host pairs of Jupiter-like planets involved in a strong first order 2:1 mean motion resonance (MMR). In this work we reanalyze available radial velocity (RV) measurements and demonstrate that it is also possible to explain the observed RV variations of the parents stars as being induced by a pair of Trojan planets (i.e., in a 1:1 MMR). We show that these Trojan configurations reside in extended zones of stability in which such systems may easily survive in spite of large masses of the planets, large eccentricities and nonzero mutual inclinations of their orbits. We also show that HD 82943 could harbor a previously unknown third planet about of 0.5 Jupiter masses in 2.1 AU orbit. http://arxiv.org/abs/astro-ph/0510109 From owner-public@setileague.org Tue Apr 4 08:55:01 2006 X-Spam-Checker-Version: SpamAssassin 3.1.0 (2005-09-13) on Sentry.net X-Spam-Level: X-Spam-Status: No, score=-2.6 required=5.0 tests=AWL,BAYES_00, MSGID_FROM_MTA_HEADER autolearn=unavailable version=3.1.0 Received: from seti1.setileague.org (seti1.setileague.org [204.176.91.10]) by Sentry.net (8.13.6/8.13.3) with ESMTP id k34Ft1U4028888 for ; Tue, 4 Apr 2006 08:55:01 -0700 Received: (from majordom@localhost) by seti1.setileague.org (8.9.3 (PHNE_24419+JAGae58098)/8.9.3) id LAA08823 for public-list; Tue, 4 Apr 2006 11:50:49 -0400 (EDT) X-Authentication-Warning: seti1.setileague.org: majordom set sender to owner-public@seti1.setileague.org using -f Received: from hotmail.com (bay114-f9.bay114.hotmail.com [65.54.169.19]) by seti1.setileague.org (8.9.3 (PHNE_24419+JAGae58098)/8.9.3) with ESMTP id LAA08819; Tue, 4 Apr 2006 11:50:46 -0400 (EDT) Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Tue, 4 Apr 2006 08:50:15 -0700 Message-ID: Received: from 65.54.169.200 by by114fd.bay114.hotmail.msn.com with HTTP; Tue, 04 Apr 2006 15:50:13 GMT X-Originating-IP: [24.39.94.195] X-Originating-Email: [ljk4@msn.com] X-Sender: ljk4@msn.com From: "LARRY KLAES" To: public@setileague.org Subject: SETI public: Planetary Radio interview with Paul Horowitz on Optical SETI Dedicated Observato Date: Tue, 04 Apr 2006 11:50:13 -0400 Mime-Version: 1.0 Content-Type: text/plain; format=flowed X-OriginalArrivalTime: 04 Apr 2006 15:50:15.0626 (UTC) FILETIME=[774A1AA0:01C657FF] Sender: owner-public@setileague.org Precedence: bulk Planetary Radio A Bright New Star in the Search for Extraterrestrial Intelligence Airdate: Monday, April 3, 2006 Running Time: 00:28:52 Listen: Windows Media | MP3 Harvard professor and SETI pioneer Paul Horowitz is about to unveil a powerful new tool dedicated to finding a brilliant flash of laser light coming from a distant civilization. He and his graduate student Andrew Howard talk with Mat about the new telescope, the first-ever Optical SETI Dedicated Observatory. Emily Lakdawalla is the go-to person if you're wondering why the Mars Exploration Rovers take a day off now and then. Bruce Betts knows What's Up, and presents a new space trivia contest. Guests - Paul Horowitz, Harvard University physicist Andrew Howard http://www.planetary.org/radio/show/00000171/ From owner-public@setileague.org Tue Apr 4 09:38:49 2006 X-Spam-Checker-Version: SpamAssassin 3.1.0 (2005-09-13) on Sentry.net X-Spam-Level: X-Spam-Status: No, score=-2.6 required=5.0 tests=AWL,BAYES_00, MSGID_FROM_MTA_HEADER autolearn=unavailable version=3.1.0 Received: from seti1.setileague.org (seti1.setileague.org [204.176.91.10]) by Sentry.net (8.13.6/8.13.3) with ESMTP id k34GcmTp029644 for ; Tue, 4 Apr 2006 09:38:49 -0700 Received: (from majordom@localhost) by seti1.setileague.org (8.9.3 (PHNE_24419+JAGae58098)/8.9.3) id MAA09883 for public-list; Tue, 4 Apr 2006 12:34:08 -0400 (EDT) X-Authentication-Warning: seti1.setileague.org: majordom set sender to owner-public@seti1.setileague.org using -f Received: from hotmail.com (bay114-f28.bay114.hotmail.com [65.54.169.38]) by seti1.setileague.org (8.9.3 (PHNE_24419+JAGae58098)/8.9.3) with ESMTP id MAA09879; Tue, 4 Apr 2006 12:34:06 -0400 (EDT) Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Tue, 4 Apr 2006 09:33:34 -0700 Message-ID: Received: from 65.54.169.200 by by114fd.bay114.hotmail.msn.com with HTTP; Tue, 04 Apr 2006 16:33:29 GMT X-Originating-IP: [24.39.94.195] X-Originating-Email: [ljk4@msn.com] X-Sender: ljk4@msn.com From: "LARRY KLAES" To: public@setileague.org Subject: SETI public: Disk Evolution in Young Binaries: from Observations to Theory Date: Tue, 04 Apr 2006 12:33:29 -0400 Mime-Version: 1.0 Content-Type: text/plain; format=flowed X-OriginalArrivalTime: 04 Apr 2006 16:33:34.0724 (UTC) FILETIME=[8478FC40:01C65805] Sender: owner-public@setileague.org Precedence: bulk Astrophysics, abstract astro-ph/0604031 From: Jean-Louis Monin [view email] Date: Mon, 3 Apr 2006 16:16:03 GMT (198kb) Disk Evolution in Young Binaries: from Observations to Theory Authors: J.-L. Monin, C. J. Clarke, L. Prato, C. McCabe Comments: 16 pages, 7 figures, chapter in Protostars and Planets V The formation of a binary system surrounded by disks is the most common outcome of stellar formation. Hence studying and understanding the formation and the evolution of binary systems and associated disks is a cornerstone of star formation science. Moreover, since the components within binary systems are coeval and the sizes of their disks are fixed by the tidal truncation of their companion, binary systems provide an ideal "laboratory" in which to study disk evolution under well defined boundary conditions. In this paper, we review observations of several inner disk diagnostics in multiple systems, including hydrogen emission lines (indicative of ongoing accretion), $K-L$ and $K-N$ color excesses (evidence of warm inner disks), and polarization (indicative of the relative orientations of the disks around each component). We examine to what degree these properties are correlated within binary systems and how this degree of correlation depends on parameters such as separation and binary mass ratio. These findings will be interpreted both in terms of models that treat each disk as an isolated reservoir and those in which the disks are subject to re-supply from some form of circumbinary reservoir, the observational evidence for which we will also critically review. The planet forming potential of multiple star systems is discussed in terms of the relative lifetimes of disks around single stars, binary primaries and binary secondaries. Finally, we summarize several potentially revealing observational problems and future projects that could provide further insight into disk evolution in the coming decade. http://arxiv.org/abs/astro-ph/0604031 From owner-public@setileague.org Wed Apr 5 10:24:40 2006 X-Spam-Checker-Version: SpamAssassin 3.1.0 (2005-09-13) on Sentry.net X-Spam-Level: X-Spam-Status: No, score=-2.6 required=5.0 tests=AWL,BAYES_00, MSGID_FROM_MTA_HEADER autolearn=ham version=3.1.0 Received: from seti1.setileague.org (seti1.setileague.org [204.176.91.10]) by Sentry.net (8.13.6/8.13.3) with ESMTP id k35HOdr5026616 for ; Wed, 5 Apr 2006 10:24:39 -0700 Received: (from majordom@localhost) by seti1.setileague.org (8.9.3 (PHNE_24419+JAGae58098)/8.9.3) id NAA14253 for public-list; Wed, 5 Apr 2006 13:20:34 -0400 (EDT) X-Authentication-Warning: seti1.setileague.org: majordom set sender to owner-public@seti1.setileague.org using -f Received: from hotmail.com (bay114-f35.bay114.hotmail.com [65.54.169.45]) by seti1.setileague.org (8.9.3 (PHNE_24419+JAGae58098)/8.9.3) with ESMTP id NAA14249; Wed, 5 Apr 2006 13:20:32 -0400 (EDT) Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Wed, 5 Apr 2006 10:20:00 -0700 Message-ID: Received: from 65.54.169.200 by by114fd.bay114.hotmail.msn.com with HTTP; Wed, 05 Apr 2006 17:19:58 GMT X-Originating-IP: [129.44.238.191] X-Originating-Email: [ljk4@msn.com] X-Sender: ljk4@msn.com From: "LARRY KLAES" To: public@setileague.org Subject: SETI public: 4 papers, including Planetary Microlensing: From Prediction to Discovery Date: Wed, 05 Apr 2006 13:19:58 -0400 Mime-Version: 1.0 Content-Type: text/plain; format=flowed X-OriginalArrivalTime: 05 Apr 2006 17:20:00.0784 (UTC) FILETIME=[2B81C100:01C658D5] Sender: owner-public@setileague.org Precedence: bulk Astrophysics, abstract astro-ph/0604049 From: Joshua Pepper [view email] Date: Mon, 3 Apr 2006 21:49:04 GMT (827kb) Survey for Transiting Extrasolar Planets in Stellar Systems IV: Variables in the Field of NGC 1245 Authors: Joshua Pepper, Chris Burke Comments: 20 pages, 15 figures. Submitted to AJ. PDF version with full-resolution figures at this http URL The Survey for Transiting Extrasolar Planets in Stellar Systems (STEPSS) project is a search for planetary transits in open clusters. In this paper, we analyze the STEPSS observations of the open cluster NGC 1245 to determine the variable star content of the cluster. Out of 6787 stars observed with V < 22, of which ~870 are cluster members, we find 14 stars with clear intrinsic variability that are potential cluster members, and 29 clear variables that are not cluster members. None of these variables have been previously identified. We present light curves, finding charts, and stellar/photometric data on these variable objects. Several of the interacting binaries have estimated distances consistent with the cluster distance determined from isochrone fits to the color magnitude diagram. Four stars at the main sequence turnoff of the cluster have light curves consistent with gamma Doradus variability. If these gamma Doradus candidates are confirmed, they represent the oldest and coolest members of this class of variable discovered to date. http://arxiv.org/abs/astro-ph/0604049 Astrophysics, abstract astro-ph/0604054 From: A-Ran Lyo [view email] Date: Tue, 4 Apr 2006 06:57:49 GMT (244kb) A deep photometric survey of the eta Chamaeleontis cluster down to the brown dwarf - planet boundary Authors: A-Ran Lyo, Inseok Song, Warrick A. Lawson, M. S. Bessell, B. Zuckerman Comments: 5 pages with 4 figures, accepted by MNRAS We report the outcome of the deep optical/infrared photometric survey of the central region (33 X 33 arcmin or 0.9 pc^2) of the eta Chamaeleontis pre-main sequence star cluster. The completeness limits of the photometry are I = 19.1, J = 18.2 and H = 17.6; faint enough to reveal low mass members down to the brown dwarf and planet boundary of ~ 13 M_Jup. We found no such low mass members in this region. Our result combined with a previous shallower (I = 17) but larger area survey indicates that low mass objects (0.013 < M/M(solar mass) < 0.075) either were not created in the eta Cha cluster or were lost due to the early dynamical history of the cluster and ejected to outside the surveyed areas. http://arxiv.org/abs/astro-ph/0604054 Astrophysics, abstract astro-ph/0604062 From: Nicholas Rattenbury [view email] Date: Tue, 4 Apr 2006 13:57:31 GMT (109kb) Planetary Microlensing: From Prediction to Discovery Authors: Nicholas James Rattenbury Comments: Invited review for Modern Physics Letters A, accepted. 15 pages, 6 figures Four planets have recently been discovered by gravitational microlensing. The most recent of these discoveries is the lightest planet known to exist around a normal star. The detection of planets in gravitational microlensing events was predicted over a decade ago. Microlensing is now a mature field of astrophysical research and the recent planet detections herald a new chapter in the hunt for low mass extra-solar planets. This paper reviews the basic theory of planetary microlensing, describes the experiments currently in operation for the detection and observation of microlensing events and compares the characteristics of the planetary systems found to date by microlensing. Some proposed schemes for improving the detection rate of planets via microlensing are also discussed. http://arxiv.org/abs/astro-ph/0604062 Astrophysics, abstract astro-ph/0604067 From: Christophe Pinte [view email] Date: Tue, 4 Apr 2006 15:51:41 GMT (80kb) Radiative transfer in protoplanetary disks Authors: Christophe Pinte, Francois Menard, Gaspard Duchene Comments: 20 pages, 11 figures, GRETA conference : "Radiative transfer and Applications to Very Large Telescopes" We present a new 3D continuum radiative transfer code, MCFOST, based on a Monte-Carlo method. The reliability and efficiency of the code is tested by comparison with five different radiative transfer codes previously tested by Pascucci et al., 2004, using a 2D disk configuration. When tested against the same disk configuration, no significant difference is found between the temperature and SED calculated with MCFOST and with the other codes. The computed values are well within the range of values computed by the other codes. The code-to-code differences are small, they rarely exceed 10% and are usually much smaller. http://arxiv.org/abs/astro-ph/0604067 From owner-public@setileague.org Wed Apr 5 12:13:02 2006 X-Spam-Checker-Version: SpamAssassin 3.1.0 (2005-09-13) on Sentry.net X-Spam-Level: X-Spam-Status: No, score=-2.6 required=5.0 tests=AWL,BAYES_00, MSGID_FROM_MTA_HEADER autolearn=unavailable version=3.1.0 Received: from seti1.setileague.org (seti1.setileague.org [204.176.91.10]) by Sentry.net (8.13.6/8.13.3) with ESMTP id k35JD1Yt028330 for ; Wed, 5 Apr 2006 12:13:02 -0700 Received: (from majordom@localhost) by seti1.setileague.org (8.9.3 (PHNE_24419+JAGae58098)/8.9.3) id OAA16724 for public-list; Wed, 5 Apr 2006 14:59:55 -0400 (EDT) X-Authentication-Warning: seti1.setileague.org: majordom set sender to owner-public@seti1.setileague.org using -f Received: from hotmail.com (bay114-f34.bay114.hotmail.com [65.54.169.44]) by seti1.setileague.org (8.9.3 (PHNE_24419+JAGae58098)/8.9.3) with ESMTP id OAA16705; Wed, 5 Apr 2006 14:59:51 -0400 (EDT) Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Wed, 5 Apr 2006 11:59:15 -0700 Message-ID: Received: from 65.54.169.200 by by114fd.bay114.hotmail.msn.com with HTTP; Wed, 05 Apr 2006 18:59:11 GMT X-Originating-IP: [24.39.94.195] X-Originating-Email: [ljk4@msn.com] X-Sender: ljk4@msn.com From: "LARRY KLAES" To: public@setileague.org Subject: SETI public: FW: NASA's Spitzer Finds Hints of Planet Birth Around Dead Star Date: Wed, 05 Apr 2006 14:59:11 -0400 Mime-Version: 1.0 Content-Type: text/plain; format=flowed X-OriginalArrivalTime: 05 Apr 2006 18:59:15.0903 (UTC) FILETIME=[0908CCF0:01C658E3] Sender: owner-public@setileague.org Precedence: bulk >From: "NASA Jet Propulsion Laboratory" >Reply-To: >Subject: NASA's Spitzer Finds Hints of Planet Birth Around Dead Star >Date: Wed, 05 Apr 2006 11:53:43 -0700 > >MEDIA RELATIONS OFFICE >JET PROPULSION LABORATORY >CALIFORNIA INSTITUTE OF TECHNOLOGY >NATIONAL AERONAUTICS AND SPACE ADMINISTRATION >PASADENA, CALIF. 91109 TELEPHONE (818) 354-5011 >http://www.jpl.nasa.gov > >Whitney Clavin >Jet Propulsion Laboratory, Pasadena, Calif. >(818) 354-4673 > >Erica Hupp/Grey Hautaluoma >Headquarters, Washington >(202) 358-1237/0668 > >News Release: 2006-049 April 5, 2004 > >NASA's Spitzer Finds Hints of Planet Birth Around Dead Star > >NASA's Spitzer Space Telescope has uncovered new evidence that planets >might rise up out of a >dead star's ashes. > >The infrared telescope surveyed the scene around a pulsar, the remnant of >an exploded star, and >found a surrounding disk made up of debris shot out during the star's death >throes. The dusty >rubble in this disk might ultimately stick together to form planets. > >This is the first time scientists have detected planet-building materials >around a star that died in a >fiery blast. > >"We're amazed that the planet-formation process seems to be so universal," >said Dr. Deepto >Chakrabarty of the Massachusetts Institute of Technology in Cambridge, >principal investigator of >the new research. "Pulsars emit a tremendous amount of high energy >radiation, yet within this >harsh environment we have a disk that looks a lot like those around young >stars where planets >are formed." > >A paper on the Spitzer finding appears in the April 6 issue of Nature. >Other authors of the paper >are lead author Zhongxiang Wang and co-author David Kaplan, both of the >Massachusetts >Institute of Technology. > >The finding also represents the missing piece in a puzzle that arose in >1992, when Dr. >Aleksander Wolszczan of Pennsylvania State University found three planets >circling a pulsar >called PSR B1257+12. Those pulsar planets, two the size of Earth, were the >first planets of any >type ever discovered outside our solar system. Astronomers have since found >indirect evidence >the pulsar planets were born out of a dusty debris disk, but nobody had >directly detected this kind >of disk until now. > >The pulsar observed by Spitzer, named 4U 0142+61, is 13,000 light-years >away in the >Cassiopeia constellation. It was once a large, bright star with a mass >between 10 and 20 times >that of our sun. The star probably survived for about 10 million years, >until it collapsed under its >own weight about 100,000 years ago and blasted apart in a supernova >explosion. > >Some of the debris, or "fallback," from that explosion eventually settled >into a disk orbiting the >shrunken remains of the star, or pulsar. Spitzer was able to spot the warm >glow of the dusty disk >with its heat-seeking infrared eyes. The disk orbits at a distance of about >1 million miles and >probably contains about 10 Earth-masses of material. > >Pulsars are a class of supernova remnants, called neutron stars, which are >incredibly dense. They >have masses about 1.4 times that of the sun squeezed into bodies only 10 >miles wide. One >teaspoon of a neutron star would weigh about 2 billion tons. Pulsar 4U >0142+61 is an X-ray >pulsar, meaning that it spins and pulses with X-ray radiation. > >Any planets around the stars that gave rise to pulsars would have been >incinerated when the stars >blew up. The pulsar disk discovered by Spitzer might represent the first >step in the formation of a >new, more exotic type of planetary system, similar to the one found by >Wolszczan in 1992. > >"I find it very exciting to see direct evidence that the debris around a >pulsar is capable of forming >itself into a disk. This might be the beginning of a second generation of >planets," Wolszczan >said. > >Pulsar planets would be bathed in intense radiation and would be quite >different from those in >our solar system. "These planets must be among the least hospitable places >in the galaxy for the >formation of life," said Dr. Charles Beichman, an astronomer at NASA's Jet >Propulsion >Laboratory and the California Institute of Technology, both in Pasadena, >Calif. > >The Jet Propulsion Laboratory manages the Spitzer Space Telescope mission >for NASA's >Science Mission Directorate, Washington. Science operations are conducted >at the Spitzer >Science Center at Caltech. JPL is a division of Caltech. Spitzer's infrared >array camera, which >made the pulsar observations, was built by NASA's Goddard Space Flight >Center, Greenbelt, >Md. The instrument's principal investigator is Dr. Giovanni Fazio of the >Harvard-Smithsonian >Center for Astrophysics. > >For more information about Spitzer, visit: > >www.spitzer.caltech.edu/spitzer > >-end- > From owner-public@setileague.org Thu Apr 6 12:45:56 2006 X-Spam-Checker-Version: SpamAssassin 3.1.0 (2005-09-13) on Sentry.net X-Spam-Level: X-Spam-Status: No, score=-2.6 required=5.0 tests=AWL,BAYES_00, MSGID_FROM_MTA_HEADER autolearn=ham version=3.1.0 Received: from seti1.setileague.org (seti1.setileague.org [204.176.91.10]) by Sentry.net (8.13.6/8.13.3) with ESMTP id k36Jjt26002069 for ; Thu, 6 Apr 2006 12:45:56 -0700 Received: (from majordom@localhost) by seti1.setileague.org (8.9.3 (PHNE_24419+JAGae58098)/8.9.3) id PAA24961 for public-list; Thu, 6 Apr 2006 15:36:49 -0400 (EDT) X-Authentication-Warning: seti1.setileague.org: majordom set sender to owner-public@seti1.setileague.org using -f Received: from hotmail.com (bay114-f36.bay114.hotmail.com [65.54.169.46]) by seti1.setileague.org (8.9.3 (PHNE_24419+JAGae58098)/8.9.3) with ESMTP id PAA24956 for ; Thu, 6 Apr 2006 15:36:47 -0400 (EDT) Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Thu, 6 Apr 2006 12:36:16 -0700 Message-ID: Received: from 65.54.169.200 by by114fd.bay114.hotmail.msn.com with HTTP; Thu, 06 Apr 2006 19:36:12 GMT X-Originating-IP: [71.240.250.28] X-Originating-Email: [ljk4@msn.com] X-Sender: ljk4@msn.com From: "LARRY KLAES" To: public@setileague.org Subject: SETI public: FW: AAVSO Alert Notice 337 Date: Thu, 06 Apr 2006 15:36:12 -0400 Mime-Version: 1.0 Content-Type: text/plain; format=flowed X-OriginalArrivalTime: 06 Apr 2006 19:36:16.0116 (UTC) FILETIME=[5ECC2B40:01C659B1] Sender: owner-public@setileague.org Precedence: bulk >From: aavso@mira.aavso.org >To: aavso@mira.aavso.org >Subject: AAVSO Alert Notice 337 Date: Thu, 6 Apr 2006 11:09:15 -0400 (EDT) > > THE AMERICAN ASSOCIATION OF VARIABLE STAR OBSERVERS > 25 Birch Street, Cambridge, MA 02138 USA > aavso@aavso.org > Tel. 617-354-0484 Fax 617-354-0665 > > AAVSO ALERT NOTICE 337 (April 6, 2006) > >SUBJECT: 2107+44 V2362 CYGNI = NOVA CYGNI 2006 > >Event: Nova in Cygnus > >Discovered By: Hideo Nishimura, Miyawaki, Kakegawa, Japan (reported by S. >Nakano, Sumoto, Japan) (IAU Circular 8697) > >Discovery Magnitude: photographic magnitude 10.5, T-Max 400 film (IAU >Circular 8697) > >Discovery Date: April 2.80667 UT (IAU Circular 8697) > >Position: provided by Richard Miles, Stourton Caundle, Dorset, England, >from >his image taken Apr. 04.9947 UT > R.A. (2000): 21h 11m 32.34s > Decl. (2000): +44o 48' 03.9" > >AAVSO Chart(s): 'd' and 'dr' scale charts are available at >http://www.aavso.org/cgi-bin/searchcharts3.pl?name=n%20cyg%2006 > >Report Object to the AAVSO as: 2107+44 V2362 CYG > >How to Observe: visually or photometrically (V, Rc, or Ic filter) > >Observations Reported to the AAVSO: >Mar. 23 UT, <12 photographic (T-Max 400), H. Nishimura, Miyawaki, >Kakegawa, Japan (via S. Nakano, IAU Circular 8697); >Apr. 02.80667, 10.5 photographic (Nishimura, IAU Circular 8697); >04.91228, 7.78 +/-0.1 R-mag (unfiltered CCD that has a near-red >response) (comp star GSC 03181-01159), G. Klingenberg, Baasmoen, >Norway; >04.9947, 8.5 V +/-0.3, R. Miles, Stouton Caundle, Dorset, England; >05.0073, 8.319 V +/-0.007, Miles; >05.0113, 8.324 V +/-0.006, Miles; >05.0152, 8.317 V +/-0.007, Miles; >05.0192, 8.324 V +/-0.007, Miles; >05.0231, 8.327 V +/-0.007, Miles; >05.0270, 8.316 V +/-0.008, Miles; >05.0310, 8.324 V +/-0.009, Miles; >05.0364, 8.308 V +/-0.008, Miles; >05.0404, 8.329 V +/-0.008, Miles; >05.0444, 8.316 V +/-0.008, Miles; >05.0483, 8.321 V +/-0.005, Miles; >05.0519, 8.318 V +/-0.003, Miles; >05.0550, 8.323 V +/-0.004, Miles; >05.0609, 8.316 V +/-0.005, Miles; >05.0637, 8.325 V +/-0.005, Miles; >05.0665, 8.312 V +/-0.007, Miles; >05.0693, 8.316 V +/-0.009, Miles; >05.0721, 8.305 V +/-0.008, Miles; >05.0749, 8.305 V +/-0.007, Miles; >05.0777, 8.297 V +/-0.004, Miles; >05.0805, 8.305 V +/-0.004, Miles; >05.0832, 8.304 V +/-0.003, Miles; >05.0862, 8.305 V +/-0.003, Miles; >05.0888, 8.302 V +/-0.003, Miles; >05.0916, 8.304 V +/-0.003, Miles; >05.0944, 8.297 V +/-0.003, Miles; >05.0972, 8.301 V +/-0.005, Miles; >05.0999, 8.298 V +/-0.006, Miles; >05.1027, 8.290 V +/-0.006, Miles; >05.1055, 8.309 V +/-0.005, Miles; >05.1083, 8.305 V +/-0.005, Miles; >05.1111, 8.304 V +/-0.004, Miles; >05.1139, 8.301 V +/-0.004, Miles; >05.28912, 8.239 V +/-0.014 (compstar GSC 3181-1159 = 9.68V), R. Huziak, >Saskatoon, Saskatchewan; >05.28995, 8.216 V +/-0.012, Huziak; >05.29078, 8.254 V +/-0.012, Huziak; >05.29161, 8.254 V +/-0.025, Huziak; >05.29243, 8.246 V +/-0.019, Huziak; >05.29409, 8.240 V +/-0.029, Huziak; >05.4271, 8.5: (film; comp star mags from TheSky), D. West, Mulvane, KS; >05.4352, 8.331 V +/-0.013, S. Dvorak, Clermont, FL; >05.4361, 8.319 V +/-0.005, Dvorak; >05.4597, 8.285 V +/-0.004, T. Crawford, Portland, OR; >05.79, 7.9 ptg, Nishimura (IAU Circular 8698); >05.9020, 8.5, B. Granslo, Fjelhammar, Norway; >05.97, 8.5, M. Reszelski, Szamotuly-Galawo, Poland; >06.1250, 8.2, G. Poyner, Birmingham, England; >06.1597, 7.8, A. Kammerer, Malsch, Germany; >06.1653, 8.1, M. Biesmans, Essen, Belgium; >06.3160, 8.1. M. Komorous, London, Ontario, Canada; >06.4222, 8.0, C. Chiselbrook, Marietta, GA. > >Spectra: Low-resolution spectra obtained about Apr. 05.8 UT by several >Japanese observers, including K. Kinugasa, H. Naito and S. Ozaki, and M. >Fujii, >and reported by H. Yamaoka in IAU Circular 8698, indicate a classical nova >discovered slightly before maximum, with some interstellar reddening. > >Notes: >a. Confirmed by Richard Miles, Stourton Caundle, Dorset, England. >b. Nishimura reports nothing visible down to magnitude 12 on films back to >October 2001, and provides the following position: R.A. 21:11:32 >Decl. +44:48:02 (2000.0) (IAU Circular 8697). >c. Geir Klingenberg, Baasmoen, Norway, provides the following precise >position >from his image taken April 4: RA 21:11:32.36 Decl +44:48:03.3 (2000.0). >d. Miles reports nothing was visible on DSS-2 at the position of the nova, >and >that the nova is not the red star noted by Yamaoka (see Note e). >e. H. Yamaoka, Kyushu University, Japan, notes that a mag ~14 very red star >in several star catalogues has position end figures about 31.9s, 03.3" (IAU >Circular 8697). >f. Miles reports that 33 simultaneous 2-color photometric measurements made >with 0.06-m refractors show that at Apr. 05.07 UT the nova was brightening >by >0.25 +/-0.03 magnitude/day and becoming redder in (V-Ic) at the rate of >0.10 >+/-0.04 magnitude/day. His first and last observations are Apr 05.0073, >8.319 V, >(V-Ic)=0.793; Apr 05.6139, 8.301 V, (V-Ic)=0.813. >g. Nikolai N. Samus, Russian Academy of Sciences, announced that Nova Cyg >2006 >has been assigned the name V2362 Cyg (IAU Circular 8698). >h. A page on V2362 Cyg will be created on the AAVSO website. Observers are >invited to post images and other related materials there. >i. Previously announced in AAVSO Special Notice #10 (April 4, 2006), >prepared >by Aaron Price. >j. For more information, see the announcements in International >Astronomical Union (IAU) Circular Nos. 8697 and 8698, Daniel E. W. Green, >Ed. > >Many thanks for your valuable astronomical contributions and your efforts. > >Good observing! > >Elizabeth Waagen >Senior Technical Assistant > >SUBMIT OBSERVATIONS TO THE AAVSO > >Information on submitting observations to the AAVSO may be found at: > > http://www.aavso.org/observing/submit/ > >If you cannot access this URL, please contact us for submission details. >You may also use our charge-free number (888-802-STAR = 888-802-7827) or >our fax (617-354-0665) to report your observations. > >ALERT NOTICE ARCHIVE AND SUBSCRIPTION INFORMATION > >An Alert Notice archive is available at the following URL: >http://www.aavso.org/publications/alerts/ > >Subscribing and Unsubscribing can be done at the following URL: >http://www.aavso.org/publications/email/ >------------------------------------------------------------------- > From owner-public@setileague.org Fri Apr 7 07:27:57 2006 X-Spam-Checker-Version: SpamAssassin 3.1.0 (2005-09-13) on Sentry.net X-Spam-Level: X-Spam-Status: No, score=-2.6 required=5.0 tests=AWL,BAYES_00, MSGID_FROM_MTA_HEADER autolearn=unavailable version=3.1.0 Received: from seti1.setileague.org (seti1.setileague.org [204.176.91.10]) by Sentry.net (8.13.6/8.13.3) with ESMTP id k37ERuIB010987 for ; Fri, 7 Apr 2006 07:27:57 -0700 Received: (from majordom@localhost) by seti1.setileague.org (8.9.3 (PHNE_24419+JAGae58098)/8.9.3) id KAA23912 for public-list; Fri, 7 Apr 2006 10:22:51 -0400 (EDT) X-Authentication-Warning: seti1.setileague.org: majordom set sender to owner-public@seti1.setileague.org using -f Received: from hotmail.com (bay114-f38.bay114.hotmail.com [65.54.169.48]) by seti1.setileague.org (8.9.3 (PHNE_24419+JAGae58098)/8.9.3) with ESMTP id KAA23908; Fri, 7 Apr 2006 10:22:49 -0400 (EDT) Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Fri, 7 Apr 2006 07:22:17 -0700 Message-ID: Received: from 65.54.169.200 by by114fd.bay114.hotmail.msn.com with HTTP; Fri, 07 Apr 2006 14:22:15 GMT X-Originating-IP: [70.16.56.60] X-Originating-Email: [ljk4@msn.com] X-Sender: ljk4@msn.com From: "LARRY KLAES" To: public@setileague.org Subject: SETI public: 2 papers Date: Fri, 07 Apr 2006 10:22:15 -0400 Mime-Version: 1.0 Content-Type: text/plain; format=flowed X-OriginalArrivalTime: 07 Apr 2006 14:22:17.0947 (UTC) FILETIME=[ACC972B0:01C65A4E] Sender: owner-public@setileague.org Precedence: bulk Astrophysics, abstract astro-ph/0604077 From: Dimitri Veras [view email] Date: Tue, 4 Apr 2006 20:02:19 GMT (96kb) Predictions for the correlation between giant and terrestrial extrasolar planets in dynamically evolved systems Authors: Dimitri Veras, Philip J. Armitage Comments: 8 pages, 8 figures, 1 table, accepted for publication in ApJ The large eccentricities of many giant extrasolar planets may represent the endpoint of gravitational scattering in initially more crowded systems. If so, the early evolution of the giant planets is likely to be more restrictive of terrestrial planet formation than would be inferred from the current, dynamically quiescent, configurations. Here, we study statistically the extent of the anti-correlation between giant planets and terrestrial planets expected in a scattering model. We use marginally stable systems of three giant planets, with a realistic range of planetary masses, as a simple model for the initial conditions prior to scattering, and show that after scattering the surviving planets reproduce well the known extrasolar planet eccentricities beyond a > 0.5 AU. By tracking the minimum periastron values of all planets during the evolution, we derive the distribution of orbital radii across which strong perturbations (from crossing orbits) are likely to affect low mass planet formation. We find that scattering affects inner planet formation at orbital separations less than 50% of the final periastron distance of the innermost massive planet in approximately 30% of the realizations, and can occasionally influence planet formation at orbital separations less than 20% of the final periastron distance of the innermost massive planet. The domain of influence of the scattering massive planets increases as the mass differential between the massive planets decreases. Observational study of the correlation between massive and terrestrial extrasolar planets in the same system has the potential to constrain the origin of planetary eccentricity. http://xxx.lanl.gov/abs/astro-ph/0604077 Astrophysics, abstract astro-ph/0604078 From: Benjamin Collins [view email] Date: Tue, 4 Apr 2006 20:12:43 GMT (21kb) Protoplanet Dynamics in a Shear-Dominated Disk Authors: Benjamin F. Collins, Re'em Sari Comments: 8 pages, 2 figures The velocity dispersion, or eccentricity distribution, of protoplanets interacting with planetesimals is set by a balance between dynamical friction and viscous stirring. We calculate analytically the eccentricity distribution function of protoplanets embedded in a cold, shear-dominated planetesimal swarm. We find a distinctly non-Rayleigh distribution with a simple analytical form. The peak of the distribution lies much lower than the root-mean-squared value, indicating that while most of the bodies have similarly small eccentricities, a small subset of the population contains most of the thermal energy. We also measure the shear-dominated eccentricity distribution using numerical simulations. The numerical code treats each protoplanet explicitly and adds an additional force term to each body to represent the dynamical friction of the planetesimals. Without fitting any parameters, the eccentricity distribution of protoplanets in the N-body simulation agrees with the analytical results. This distribution function provides a useful tool for testing hybrid numerical simulations of late-stage planet formation. http://xxx.lanl.gov/abs/astro-ph/0604078 From owner-public@setileague.org Fri Apr 7 07:48:00 2006 X-Spam-Checker-Version: SpamAssassin 3.1.0 (2005-09-13) on Sentry.net X-Spam-Level: X-Spam-Status: No, score=-2.6 required=5.0 tests=AWL,BAYES_00, MSGID_FROM_MTA_HEADER autolearn=unavailable version=3.1.0 Received: from seti1.setileague.org (seti1.setileague.org [204.176.91.10]) by Sentry.net (8.13.6/8.13.3) with ESMTP id k37ElxnM011142 for ; Fri, 7 Apr 2006 07:47:59 -0700 Received: (from majordom@localhost) by seti1.setileague.org (8.9.3 (PHNE_24419+JAGae58098)/8.9.3) id KAA24286 for public-list; Fri, 7 Apr 2006 10:36:21 -0400 (EDT) X-Authentication-Warning: seti1.setileague.org: majordom set sender to owner-public@seti1.setileague.org using -f Received: from hotmail.com (bay114-f19.bay114.hotmail.com [65.54.169.29]) by seti1.setileague.org (8.9.3 (PHNE_24419+JAGae58098)/8.9.3) with ESMTP id KAA24282; Fri, 7 Apr 2006 10:36:19 -0400 (EDT) Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Fri, 7 Apr 2006 07:35:47 -0700 Message-ID: Received: from 65.54.169.200 by by114fd.bay114.hotmail.msn.com with HTTP; Fri, 07 Apr 2006 14:35:45 GMT X-Originating-IP: [70.16.56.60] X-Originating-Email: [ljk4@msn.com] X-Sender: ljk4@msn.com From: "LARRY KLAES" To: public@setileague.org Subject: SETI public: A Debris Disk Around An Isolated Young Neutron Star Date: Fri, 07 Apr 2006 10:35:45 -0400 Mime-Version: 1.0 Content-Type: text/plain; format=flowed X-OriginalArrivalTime: 07 Apr 2006 14:35:47.0971 (UTC) FILETIME=[8F994D30:01C65A50] Sender: owner-public@setileague.org Precedence: bulk Astrophysics, abstract astro-ph/0604076 From: Deepto Chakrabarty [view email] Date: Tue, 4 Apr 2006 20:01:47 GMT (80kb) A Debris Disk Around An Isolated Young Neutron Star Authors: Zhongxiang Wang, Deepto Chakrabarty, David L. Kaplan (MIT) Comments: 5 pages, 3 figures. To appear in Nature (6 Apr 2006) Pulsars are rotating, magnetized neutron stars that are born in supernova explosions following the collapse of the cores of massive stars. If some of the explosion ejecta fails to escape, it may fall back onto the neutron star or it may possess sufficient angular momentum to form a disk. Such 'fallback' is both a general prediction of current supernova models and, if the material pushes the neutron star over its stability limit, a possible mode of black hole formation. Fallback disks could dramatically affect the early evolution of pulsars, yet there are few observational constraints on whether significant fallback occurs or even the actual existence of such disks. Here we report the discovery of mid-infrared emission from a cool disk around an isolated young X-ray pulsar. The disk does not power the pulsar's X-ray emission but is passively illuminated by these X-rays. The estimated mass of the disk is of order 10 Earth masses, and its lifetime (at least a million years) significantly exceeds the spin-down age of the pulsar, supporting a supernova fallback origin. The disk resembles protoplanetary disks seen around ordinary young stars, suggesting the possibility of planet formation around young neutron stars. http://xxx.lanl.gov/abs/astro-ph/0604076 From owner-public@setileague.org Fri Apr 7 11:55:54 2006 X-Spam-Checker-Version: SpamAssassin 3.1.0 (2005-09-13) on Sentry.net X-Spam-Level: X-Spam-Status: No, score=-2.6 required=5.0 tests=AWL,BAYES_00, MSGID_FROM_MTA_HEADER autolearn=unavailable version=3.1.0 Received: from seti1.setileague.org (seti1.setileague.org [204.176.91.10]) by Sentry.net (8.13.6/8.13.3) with ESMTP id k37Itr9v012730 for ; Fri, 7 Apr 2006 11:55:54 -0700 Received: (from majordom@localhost) by seti1.setileague.org (8.9.3 (PHNE_24419+JAGae58098)/8.9.3) id OAA01401 for public-list; Fri, 7 Apr 2006 14:49:44 -0400 (EDT) X-Authentication-Warning: seti1.setileague.org: majordom set sender to owner-public@seti1.setileague.org using -f Received: from hotmail.com (bay114-f23.bay114.hotmail.com [65.54.169.33]) by seti1.setileague.org (8.9.3 (PHNE_24419+JAGae58098)/8.9.3) with ESMTP id OAA01397; Fri, 7 Apr 2006 14:49:42 -0400 (EDT) Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Fri, 7 Apr 2006 11:49:11 -0700 Message-ID: Received: from 65.54.169.200 by by114fd.bay114.hotmail.msn.com with HTTP; Fri, 07 Apr 2006 18:49:07 GMT X-Originating-IP: [70.16.56.60] X-Originating-Email: [ljk4@msn.com] X-Sender: ljk4@msn.com From: "LARRY KLAES" To: public@setileague.org Subject: SETI public: Protecting Life in the Milky Way: Metals Keep the GRBs Away Date: Fri, 07 Apr 2006 14:49:07 -0400 Mime-Version: 1.0 Content-Type: text/plain; format=flowed X-OriginalArrivalTime: 07 Apr 2006 18:49:11.0151 (UTC) FILETIME=[F56677F0:01C65A73] Sender: owner-public@setileague.org Precedence: bulk Astrophysics, abstract astro-ph/0604113 From: Krzysztof Stanek [view email] Date: Thu, 6 Apr 2006 17:04:08 GMT (309kb) Protecting Life in the Milky Way: Metals Keep the GRBs Away Authors: K. Z. Stanek, O. Y. Gnedin, J. F. Beacom, A. P. Gould, J. A. Johnson, J. A. Kollmeier, M. Modjaz, M. H. Pinsonneault, R. Pogge, D. H. Weinberg Comments: ApJ, submitted, 14 pages, 3 figures The host galaxies of the four local, z<0.17, long-duration gamma-ray bursts, each of which had an associated hypernova studied with optical spectroscopy, are all faint and metal-poor compared to the population of local star-forming galaxies. We quantify this statement by using a previous analysis of star-forming galaxies (z<0.2) from the Sloan Digital Sky Survey to estimate the fraction of local star formation as a function of host galaxy oxygen abundance. We find that only a small fraction (<20%) of current star formation occurs in galaxies with oxygen abundance 12+log(O/H)<8.6, i.e., about half that of the Milky Way. However, all four low-z GRB hosts have oxygen abundance below this limit, in three cases very significantly so. If GRBs traced local star formation independent of metallicity, the probability of obtaining such low abundances for all four hosts would be P~0.15%. We conclude that GRBs trace only low-metallicity star formation, and that the Milky Way has been too metal rich to host long GRBs for at least the last several billion years. This result has implications for the potential role of GRBs in mass extinctions, for searches for recent burst remnants in the Milky Way and other large galaxies, for non-detections of late radio emission from local core-collapse supernovae, and for the production of cosmic rays in the local Universe. We also find that the isotropic energy release of these four GRBs, E_iso, steeply decreases with increasing host oxygen abundance, suggesting an upper metallicity limit for ``cosmological'' GRBs at ~0.15 Z_solar. (Abridged) http://xxx.lanl.gov/abs/astro-ph/0604113 From owner-public@setileague.org Fri Apr 7 11:57:55 2006 X-Spam-Checker-Version: SpamAssassin 3.1.0 (2005-09-13) on Sentry.net X-Spam-Level: X-Spam-Status: No, score=-2.6 required=5.0 tests=AWL,BAYES_00, MSGID_FROM_MTA_HEADER autolearn=ham version=3.1.0 Received: from seti1.setileague.org (seti1.setileague.org [204.176.91.10]) by Sentry.net (8.13.6/8.13.3) with ESMTP id k37IvtW1012754 for ; Fri, 7 Apr 2006 11:57:55 -0700 Received: (from majordom@localhost) by seti1.setileague.org (8.9.3 (PHNE_24419+JAGae58098)/8.9.3) id OAA01532 for public-list; Fri, 7 Apr 2006 14:53:35 -0400 (EDT) X-Authentication-Warning: seti1.setileague.org: majordom set sender to owner-public@seti1.setileague.org using -f Received: from hotmail.com (bay114-f2.bay114.hotmail.com [65.54.169.12]) by seti1.setileague.org (8.9.3 (PHNE_24419+JAGae58098)/8.9.3) with ESMTP id OAA01528; Fri, 7 Apr 2006 14:53:32 -0400 (EDT) Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Fri, 7 Apr 2006 11:53:01 -0700 Message-ID: Received: from 65.54.169.200 by by114fd.bay114.hotmail.msn.com with HTTP; Fri, 07 Apr 2006 18:52:57 GMT X-Originating-IP: [70.16.56.60] X-Originating-Email: [ljk4@msn.com] X-Sender: ljk4@msn.com From: "LARRY KLAES" To: public@setileague.org Subject: SETI public: Spitzer/MIPS Limits on Asteroidal Dust in the Pulsar Planetary System PSR B1257+ Date: Fri, 07 Apr 2006 14:52:57 -0400 Mime-Version: 1.0 Content-Type: text/plain; format=flowed X-OriginalArrivalTime: 07 Apr 2006 18:53:01.0790 (UTC) FILETIME=[7EDF2FE0:01C65A74] Sender: owner-public@setileague.org Precedence: bulk Astrophysics, abstract astro-ph/0604115 From: Geoffrey Bryden [view email] Date: Wed, 5 Apr 2006 22:08:54 GMT (35kb) Spitzer/MIPS Limits on Asteroidal Dust in the Pulsar Planetary System PSR B1257+1 Authors: G. Bryden, C. A. Beichman, G. H. Rieke, J. A. Stansberry, K. R. Stapelfeldt, D. E. Trilling, N. J. Turner, A. Wolszczan With the MIPS camera on Spitzer, we have searched for far-infrared emission from dust in the planetary system orbiting pulsar PSR 1257+12. With accuracies of 0.05 mJy at 24 um and 1.5 mJy at 70 um, photometric measurements find no evidence for emission at these wavelengths. These observations place new upper limits on the luminosity of dust with temperatures between 20 and 1000 K. They are particularly sensitive to dust temperatures of 100-200 K, for which they limit the dust luminosity to below $3 \times 10^{-5}$ of the pulsar's spin-down luminosity, three orders of magnitude better than previous limits. Despite these improved constraints on dust emission, an asteroid belt similar to the Solar System's cannot be ruled out. http://xxx.lanl.gov/abs/astro-ph/0604115 From owner-public@setileague.org Tue Apr 11 11:24:37 2006 X-Spam-Checker-Version: SpamAssassin 3.1.0 (2005-09-13) on Sentry.net X-Spam-Level: X-Spam-Status: No, score=-2.6 required=5.0 tests=AWL,BAYES_00, MSGID_FROM_MTA_HEADER autolearn=unavailable version=3.1.0 Received: from seti1.setileague.org (seti1.setileague.org [204.176.91.10]) by Sentry.net (8.13.6/8.13.3) with ESMTP id k3BIOa7w021547 for ; Tue, 11 Apr 2006 11:24:36 -0700 Received: (from majordom@localhost) by seti1.setileague.org (8.9.3 (PHNE_24419+JAGae58098)/8.9.3) id OAA03132 for public-list; Tue, 11 Apr 2006 14:06:16 -0400 (EDT) X-Authentication-Warning: seti1.setileague.org: majordom set sender to owner-public@seti1.setileague.org using -f Received: from hotmail.com (bay114-f20.bay114.hotmail.com [65.54.169.30]) by seti1.setileague.org (8.9.3 (PHNE_24419+JAGae58098)/8.9.3) with ESMTP id OAA03128; Tue, 11 Apr 2006 14:06:13 -0400 (EDT) Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Tue, 11 Apr 2006 11:05:41 -0700 Message-ID: Received: from 65.54.169.200 by by114fd.bay114.hotmail.msn.com with HTTP; Tue, 11 Apr 2006 18:05:38 GMT X-Originating-IP: [24.39.94.195] X-Originating-Email: [ljk4@msn.com] X-Sender: ljk4@msn.com From: "LARRY KLAES" To: public@setileague.org Subject: SETI public: FW: HUBBLE FINDS THAT THE 'TENTH PLANET' IS SLIGHTLY LARGER THAN PLUTO (STScI-PR06-16) Date: Tue, 11 Apr 2006 14:05:38 -0400 Mime-Version: 1.0 Content-Type: text/plain; format=flowed X-OriginalArrivalTime: 11 Apr 2006 18:05:41.0417 (UTC) FILETIME=[8B87A990:01C65D92] Sender: owner-public@setileague.org Precedence: bulk >From: "INBOX ASTRONOMY: NEWS ALERT" >Reply-To: owner-public@stsci.edu >To: public@stsci.edu >Subject: HUBBLE FINDS THAT THE 'TENTH PLANET' IS SLIGHTLY LARGER THAN PLUTO >(STScI-PR06-16) >Date: Tue, 11 Apr 2006 13:52:37 -0400 > >FOR RELEASE: 1:00 pm (EDT) April 11, 2006 > >Erica Hupp/Dwayne Brown >Headquarters, Washington >(Phone: 202/358-1237/1726) > >Ray Villard >Space Telescope Science Institute, Baltimore, Md. >(Phone: 410/338-4514; E-mail: villard@stsci.edu) > >PRESS RELEASE NO.: STScI-PR06-16 > >HUBBLE FINDS THAT THE 'TENTH PLANET' IS SLIGHTLY LARGER THAN PLUTO > >NASA's Hubble Space Telescope has resolved the "tenth planet," nicknamed >"Xena," for the first time and has found that it is only just a little >larger than Pluto. Though previous ground-based observations suggested >that Xena was about 30 percent greater in diameter than Pluto, Hubble >observations taken on Dec. 9 and 10, 2005, yield a diameter of 1,490 >miles (with an uncertainty of 60 miles) for Xena. Pluto's diameter, as >measured by Hubble, is 1,422 miles. > >Xena is officially catalogued as 2003 UB313. It is the large object at >the bottom of this artist's concept. A portion of its surface is lit by >the Sun, located in the upper left corner of the image. Xena's >companion, Gabrielle, is located just above and to the left of Xena. > >For electronic images and additional information about the research on >the Web, visit: >http://hubblesite.org/news/2006/16 >http://www.nasa.gov/hubble > >For more information, contact Robert Tindol, California Institute of >Technology, Pasadena, CA, (phone) 626-395-3631, (e-mail) >tindol@caltech.edu, or Mike Brown, California Institute of Technology, >Pasadena, CA, (phone) 626-395-8423, (e-mail) mbrown@gps.caltech.edu . > >The Hubble Space Telescope is a project of international cooperation >between NASA and the European Space Agency. The Space Telescope Science >Institute in Baltimore conducts Hubble science operations. The Institute >is operated for NASA by the Association of Universities for Research in >Astronomy, Inc., Washington. > >You are receiving this email because you are subscribed to the Inbox >Astronomy: News Alert mailing list, which sends text-only notifications >whenever there is a new Hubble Space Telescope image, product, or news >update. If you would like to unsubscribe or change your e-mail >preferences, please go to: >http://hubblesite.org/newscenter/hubble_on_the_go/inbox_astronomy/ > From owner-public@setileague.org Wed Apr 12 08:02:01 2006 X-Spam-Checker-Version: SpamAssassin 3.1.0 (2005-09-13) on Sentry.net X-Spam-Level: X-Spam-Status: No, score=-2.6 required=5.0 tests=AWL,BAYES_00, MSGID_FROM_MTA_HEADER autolearn=unavailable version=3.1.0 Received: from seti1.setileague.org (seti1.setileague.org [204.176.91.10]) by Sentry.net (8.13.6/8.13.3) with ESMTP id k3CF205O008242 for ; Wed, 12 Apr 2006 08:02:00 -0700 Received: (from majordom@localhost) by seti1.setileague.org (8.9.3 (PHNE_24419+JAGae58098)/8.9.3) id KAA06301 for public-list; Wed, 12 Apr 2006 10:48:11 -0400 (EDT) X-Authentication-Warning: seti1.setileague.org: majordom set sender to owner-public@seti1.setileague.org using -f Received: from hotmail.com (bay114-f23.bay114.hotmail.com [65.54.169.33]) by seti1.setileague.org (8.9.3 (PHNE_24419+JAGae58098)/8.9.3) with ESMTP id KAA06297; Wed, 12 Apr 2006 10:48:09 -0400 (EDT) Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Wed, 12 Apr 2006 07:47:37 -0700 Message-ID: Received: from 65.54.169.200 by by114fd.bay114.hotmail.msn.com with HTTP; Wed, 12 Apr 2006 14:47:34 GMT X-Originating-IP: [24.39.94.195] X-Originating-Email: [ljk4@msn.com] X-Sender: ljk4@msn.com From: "LARRY KLAES" To: public@setileague.org Subject: SETI public: Planetary Society Opens Earth's First Dedicated Optical SETI Telescope Date: Wed, 12 Apr 2006 10:47:34 -0400 Mime-Version: 1.0 Content-Type: text/plain; format=flowed X-OriginalArrivalTime: 12 Apr 2006 14:47:37.0440 (UTC) FILETIME=[0A8A6E00:01C65E40] Sender: owner-public@setileague.org Precedence: bulk Planetary Society Opens World's First Dedicated Optical SETI Telescope New Search for Extraterrestrial Intelligence Begins Pasadena, CA, —Today, April 11, 2006, The Planetary Society dedicated a new optical telescope at an observatory in Harvard, Massachusetts -- one designed solely to search for light signals from alien civilizations. Read more. Opening ceremonies for The Planetary Society's Optical SETI Telescope featured Project Director Paul Horowitz of Harvard University; Planetary Society Chairman Neil deGrasse Tyson, director of New York's Hayden Planetarium; and Society Executive Director Louis Friedman. "With the launch of The Planetary Society's Optical SETI Telescope," said Friedman, "we are proud to be part of a new voyage of discovery with this great Harvard team." The new telescope is the first dedicated optical SETI telescope in the world. Its 72-inch primary mirror is larger than that of any optical telescope in the U.S. east of the Mississippi River. Under the direction of Horowitz and his team, the optical SETI telescope will conduct a year round, all-sky survey, scanning the entire swath of our Milky Way galaxy visible in the northern hemisphere. Full article here: http://planetary.org/about/press/releases/2006/0411_Planetary_Society_Opens_Worlds_First.html Looking for alien lasers, not radios NewScientist.com news service April 11, 2006 ************************* The first optical telescope dedicated to the hunt for alien signals, the Planetary Society's Optical SETI (OSETI) telescope at Harvard's Oak Ridge Observatory, has opened. Once running, OSETI's processors will carry out a trillion measurements per second, in a year-round survey of the sky. It will be able to pick out flashes of light that are... http://www.kurzweilai.net/email/newsRedirect.html?newsID=5458&m=7610 Harvard's new telescope to boost search for alien life Will scan heavens for flashes of light By Douglas Belkin, Globe Staff | April 12, 2006 To quote: Horowitz compared the previous generation of the Optical Search for Extra-Terrestrial Intelligence, or OSETI, to searching the skies through a soda straw -- viewing only a very narrow spot of the heavens at once. This telescope, built for about $400,000, scans a broad line in the sky. As the Earth moves, the stars pass through that line. In about 200 nights the scope can observe the entire sky visible from the northern hemisphere. The pace of observation: 100,000 times faster than any previous scope. To analyze the massive amount of data being sucked in through the scope's 72-inch mirror, a team of graduate and undergraduate students built a computer able to wade through 1 trillion bits of information per second -- about as much information as is contained in every book in the Library of Congress. ''The technology is absolutely on the cutting edge," said Louis Friedman, executive director of the Planetary Society, a nonprofit group of scientists and space enthusiasts that funded the telescope. ''It feels like the Wright brothers working out of their bike shop; they're using chips never seen before." Friedman compared building the scope to launching a space ship. The stakes, he said, could not be higher. Full article here: http://www.boston.com/news/education/higher/articles/2006/04/12/harvards_new_telescope_to_boost_search_for_alien_life/ From owner-public@setileague.org Wed Apr 12 08:17:52 2006 X-Spam-Checker-Version: SpamAssassin 3.1.0 (2005-09-13) on Sentry.net X-Spam-Level: X-Spam-Status: No, score=-2.6 required=5.0 tests=AWL,BAYES_00, MSGID_FROM_MTA_HEADER autolearn=unavailable version=3.1.0 Received: from seti1.setileague.org (seti1.setileague.org [204.176.91.10]) by Sentry.net (8.13.6/8.13.3) with ESMTP id k3CFHpN7008524 for ; Wed, 12 Apr 2006 08:17:51 -0700 Received: (from majordom@localhost) by seti1.setileague.org (8.9.3 (PHNE_24419+JAGae58098)/8.9.3) id LAA06906 for public-list; Wed, 12 Apr 2006 11:08:14 -0400 (EDT) X-Authentication-Warning: seti1.setileague.org: majordom set sender to owner-public@seti1.setileague.org using -f Received: from hotmail.com (bay114-f21.bay114.hotmail.com [65.54.169.31]) by seti1.setileague.org (8.9.3 (PHNE_24419+JAGae58098)/8.9.3) with ESMTP id LAA06902; Wed, 12 Apr 2006 11:08:12 -0400 (EDT) Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Wed, 12 Apr 2006 08:07:40 -0700 Message-ID: Received: from 65.54.169.200 by by114fd.bay114.hotmail.msn.com with HTTP; Wed, 12 Apr 2006 15:07:36 GMT X-Originating-IP: [24.39.94.195] X-Originating-Email: [ljk4@msn.com] X-Sender: ljk4@msn.com From: "LARRY KLAES" To: public@setileague.org Subject: SETI public: An Observational Test for the Anthropic Origin of the Cosmological Constant Date: Wed, 12 Apr 2006 11:07:36 -0400 Mime-Version: 1.0 Content-Type: text/plain; format=flowed X-OriginalArrivalTime: 12 Apr 2006 15:07:40.0873 (UTC) FILETIME=[D7D7BB90:01C65E42] Sender: owner-public@setileague.org Precedence: bulk Astrophysics, abstract astro-ph/0604242 From: Avi Loeb [view email] Date: Tue, 11 Apr 2006 15:55:56 GMT (37kb) An Observational Test for the Anthropic Origin of the Cosmological Constant Authors: Abraham Loeb (Harvard) Comments: 5 pages, submitted to JCAP The existence of multiple regions of space beyond the observable Universe (within the so-called "multiverse") where the vacuum energy density takes different values, has been postulated as an explanation for the low non-zero value observed for it in our Universe. It is often argued that our existence pre-selects regions where the cosmological constant is sufficiently small to allow galaxies like the Milky Way to form and intelligent life to emerge. Here we propose a simple empirical test for this anthropic argument within the boundaries of the observable Universe. We make use of the fact that dwarf galaxies formed in our Universe at redshifts as high as z~10 when the mean matter density was larger by a factor of ~10^3 than today. Existing technology enables to check whether planets form in nearby dwarf galaxies and globular clusters by searching for microlensing or transit events of background stars. The oldest of these nearby systems may have formed at z~10. If planets are as common per stellar mass in these descendents as they are in the Milky Way galaxy, then the anthropic argument would be weakened considerably since planets could have formed in our Universe even if the cosmological constant was three orders of magnitude larger than observed. For a flat probability distribution, this would imply that the probability for us to reside in a region where the cosmological constant obtains its observed value is lower than \~10^{-3}. A precise version of the anthropic argument could then be ruled-out at a confidence level of ~99.9%, which constitutes a satisfactory measure of a good experimental test. http://arxiv.org/abs/astro-ph/0604242 From owner-public@setileague.org Wed Apr 12 12:55:44 2006 X-Spam-Checker-Version: SpamAssassin 3.1.0 (2005-09-13) on Sentry.net X-Spam-Level: X-Spam-Status: No, score=-2.6 required=5.0 tests=AWL,BAYES_00, MSGID_FROM_MTA_HEADER autolearn=unavailable version=3.1.0 Received: from seti1.setileague.org (seti1.setileague.org [204.176.91.10]) by Sentry.net (8.13.6/8.13.3) with ESMTP id k3CJtiwi013445 for ; Wed, 12 Apr 2006 12:55:44 -0700 Received: (from majordom@localhost) by seti1.setileague.org (8.9.3 (PHNE_24419+JAGae58098)/8.9.3) id PAA14396 for public-list; Wed, 12 Apr 2006 15:49:21 -0400 (EDT) X-Authentication-Warning: seti1.setileague.org: majordom set sender to owner-public@seti1.setileague.org using -f Received: from hotmail.com (bay114-f34.bay114.hotmail.com [65.54.169.44]) by seti1.setileague.org (8.9.3 (PHNE_24419+JAGae58098)/8.9.3) with ESMTP id PAA14392; Wed, 12 Apr 2006 15:49:18 -0400 (EDT) Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Wed, 12 Apr 2006 12:48:47 -0700 Message-ID: Received: from 65.54.169.200 by by114fd.bay114.hotmail.msn.com with HTTP; Wed, 12 Apr 2006 19:48:42 GMT X-Originating-IP: [24.39.94.195] X-Originating-Email: [ljk4@msn.com] X-Sender: ljk4@msn.com From: "LARRY KLAES" To: public@setileague.org Subject: SETI public: 2 papers, including Detection Limits from the McDonald Observatory Planet Search Date: Wed, 12 Apr 2006 15:48:42 -0400 Mime-Version: 1.0 Content-Type: text/plain; format=flowed X-OriginalArrivalTime: 12 Apr 2006 19:48:47.0458 (UTC) FILETIME=[1D1C5C20:01C65E6A] Sender: owner-public@setileague.org Precedence: bulk Paper: astro-ph/0604171 Date: Fri, 7 Apr 2006 16:51:47 GMT (368kb) Title: Detection Limits from the McDonald Observatory Planet Search Program Authors: Robert A. Wittenmyer, Michael Endl, William D. Cochran, Artie P. Hatzes, G.A.H. Walker, S.L.S. Yang, Diane B. Paulson Comments: 21 pages, 15 figures, accepted for publication in AJ \\ Based on the long-term radial-velocity surveys carried out with the McDonald Observatory 2.7m Harlan J. Smith Telescope from 1988 to the present, we derive upper limits to long-period giant planet companions for 31 nearby stars. Data from three phases of the McDonald Observatory 2.7m planet-search program have been merged together and for 17 objects, data from the pioneering Canada-France-Hawaii Telescope (CFHT) radial-velocity program have also been included in the companion-limits determination. For those 17 objects, the baseline of observations is in excess of 23 years, enabling the detection or exclusion of giant planets in orbits beyond 8 AU. We also consider the possibility of eccentric orbits in our computations. At an orbital separation of 5.2 AU, we can exclude on average planets of M sin i > 2.0+/-1.1 Mjup (e=0) and M sin i > 4.0+/-2.8 Mjup (e=0.6) for 25 of the 31 stars in this survey. However, we are not yet able to rule out "true Jupiters," i.e. planets of M sin i ~ 1 Mjup in 5.2 AU orbits. These limits are of interest for the Space Interferometry Mission (SIM), Terrestrial Planet Finder (TPF), and Darwin missions which will search for terrestrial planets orbiting nearby stars, many of which are included in this work. \\ ( http://arXiv.org/abs/astro-ph/0604171 , 368kb) Astrophysics, abstract astro-ph/0604241 From: Thomas Dall Dr. [view email] Date: Tue, 11 Apr 2006 14:13:44 GMT (137kb) Bisectors of the cross-correlation function applied to stellar spectra. Discriminating stellar activity, oscillations and planets Authors: T. H. Dall (1), N. C. Santos (2 and 3), T. Arentoft (4), T. R. Bedding (5), H. Kjeldsen (4) ((1) ESO, (2) Observatorio Astronomico de Lisboa, (3) Observatoire de Geneve, (4) University of Aarhus, (5) University of Sydney) Comments: 10 pages, 13 figures. Accepted for publication in A&A Aims: We investigate whether bisectors derived from cross-correlation functions (CCF) of single-exposure spectra can be used to provide information on stellar atmospheres, and whether they can be used to discriminate between radial velocity changes caused by planets, magnetic activity and oscillations. Methods: Using a sample of bright stars observed with the HARPS spectrograph, we examine the shapes of the bisectors of individual strong spectral lines in summed spectra, comparing with similar studies in the literature. Moreover, we examine four different quantitative CCF bisector measures for correlations with radial velocity and stellar parameters. Results: We show that CCF bisector measures can be used for quantitative analysis, employing both the absolute values and the variations. From absolute values, log g and absolute magnitude can be approximated, and from the correlations with radial velocity one can distinguish between magnetic activity, oscillations and orbiting planets as the probable cause of radial velocity variations. We confirm that different isolated spectral lines show different bisector shapes, even between lines of the same element, calling for caution in trying to derive global stellar properties from the bisector of a CCF. For the active star HR 1362 we suggest from the bisector shape an extra photospheric heating caused by the chromosphere of several hundred degrees. We confirm the fill-in of spectral lines of the Sun taken on the daylight sky caused by Rayleigh-Brillouin and aerosol scattering, and we show for the first time that the fill-in has an asymmetric component. http://arxiv.org/abs/astro-ph/0604241 From owner-public@setileague.org Thu Apr 13 09:10:15 2006 X-Spam-Checker-Version: SpamAssassin 3.1.0 (2005-09-13) on Sentry.net X-Spam-Level: X-Spam-Status: No, score=-2.6 required=5.0 tests=AWL,BAYES_00, MSGID_FROM_MTA_HEADER autolearn=unavailable version=3.1.0 Received: from seti1.setileague.org (seti1.setileague.org [204.176.91.10]) by Sentry.net (8.13.6/8.13.3) with ESMTP id k3DGAF50003946 for ; Thu, 13 Apr 2006 09:10:15 -0700 Received: (from majordom@localhost) by seti1.setileague.org (8.9.3 (PHNE_24419+JAGae58098)/8.9.3) id MAA16735 for public-list; Thu, 13 Apr 2006 12:00:03 -0400 (EDT) X-Authentication-Warning: seti1.setileague.org: majordom set sender to owner-public@seti1.setileague.org using -f Received: from hotmail.com (bay114-f30.bay114.hotmail.com [65.54.169.40]) by seti1.setileague.org (8.9.3 (PHNE_24419+JAGae58098)/8.9.3) with ESMTP id MAA16731; Thu, 13 Apr 2006 12:00:01 -0400 (EDT) Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Thu, 13 Apr 2006 08:59:30 -0700 Message-ID: Received: from 65.54.169.200 by by114fd.bay114.hotmail.msn.com with HTTP; Thu, 13 Apr 2006 15:59:28 GMT X-Originating-IP: [24.39.94.195] X-Originating-Email: [ljk4@msn.com] X-Sender: ljk4@msn.com From: "LARRY KLAES" To: public@setileague.org Subject: SETI public: Lunar Rocks Suggest Meteorite Shower Date: Thu, 13 Apr 2006 11:59:28 -0400 Mime-Version: 1.0 Content-Type: text/plain; format=flowed X-OriginalArrivalTime: 13 Apr 2006 15:59:30.0023 (UTC) FILETIME=[3F741F70:01C65F13] Sender: owner-public@setileague.org Precedence: bulk MOON DAILY - Lunar Rocks Suggest Meteorite Shower http://www.spacedaily.com/reports/Lunar_Rocks_Suggest_Meteorite_Shower.html Corvallis OR (SPX) Apr 13, 2006 - New age measurements of lunar rocks returned by the Apollo space missions have revealed that a surprising number of the rocks show signs of melting about 3.9 billion years ago, suggesting that the moon - and its nearby neighbor Earth - were bombarded by a series of large meteorites at that time. To quote: What is particularly intriguing, Duncan says, is that this apparent spike in meteorite activity took place about 3.8 to 4 billion years ago - an era that roughly coincides with when scientists believe life first began on Earth, as evidenced by the fossil record of primitive one-cell bacteria. It is possible that life was introduced to Earth from one of these meteorites, Duncan said. Or it could have developed spontaneously once the bombardment subsided, or developed beneath the ocean near life-nurturing hydrothermal vents. The lack of evidence on Earth makes the analysis of moon rocks much more compelling. The meteorite activity that bombarded the moon likely struck our planet as well. From owner-public@setileague.org Thu Apr 13 20:03:01 2006 X-Spam-Checker-Version: SpamAssassin 3.1.0 (2005-09-13) on Sentry.net X-Spam-Level: X-Spam-Status: No, score=-2.6 required=5.0 tests=AWL,BAYES_00, MSGID_FROM_MTA_HEADER autolearn=unavailable version=3.1.0 Received: from seti1.setileague.org (seti1.setileague.org [204.176.91.10]) by Sentry.net (8.13.6/8.13.3) with ESMTP id k3E330gY016926 for ; Thu, 13 Apr 2006 20:03:01 -0700 Received: (from majordom@localhost) by seti1.setileague.org (8.9.3 (PHNE_24419+JAGae58098)/8.9.3) id WAA04929 for public-list; Thu, 13 Apr 2006 22:57:31 -0400 (EDT) X-Authentication-Warning: seti1.setileague.org: majordom set sender to owner-public@seti1.setileague.org using -f Received: from hotmail.com (bay114-f19.bay114.hotmail.com [65.54.169.29]) by seti1.setileague.org (8.9.3 (PHNE_24419+JAGae58098)/8.9.3) with ESMTP id WAA04925; Thu, 13 Apr 2006 22:57:29 -0400 (EDT) Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Thu, 13 Apr 2006 19:56:58 -0700 Message-ID: Received: from 65.54.169.200 by by114fd.bay114.hotmail.msn.com with HTTP; Fri, 14 Apr 2006 02:56:56 GMT X-Originating-IP: [129.44.213.74] X-Originating-Email: [ljk4@msn.com] X-Sender: ljk4@msn.com From: "LARRY KLAES" To: public@setileague.org Subject: SETI public: A Warm Saturn Around 51 Pegasi? Date: Thu, 13 Apr 2006 22:56:56 -0400 Mime-Version: 1.0 Content-Type: text/plain; format=flowed X-OriginalArrivalTime: 14 Apr 2006 02:56:58.0197 (UTC) FILETIME=[1865C850:01C65F6F] Sender: owner-public@setileague.org Precedence: bulk http://www.centauri-dreams.org/?p=619 A Warm ‘Saturn’ Around 51 Peg? April 12, 2006 A brief heads-up on the ongoing work on 51 Peg, which Greg Laughlin and team are studying to see if additional planets can be found in the voluminous data. 51 Peg, remember, was the first example of an extrasolar planet being found around a main-sequence star. The dataset goes back ten years and is far more extensive than those used in most other planet discoveries via radial velocity measurements. Using the Systemic Console, Laughlin sees evidence of a possible second planetary companion to 51 Peg, and it’s a beauty: a Saturn-class world in an Earth-like orbit. “Does it really exist, this room-temperature Saturn?,” Laughlin writes. “Is it really out there? Do furious anticyclonic storms spin through its cloud bands? Does it have rings? Does it loom as enormous white crescent in the deep blue twilight sky of a habitable moon?” 51 Peg c is a breaktaking, beautiful thought, but Laughlin is quick to caution that this cannot yet be described as an exoplanet discovery. Plenty of work remains to be done, and it is possible that seasonal effects having to do with the telescope used in the observation might be one alternative explanation among several. So think of that ‘room temperature Saturn’ as a gorgeous concept that may or may not pan out, but do read the Systemic entries on it as the work continues. And bear in mind this other Laughlin thought: “I have no doubt that there are many other exciting, undiscovered curiosities lurking in the published radial velocity data sets.” Not to mention the fact that our data keep accumulating. As I seem to say every month or so, what a time to be alive and doing science! From owner-public@setileague.org Thu Apr 13 20:06:48 2006 X-Spam-Checker-Version: SpamAssassin 3.1.0 (2005-09-13) on Sentry.net X-Spam-Level: X-Spam-Status: No, score=-2.6 required=5.0 tests=AWL,BAYES_00, MSGID_FROM_MTA_HEADER autolearn=unavailable version=3.1.0 Received: from seti1.setileague.org (seti1.setileague.org [204.176.91.10]) by Sentry.net (8.13.6/8.13.3) with ESMTP id k3E36mhe017016 for ; Thu, 13 Apr 2006 20:06:48 -0700 Received: (from majordom@localhost) by seti1.setileague.org (8.9.3 (PHNE_24419+JAGae58098)/8.9.3) id WAA05031 for public-list; Thu, 13 Apr 2006 22:59:25 -0400 (EDT) X-Authentication-Warning: seti1.setileague.org: majordom set sender to owner-public@seti1.setileague.org using -f Received: from hotmail.com (bay114-f25.bay114.hotmail.com [65.54.169.35]) by seti1.setileague.org (8.9.3 (PHNE_24419+JAGae58098)/8.9.3) with ESMTP id WAA05027; Thu, 13 Apr 2006 22:59:23 -0400 (EDT) Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Thu, 13 Apr 2006 19:58:53 -0700 Message-ID: Received: from 65.54.169.200 by by114fd.bay114.hotmail.msn.com with HTTP; Fri, 14 Apr 2006 02:58:50 GMT X-Originating-IP: [129.44.213.74] X-Originating-Email: [ljk4@msn.com] X-Sender: ljk4@msn.com From: "LARRY KLAES" To: public@setileague.org Subject: SETI public: Circumstellar material in the Vega inner system revealed by CHARA/FLUOR Date: Thu, 13 Apr 2006 22:58:50 -0400 Mime-Version: 1.0 Content-Type: text/plain; format=flowed X-OriginalArrivalTime: 14 Apr 2006 02:58:53.0073 (UTC) FILETIME=[5CDE7810:01C65F6F] Sender: owner-public@setileague.org Precedence: bulk Paper: astro-ph/0604260 Date: Wed, 12 Apr 2006 08:12:19 GMT (87kb) Title: Circumstellar material in the Vega inner system revealed by CHARA/FLUOR Authors: O. Absil, E. di Folco, A. Merand, J.-C. Augereau, V. Coude du Foresto, J. P. Aufdenberg, P. Kervella, S. T. Ridgway, D. H. Berger, T. A. ten Brummelaar, J. Sturmann, L. Sturmann, N. H. Turner, and H. A. McAlister Comments: A&A, accepted -- Press release available at http://www2.cnrs.fr/presse/communique/848.htm DOI: 10.1051/0004-6361:20054522 \\ Only a handful of debris disks have been imaged up to now. Due to the need for high dynamic range and high angular resolution, very little is known about the inner planetary region, where small amounts of warm dust are expected to be found. We investigate the close neighbourhood of Vega with the help of infrared stellar interferometry and estimate the integrated K-band flux originating from the central 8 AU of the debris disk. We performed precise visibility measurements at both short (~30 m) and long (~150 m) baselines with the FLUOR beam-combiner installed at the CHARA Array (Mt Wilson, California) in order to separately resolve the emissions from the extended debris disk (short baselines) and from the stellar photosphere (long baselines). After revising Vega's K-band angular diameter (3.202+/-0.005 mas), we show that a significant deficit in squared visibility (1.88+/-0.34%) is detected at short baselines with respect to the best-fit uniform disk stellar model. This deficit can be either attributed to the presence of a low-mass stellar companion around Vega, or as the signature of the thermal and scattered emissions from the debris disk. We show that the presence of a close companion is highly unlikely, as well as other possible perturbations (stellar morphology, calibration), and deduce that we have most probably detected the presence of dust in the close neighbourhood of Vega. The resulting flux ratio between the stellar photosphere and the debris disk amounts to 1.29+/-0.19% within the FLUOR field-of-view (~7.8 AU). Finally, we complement our K-band study with archival photometric and interferometric data in order to evaluate the main physical properties of the inner dust disk. The inferred properties suggest that the Vega system could be currently undergoing major dynamical perturbations. \\ ( http://arXiv.org/abs/astro-ph/0604260 , 87kb) From owner-public@setileague.org Sat Apr 15 00:56:24 2006 X-Spam-Checker-Version: SpamAssassin 3.1.0 (2005-09-13) on Sentry.net X-Spam-Level: X-Spam-Status: No, score=-2.5 required=5.0 tests=AWL,BAYES_00, MSGID_FROM_MTA_HEADER,OPTING_OUT_CAPS autolearn=unavailable version=3.1.0 Received: from seti1.setileague.org (seti1.setileague.org [204.176.91.10]) by Sentry.net (8.13.6/8.13.3) with ESMTP id k3F7uOb0014553 for ; Sat, 15 Apr 2006 00:56:24 -0700 Received: (from majordom@localhost) by seti1.setileague.org (8.9.3 (PHNE_24419+JAGae58098)/8.9.3) id VAA11525 for public-list; Fri, 14 Apr 2006 21:28:43 -0400 (EDT) X-Authentication-Warning: seti1.setileague.org: majordom set sender to owner-public@seti1.setileague.org using -f Received: from hotmail.com (bay114-f8.bay114.hotmail.com [65.54.169.18]) by seti1.setileague.org (8.9.3 (PHNE_24419+JAGae58098)/8.9.3) with ESMTP id VAA11519; Fri, 14 Apr 2006 21:28:40 -0400 (EDT) Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Fri, 14 Apr 2006 18:28:08 -0700 Message-ID: Received: from 65.54.169.200 by by114fd.bay114.hotmail.msn.com with HTTP; Sat, 15 Apr 2006 01:28:03 GMT X-Originating-IP: [70.16.62.65] X-Originating-Email: [ljk4@msn.com] X-Sender: ljk4@msn.com From: "LARRY KLAES" To: public@setileague.org Subject: SETI public: FW: Sky & Telescope's Weekly Bulletin for April 14 Date: Fri, 14 Apr 2006 21:28:03 -0400 Mime-Version: 1.0 Content-Type: text/plain; format=flowed X-OriginalArrivalTime: 15 Apr 2006 01:28:08.0437 (UTC) FILETIME=[DA06B250:01C6602B] Sender: owner-public@setileague.org Precedence: bulk >From: wnb@SkyandTelescope.com >To: "ljk4@msn.com" >Subject: Sky & Telescope's Weekly Bulletin for April 14 >Date: Fri, 14 Apr 2006 15:12:22 -0400 > >================================================== >SKY & TELESCOPE'S WEEKLY BULLETIN - April 14, 2006 >================================================== > >Welcome to SKY & TELESCOPE's Weekly Bulletin. Images, the full stories, >abridged here, and other enhancements are on our Web site, at: >http://SkyandTelescope.com > >**If you are unable to click on the links in this newsletter, please copy >and paste the links into your Web browser** > >Use this link to change your format to HTML: >http://skyandtelescope.com/enewsletterpro/members.asp?Task=ChangeToHTML&SubscriberID=124619&Email=ljk4%40msn%2Ecom&S=1 > >================ >THIS WEEK'S NEWS >================ > >A Big New Step in the Search for ET > >April 11, 2006 | Under a sunny blue sky this afternoon, a crowd of 75 >scientists, engineers, distinguished officials, and space enthusiasts >cheered and raised champaign glasses as Harvard engineer Paul Horowitz and >his wife cut a big red ribbon on the steps of a squat wooden building. >Poking skyward from behind the building's roll-off roof was an >unrecognizable structure wrapped in reflective gold fabric. It was the >newest and largest optical telescope east of the Mississippi. And it >represents the next step in what could be humanity's grandest scientific >quest, though perhaps the one with the slimmest odds of success.... > > > http://SkyandTelescope.com/news/article_1712_1.asp > >------------------------------------------------------------------------ > >Hubble View Downsizes "10th Planet" > >April 12, 2006 | When the discovery of the giant Kuiper Belt object 2003 >UB313 was announced last year, astronomers estimated its diameter to be >roughly a third greater than that of Pluto. Subsequent infrared scrutiny by >the Spitzer Space Telescope and a groundbased radio telescope seemingly >confirmed that the object had a diameter near 3,000 kilometers (with an >uncertainty of roughly 400 km). But Hubble Space Telescope images obtained >last December barely resolved the object, and a careful analysis shows that >it is likely 2,400 ± 100 km across -- just 5% bigger than Pluto.... > > > http://SkyandTelescope.com/news/article_1711_1.asp > >------------------------------------------------------------------------ > >A Supernova's Backwash May Form Planets > >For many years astronomers have theorized that when massive stars explode >as supernovae, some of the material won't be ejected with enough speed to >escape. This material falls back and will either crash into the dying star >or form a disk around it. > >Now, thanks to NASA's Spitzer Space Telescope, scientists have their first >observational evidence that a supernova fallback process occurs in >nature.... > > > http://SkyandTelescope.com/news/article_1710_1.asp > >=========================== >OBSERVING - SKY AT A GLANCE >=========================== > >April 14 – April 22 > >Drop in on Jupiter (magnitude –2.4, in Libra). It rises in the >east-southeast shortly after dark and is highest in the south around 1 a.m. >Be sure to check for its new feature, "Red Spot Junior." > >http://SkyandTelescope.com/observing/ataglance/article_110_1.asp > >================================== >OBSERVING - THIS WEEK'S HIGHLIGHTS >================================== > >Update on Comet Schwassmann-Wachmann 3: This periodic comet, due to reach >4th magnitude in May, has shed more fragments. Its two main pieces are 9th >magnitude in the evening sky. > >http://SkyandTelescope.com/observing/ > >=========================== >SHOP AT SKY (Advertisement) >=========================== > >Atlas of the Moon >By Antonín Rükl > >This must-have lunar atlas is perfect for beginning Moon-gazers and expert >lunar observers alike. Master lunar cartographer Antonín Rükl's has crafted >exquisite maps, and comprehensive lists of lunar formations and sights. >Start exploring today! > >Atlas of the Moon $44.95, plus shipping: > >http://www.ShopatSky.com/index.asp?PageAction=VIEWPROD&ProdID=232 > >----------------------------------------------------------- > >The Modern Moon: A Personal View >By Charles A. Wood > >The Modern Moon: A Personal View is an authoritative guidebook that tells >readers both what to look for and why to look. Set up your telescope and >let Wood unravel the Moon's complex past as you gaze at lunar vistas. > >The Modern Moon $44.95, plus shipping: > >http://www.ShopatSky.com/index.asp?PageAction=VIEWPROD&ProdID=220&utm_source=E-mail&utm_medium=weekly%2Bbulletin&utm_campaign=Modern%2BMoon > >========================================================== > >Copyright 2006 Sky Publishing Corp. S&T's Weekly Bulletin is provided as a >free service to the astronomical community by the editors of SKY & >TELESCOPE magazine. Widespread distribution is encouraged as long as our >copyright notice is included, with the words "used by permission." This >bulletin may not be published in any other form without written permission >from Sky Publishing; send an email to permissions@skyandtelescope.com or >call +1 617-864-7360. More astronomy news is available on our Web site at >http://SkyandTelescope.com/news/. > >To change the address where you receive S&T's Weekly Bulletin, go to: >http://SkyandTelescope.com/article_1680_1.asp > >To unsubscribe from S&T's Weekly Bulletin, go to: >http://skyandtelescope.com/enewsletterpro/members.asp?Task=OptOut&SubscriberID=124619&Email=ljk4%40msn%2Ecom&S=1 > >========================================================== From owner-public@setileague.org Sat Apr 15 01:31:21 2006 X-Spam-Checker-Version: SpamAssassin 3.1.0 (2005-09-13) on Sentry.net X-Spam-Level: X-Spam-Status: No, score=-2.6 required=5.0 tests=BAYES_00 autolearn=ham version=3.1.0 Received: from seti1.setileague.org (seti1.setileague.org [204.176.91.10]) by Sentry.net (8.13.6/8.13.3) with ESMTP id k3F8VKFp015046 for ; Sat, 15 Apr 2006 01:31:20 -0700 Received: (from majordom@localhost) by seti1.setileague.org (8.9.3 (PHNE_24419+JAGae58098)/8.9.3) id EAA23000 for public-list; Sat, 15 Apr 2006 04:24:58 -0400 (EDT) X-Authentication-Warning: seti1.setileague.org: majordom set sender to owner-public@seti1.setileague.org using -f Received: from mail.phonecoop.coop (mail.phonecoop.coop [82.138.229.91]) by seti1.setileague.org (8.9.3 (PHNE_24419+JAGae58098)/8.9.3) with ESMTP id EAA22996 for ; Sat, 15 Apr 2006 04:24:55 -0400 (EDT) Received: from [82.138.218.195] (port=56192 helo=[192.168.0.4]) by mail.phonecoop.coop with esmtp (Exim 4.60) (envelope-from ) id 1FUg4v-00044M-SZ for public@setileague.org; Sat, 15 Apr 2006 09:24:25 +0100 Mime-Version: 1.0 (Apple Message framework v749.3) Content-Transfer-Encoding: 7bit Message-Id: Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed To: public@setileague.org From: William Edmondson Subject: SETI public: setiblog is now active Date: Sat, 15 Apr 2006 09:24:20 +0100 X-Mailer: Apple Mail (2.749.3) X-Antivirus-Scanned: Clean Sender: owner-public@setileague.org Precedence: bulk Hi folks Some while back at the turn of the year when I updated the community on my approach to SETI and the fact that I had gathered some data at Arecibo...... one of you contacted me to say that maybe a blog would be a good idea.... I thought so, and after initial enthusiasm, and some delays (I have to teach and do tons of stuff....) I now have a running blog. It is open access - you can respond to items posted using the comment tab at the bottom, although I haven't worked out why it does not increment the counter when people have commented (as one has already...). Have fun.... and if there is material that you want posted I can do that.... I plan to attend to it every week or so..... and put up new data- processing stuff when I've done more... Cheers William From owner-public@setileague.org Sat Apr 15 14:58:28 2006 X-Spam-Checker-Version: SpamAssassin 3.1.0 (2005-09-13) on Sentry.net X-Spam-Level: X-Spam-Status: No, score=-2.6 required=5.0 tests=AWL,BAYES_00, MSGID_FROM_MTA_HEADER autolearn=unavailable version=3.1.0 Received: from seti1.setileague.org (seti1.setileague.org [204.176.91.10]) by Sentry.net (8.13.6/8.13.3) with ESMTP id k3FLwS5Z028782 for ; Sat, 15 Apr 2006 14:58:28 -0700 Received: (from majordom@localhost) by seti1.setileague.org (8.9.3 (PHNE_24419+JAGae58098)/8.9.3) id RAA14802 for public-list; Sat, 15 Apr 2006 17:51:11 -0400 (EDT) X-Authentication-Warning: seti1.setileague.org: majordom set sender to owner-public@seti1.setileague.org using -f Received: from hotmail.com (bay114-f33.bay114.hotmail.com [65.54.169.43]) by seti1.setileague.org (8.9.3 (PHNE_24419+JAGae58098)/8.9.3) with ESMTP id RAA14794; Sat, 15 Apr 2006 17:51:09 -0400 (EDT) Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Sat, 15 Apr 2006 14:50:37 -0700 Message-ID: Received: from 65.54.169.200 by by114fd.bay114.hotmail.msn.com with HTTP; Sat, 15 Apr 2006 21:50:35 GMT X-Originating-IP: [71.240.242.237] X-Originating-Email: [ljk4@msn.com] X-Sender: ljk4@msn.com From: "LARRY KLAES" To: public@setileague.org Subject: SETI public: New Web site - William Edmondson's Pulsars as SETI Beacons Date: Sat, 15 Apr 2006 17:50:35 -0400 Mime-Version: 1.0 Content-Type: text/plain; format=flowed X-OriginalArrivalTime: 15 Apr 2006 21:50:37.0876 (UTC) FILETIME=[A1B2DF40:01C660D6] Sender: owner-public@setileague.org Precedence: bulk William Edmondson has created a setiblog for updates and information on his research into pulsars (rapidly rotating neutron stars) as beacons for SETI. The Web site URL: http://www.cs.bham.ac.uk/~whe/setiblog.html >From the introduction: SETIblog This blog is about the analysis of 3TB of radio-telescope data collected at Arecibo as part of a Search for Extra-Terrestrial Intelligence using a new targeting strategy reported in a journal article. The processing started shortly before Christmas 2005. Exploratory work of familiarization with the data format and some processing algorithms will eventually be followed by detailed reports on the data for each star studied. The Web site has links to his papers on the subject as well. Larry From owner-public@setileague.org Sat Apr 15 15:35:07 2006 X-Spam-Checker-Version: SpamAssassin 3.1.0 (2005-09-13) on Sentry.net X-Spam-Level: X-Spam-Status: No, score=-2.6 required=5.0 tests=BAYES_00 autolearn=ham version=3.1.0 Received: from seti1.setileague.org (seti1.setileague.org [204.176.91.10]) by Sentry.net (8.13.6/8.13.3) with ESMTP id k3FMZ6q2029376 for ; Sat, 15 Apr 2006 15:35:06 -0700 Received: (from majordom@localhost) by seti1.setileague.org (8.9.3 (PHNE_24419+JAGae58098)/8.9.3) id SAA15975 for public-list; Sat, 15 Apr 2006 18:30:43 -0400 (EDT) X-Authentication-Warning: seti1.setileague.org: majordom set sender to owner-public@seti1.setileague.org using -f Received: from mail.phonecoop.coop (mail.phonecoop.coop [82.138.229.91]) by seti1.setileague.org (8.9.3 (PHNE_24419+JAGae58098)/8.9.3) with ESMTP id SAA15971 for ; Sat, 15 Apr 2006 18:30:41 -0400 (EDT) Received: from [82.138.218.195] (port=56413 helo=[192.168.0.3]) by mail.phonecoop.coop with esmtp (Exim 4.60) (envelope-from ) id 1FUtHU-0006HC-CO for public@setileague.org; Sat, 15 Apr 2006 23:30:16 +0100 Mime-Version: 1.0 (Apple Message framework v749.3) Content-Transfer-Encoding: 7bit Message-Id: Content-Type: text/plain; charset=US-ASCII; format=flowed To: public@setileague.org From: William Edmondson Subject: SETI public: setiblog Date: Sat, 15 Apr 2006 23:30:10 +0100 X-Mailer: Apple Mail (2.749.3) X-Antivirus-Scanned: Clean Sender: owner-public@setileague.org Precedence: bulk Sorry folks - what a clown you must think me.... http://www.cs.bham.ac.uk/~whe/setiblog.html William From owner-public@setileague.org Mon Apr 17 11:19:31 2006 X-Spam-Checker-Version: SpamAssassin 3.1.0 (2005-09-13) on Sentry.net X-Spam-Level: X-Spam-Status: No, score=-2.6 required=5.0 tests=AWL,BAYES_00, MSGID_FROM_MTA_HEADER autolearn=ham version=3.1.0 Received: from seti1.setileague.org (seti1.setileague.org [204.176.91.10]) by Sentry.net (8.13.6/8.13.3) with ESMTP id k3HIJVt7004451 for ; Mon, 17 Apr 2006 11:19:31 -0700 Received: (from majordom@localhost) by seti1.setileague.org (8.9.3 (PHNE_24419+JAGae58098)/8.9.3) id OAA03970 for public-list; Mon, 17 Apr 2006 14:10:33 -0400 (EDT) X-Authentication-Warning: seti1.setileague.org: majordom set sender to owner-public@seti1.setileague.org using -f Received: from hotmail.com (bay114-f20.bay114.hotmail.com [65.54.169.30]) by seti1.setileague.org (8.9.3 (PHNE_24419+JAGae58098)/8.9.3) with ESMTP id OAA03966; Mon, 17 Apr 2006 14:10:30 -0400 (EDT) Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Mon, 17 Apr 2006 11:09:59 -0700 Message-ID: Received: from 65.54.169.200 by by114fd.bay114.hotmail.msn.com with HTTP; Mon, 17 Apr 2006 18:09:55 GMT X-Originating-IP: [24.39.94.195] X-Originating-Email: [ljk4@msn.com] X-Sender: ljk4@msn.com From: "LARRY KLAES" To: public@setileague.org Subject: SETI public: 2 papers on pulsars Date: Mon, 17 Apr 2006 14:09:55 -0400 Mime-Version: 1.0 Content-Type: text/plain; format=flowed X-OriginalArrivalTime: 17 Apr 2006 18:09:59.0642 (UTC) FILETIME=[23EC2BA0:01C6624A] Sender: owner-public@setileague.org Precedence: bulk Paper: astro-ph/0604288 Date: Thu, 13 Apr 2006 01:07:47 GMT (378kb) Title: The Parkes Pulsar Timing Array Authors: R N Manchester Comments: 10 pages, in press ChJAA \\ Given sufficient sensitivity, pulsar timing observations can make a direct detection of gravitational waves passing over the Earth. Pulsar timing is most sensitive to gravitational waves with frequencies in the nanoHertz region, with the most likely astronomical sources being binary super-massive black holes in galaxy cores. The Parkes Pulsar Timing Array project uses the Parkes 64-m radio telescope to make precision timing observations of a sample of about 20 millisecond pulsars with a principal goal of making a direct detection of gravitational waves. Observations commenced about one year ago and so far sub-microsecond timing residuals have been achieved for more than half of these pulsars. New receiver and software systems are being developed with the aim of reducing these residuals to the level believed necessary for a positive detection of gravitational waves. \\ ( http://arXiv.org/abs/astro-ph/0604288 , 378kb) Paper: astro-ph/0604318 Date: Thu, 13 Apr 2006 20:36:17 GMT (94kb) Title: Chandra X-Ray Observations of Nineteen Millisecond Pulsars in the Globular Cluster 47 Tucanae Authors: Slavko Bogdanov, Jonathan E. Grindlay, Craig O. Heinke, Fernando Camilo, Paulo C. C. Freire, Werner Becker Comments: 13 pages, 6 figures, accepted for publication in the Astrophysical Journal \\ We present spectral and long-timescale variability analyses of \textit{Chandra} ACIS-S observations of the 19 millisecond pulsars (MSPs) with precisely known positions in the globular cluster 47 Tucanae. The X-ray emission of the majority of these MSPs is well described by a thermal (blackbody or neutron star hydrogen atmosphere) spectrum with a temperature $T_{\rm eff}\sim(1-3)\times10^6$ K, emission radius $R_{\rm eff}\sim0.1-3$ km, and luminosity $L_{X}\sim10^{30-31}$ ergs s$^{-1}$. For several MSPs, there is indication that a second thermal component is required, similar to what is seen in some nearby field MSPs. The radio-eclipsing binary MSPs 47 Tuc J, O, and W show a significant non-thermal component, with photon index $\Gamma\sim 1-1.5$, which may originate in an shock formed due to interaction between the relativistic pulsar wind and matter from the stellar companion. We re-examine the X-ray--spindown luminosity relation ($L_{X}-\dot{E}$) and find that due to the large uncertainties in both parameters the result is consistent with both the linear $L_{X}-\dot{E}$ relation and the flatter $L_X\propto\dot{E}^{0.5}$ predicted by polar cap heating models. In terms of X-ray properties, we find no clear systematic differences between MSPs in globular clusters and in the field of the Galaxy. \\ ( http://arXiv.org/abs/astro-ph/0604318 , 94kb) From owner-public@setileague.org Mon Apr 17 13:03:27 2006 X-Spam-Checker-Version: SpamAssassin 3.1.0 (2005-09-13) on Sentry.net X-Spam-Level: X-Spam-Status: No, score=-2.6 required=5.0 tests=AWL,BAYES_00, MSGID_FROM_MTA_HEADER autolearn=unavailable version=3.1.0 Received: from seti1.setileague.org (seti1.setileague.org [204.176.91.10]) by Sentry.net (8.13.6/8.13.3) with ESMTP id k3HK3RIG006128 for ; Mon, 17 Apr 2006 13:03:27 -0700 Received: (from majordom@localhost) by seti1.setileague.org (8.9.3 (PHNE_24419+JAGae58098)/8.9.3) id PAA07243 for public-list; Mon, 17 Apr 2006 15:57:39 -0400 (EDT) X-Authentication-Warning: seti1.setileague.org: majordom set sender to owner-public@seti1.setileague.org using -f Received: from hotmail.com (bay114-f34.bay114.hotmail.com [65.54.169.44]) by seti1.setileague.org (8.9.3 (PHNE_24419+JAGae58098)/8.9.3) with ESMTP id PAA07239; Mon, 17 Apr 2006 15:57:36 -0400 (EDT) Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Mon, 17 Apr 2006 12:57:05 -0700 Message-ID: Received: from 65.54.169.200 by by114fd.bay114.hotmail.msn.com with HTTP; Mon, 17 Apr 2006 19:57:00 GMT X-Originating-IP: [24.39.94.195] X-Originating-Email: [ljk4@msn.com] X-Sender: ljk4@msn.com From: "LARRY KLAES" To: public@setileague.org Subject: SETI public: A Scheme for Targeting Optical SETI Observations Date: Mon, 17 Apr 2006 15:57:00 -0400 Mime-Version: 1.0 Content-Type: text/plain; format=flowed X-OriginalArrivalTime: 17 Apr 2006 19:57:05.0521 (UTC) FILETIME=[1A0B7E10:01C66259] Sender: owner-public@setileague.org Precedence: bulk A Scheme for Targeting Optical SETI Observations Seth Shostak (1) and Ray Villard (2) (1) SETI Institute, Mountain View, CA (2) Space Telescope Science Institute, Baltimore, MD Abstract In optical SETI (OSETI) experiments, it is generally assumed that signals will be deliberate, narrowly targeted beacons sent by extraterrestrial societies to large numbers of candidate star systems. If this is so, then it may be unrealistic to expect a high duty cycle for the received signal. Ergo, an advantage accrues to any OSETI scheme that realistically suggests where and when to search. In this paper, we elaborate a proposal [1] for selecting regions of sky for intensive optical SETI monitoring based on characteristics of our solar system that would be visible at great distance. This can enormously lessen the amount of sky that needs to be searched. In addition, this is an attractive approach for the transmitting society because it both increases the chances of reception and provides a large reduction in energy required. With good astrometric information, the transmitter need be no more powerful than an automobile tail light. http://rayvillard.com/science_papers.htm From owner-public@setileague.org Tue Apr 18 12:09:57 2006 X-Spam-Checker-Version: SpamAssassin 3.1.0 (2005-09-13) on Sentry.net X-Spam-Level: X-Spam-Status: No, score=-2.6 required=5.0 tests=AWL,BAYES_00, MSGID_FROM_MTA_HEADER autolearn=ham version=3.1.0 Received: from seti1.setileague.org (seti1.setileague.org [204.176.91.10]) by Sentry.net (8.13.6/8.13.3) with ESMTP id k3IJ9ubQ030774 for ; Tue, 18 Apr 2006 12:09:56 -0700 Received: (from majordom@localhost) by seti1.setileague.org (8.9.3 (PHNE_24419+JAGae58098)/8.9.3) id PAA18935 for public-list; Tue, 18 Apr 2006 15:05:30 -0400 (EDT) X-Authentication-Warning: seti1.setileague.org: majordom set sender to owner-public@seti1.setileague.org using -f Received: from hotmail.com (bay114-f31.bay114.hotmail.com [65.54.169.41]) by seti1.setileague.org (8.9.3 (PHNE_24419+JAGae58098)/8.9.3) with ESMTP id PAA18930 for ; Tue, 18 Apr 2006 15:05:27 -0400 (EDT) Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Tue, 18 Apr 2006 12:04:56 -0700 Message-ID: Received: from 65.54.169.200 by by114fd.bay114.hotmail.msn.com with HTTP; Tue, 18 Apr 2006 19:04:55 GMT X-Originating-IP: [24.39.94.195] X-Originating-Email: [ljk4@msn.com] X-Sender: ljk4@msn.com From: "LARRY KLAES" To: public@setileague.org Subject: SETI public: Plan to use positrons instead of antiprotons for antimatter drive spaceship Date: Tue, 18 Apr 2006 15:04:55 -0400 Mime-Version: 1.0 Content-Type: text/plain; format=flowed X-OriginalArrivalTime: 18 Apr 2006 19:04:56.0103 (UTC) FILETIME=[FB2DF370:01C6631A] Sender: owner-public@setileague.org Precedence: bulk New and Improved Antimatter Spaceship for Mars Missions 04.14.06 Most self-respecting starships in science fiction stories use antimatter as fuel for a good reason – it’s the most potent fuel known. While tons of chemical fuel are needed to propel a human mission to Mars, just tens of milligrams of antimatter will do (a milligram is about one-thousandth the weight of a piece of the original M&M candy). ... Previous antimatter-powered spaceship designs employed antiprotons, which produce high-energy gamma rays when they annihilate. The new design will use positrons, which make gamma rays with about 400 times less energy. The NIAC research is a preliminary study to see if the idea is feasible. If it looks promising, and funds are available to successfully develop the technology, a positron-powered spaceship would have a couple advantages over the existing plans for a human mission to Mars, called the Mars Reference Mission. ... "A rough estimate to produce the 10 milligrams of positrons needed for a human Mars mission is about 250 million dollars using technology that is currently under development," said Smith. This cost might seem high, but it has to be considered against the extra cost to launch a heavier chemical rocket (current launch costs are about $10,000 per pound) or the cost to fuel and make safe a nuclear reactor. "Based on the experience with nuclear technology, it seems reasonable to expect positron production cost to go down with more research," added Smith. Another challenge is storing enough positrons in a small space. Because they annihilate normal matter, you can't just stuff them in a bottle. Instead, they have to be contained with electric and magnetic fields. "We feel confident that with a dedicated research and development program, these challenges can be overcome," said Smith. If this is so, perhaps the first humans to reach Mars will arrive in spaceships powered by the same source that fired starships across the universes of our science fiction dreams. Full article with artwork here: http://www.nasa.gov/mission_pages/exploration/mmb/antimatter_spaceship.html From owner-public@setileague.org Tue Apr 18 13:46:47 2006 X-Spam-Checker-Version: SpamAssassin 3.1.0 (2005-09-13) on Sentry.net X-Spam-Level: X-Spam-Status: No, score=-2.6 required=5.0 tests=AWL,BAYES_00, MSGID_FROM_MTA_HEADER autolearn=unavailable version=3.1.0 Received: from seti1.setileague.org (seti1.setileague.org [204.176.91.10]) by Sentry.net (8.13.6/8.13.3) with ESMTP id k3IKklYm001095 for ; Tue, 18 Apr 2006 13:46:47 -0700 Received: (from majordom@localhost) by seti1.setileague.org (8.9.3 (PHNE_24419+JAGae58098)/8.9.3) id QAA21880 for public-list; Tue, 18 Apr 2006 16:42:57 -0400 (EDT) X-Authentication-Warning: seti1.setileague.org: majordom set sender to owner-public@seti1.setileague.org using -f Received: from hotmail.com (bay114-f5.bay114.hotmail.com [65.54.169.15]) by seti1.setileague.org (8.9.3 (PHNE_24419+JAGae58098)/8.9.3) with ESMTP id QAA21873; Tue, 18 Apr 2006 16:42:54 -0400 (EDT) Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Tue, 18 Apr 2006 13:42:23 -0700 Message-ID: Received: from 65.54.169.200 by by114fd.bay114.hotmail.msn.com with HTTP; Tue, 18 Apr 2006 20:42:21 GMT X-Originating-IP: [24.39.94.195] X-Originating-Email: [ljk4@msn.com] X-Sender: ljk4@msn.com From: "LARRY KLAES" To: public@setileague.org Subject: SETI public: The N2K Consortium VI: Doppler Shifts Without Templates and Three New Short-Peri Date: Tue, 18 Apr 2006 16:42:21 -0400 Mime-Version: 1.0 Content-Type: text/plain; format=flowed X-OriginalArrivalTime: 18 Apr 2006 20:42:23.0714 (UTC) FILETIME=[98A09420:01C66328] Sender: owner-public@setileague.org Precedence: bulk Astrophysics, abstract astro-ph/0604348 From: John Johnson [view email] Date: Mon, 17 Apr 2006 03:54:28 GMT (144kb) The N2K Consortium VI: Doppler Shifts Without Templates and Three New Short-Period Planets Authors: John Asher Johnson, Geoffrey W. Marcy, Debra A. Fischer, Gregory Laughlin, R. Paul Butler, Gregory W. Henry, Jeff A. Valenti, Eric B. Ford, Steven S. Vogt, Jason T. Wright Comments: 39 pages, 12 figures, 8 tables (ApJ Accepted) We present a modification to the iodine cell Doppler technique that eliminates the need for an observed stellar template spectrum. For a given target star, we iterate toward a synthetic template spectrum beginning with an existing spectrum of a similar star. We then perturb the shape of this first-guess template to match the program observation of the target star taken through an iodine cell. The elimination of a separate template observation saves valuable telescope time, a feature that is ideally suited for the quick-look strategy employed by the ``Next 2000 Stars'' (N2K) planet search program. Tests using Keck/HIRES spectra indicate that synthetic templates yield a short-term precision of 3 m/s and a long-term, run-to-run precision of 5 m/s. We used this new Doppler technique to discover three new planets: a 1.5 Mjup planet in a 2.1375 d orbit around HD 86081; a 0.71 Mjup planet in circular, 26.73 d orbit around HD 224693; and a Saturn-mass planet in an 18.179 d orbit around HD 33283. The remarkably short period of HD 86081b bridges the gap between the extremely short-period planets detected in the OGLE survey and the 16 Doppler-detected hot jupiters (P < 15 d), which have an orbital period distribution that piles up at about three days. We have acquired photometric observations of two of the planetary host stars with the automated photometric telescopes at Fairborn Observatory. HD 86081 and HD 224693 both lack detectable brightness variability on their radial velocity periods, supporting planetary-reflex motion as the cause of the radial velocity variability. HD 86081 shows no evidence of planetary transits in spite of a 17.6% transit probability. http://arxiv.org/abs/astro-ph/0604348 From owner-public@setileague.org Thu Apr 20 04:31:39 2006 X-Spam-Checker-Version: SpamAssassin 3.1.0 (2005-09-13) on Sentry.net X-Spam-Level: X-Spam-Status: No, score=-2.6 required=5.0 tests=AWL,BAYES_00, MSGID_FROM_MTA_HEADER autolearn=unavailable version=3.1.0 Received: from seti1.setileague.org (seti1.setileague.org [204.176.91.10]) by Sentry.net (8.13.6/8.13.3) with ESMTP id k3KBVd4e005284 for ; Thu, 20 Apr 2006 04:31:39 -0700 Received: (from majordom@localhost) by seti1.setileague.org (8.9.3 (PHNE_24419+JAGae58098)/8.9.3) id NAA29027 for public-list; Wed, 19 Apr 2006 13:53:48 -0400 (EDT) X-Authentication-Warning: seti1.setileague.org: majordom set sender to owner-public@seti1.setileague.org using -f Received: from hotmail.com (bay114-f27.bay114.hotmail.com [65.54.169.37]) by seti1.setileague.org (8.9.3 (PHNE_24419+JAGae58098)/8.9.3) with ESMTP id NAA29020; Wed, 19 Apr 2006 13:53:45 -0400 (EDT) Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Wed, 19 Apr 2006 10:53:14 -0700 Message-ID: Received: from 65.54.169.200 by by114fd.bay114.hotmail.msn.com with HTTP; Wed, 19 Apr 2006 17:53:09 GMT X-Originating-IP: [129.44.214.105] X-Originating-Email: [ljk4@msn.com] X-Sender: ljk4@msn.com From: "LARRY KLAES" To: public@setileague.org Subject: SETI public: Another radio ham detects Voyager 1 - with a 5.6-meter dish! Date: Wed, 19 Apr 2006 13:53:09 -0400 Mime-Version: 1.0 Content-Type: text/plain; format=flowed X-OriginalArrivalTime: 19 Apr 2006 17:53:14.0576 (UTC) FILETIME=[21AEC500:01C663DA] Sender: owner-public@setileague.org Precedence: bulk "Voyager 1 detected at 8420.4286 GHz with extremely long integration time. It is about 98 AU from Earth - that is aprox. 14,698 million Km. (14/04/2006 from 03:00 to 07:00)." Scroll down a bit here: http://w3ref.cfn.ist.utl.pt/cupido/dsn.html From owner-public@setileague.org Thu Apr 20 04:35:36 2006 X-Spam-Checker-Version: SpamAssassin 3.1.0 (2005-09-13) on Sentry.net X-Spam-Level: X-Spam-Status: No, score=-2.6 required=5.0 tests=AWL,BAYES_00, MSGID_FROM_MTA_HEADER autolearn=unavailable version=3.1.0 Received: from seti1.setileague.org (seti1.setileague.org [204.176.91.10]) by Sentry.net (8.13.6/8.13.3) with ESMTP id k3KBZavs005354 for ; Thu, 20 Apr 2006 04:35:36 -0700 Received: (from majordom@localhost) by seti1.setileague.org (8.9.3 (PHNE_24419+JAGae58098)/8.9.3) id PAA01967 for public-list; Wed, 19 Apr 2006 15:27:41 -0400 (EDT) X-Authentication-Warning: seti1.setileague.org: majordom set sender to owner-public@seti1.setileague.org using -f Received: from hotmail.com (bay114-f24.bay114.hotmail.com [65.54.169.34]) by seti1.setileague.org (8.9.3 (PHNE_24419+JAGae58098)/8.9.3) with ESMTP id PAA01962; Wed, 19 Apr 2006 15:27:38 -0400 (EDT) Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Wed, 19 Apr 2006 12:27:06 -0700 Message-ID: Received: from 65.54.169.200 by by114fd.bay114.hotmail.msn.com with HTTP; Wed, 19 Apr 2006 19:27:03 GMT X-Originating-IP: [24.39.94.195] X-Originating-Email: [ljk4@msn.com] X-Sender: ljk4@msn.com From: "LARRY KLAES" To: public@setileague.org Subject: SETI public: Ultraviolet Radiation Constraints around the Circumstellar Habitable Zones Date: Wed, 19 Apr 2006 15:27:03 -0400 Mime-Version: 1.0 Content-Type: text/plain; format=flowed X-OriginalArrivalTime: 19 Apr 2006 19:27:06.0982 (UTC) FILETIME=[3EDBB860:01C663E7] Sender: owner-public@setileague.org Precedence: bulk Astrophysics, abstract astro-ph/0512291 From: Andrea Buccino [view email] Date (v1): Mon, 12 Dec 2005 19:19:49 GMT (74kb) Date (revised v2): Tue, 18 Apr 2006 15:20:32 GMT (76kb) Ultraviolet Radiation Constraints around the Circumstellar Habitable Zones Authors: Andrea P. Buccino, Guillermo A. Lemarchand, Pablo J. D. Mauas Comments: 34 pages, 8 figures Accepted for publication by Icarus Ultraviolet radiation is known to inhibit photosynthesis, induce DNA destruction and cause damage to a wide variety of proteins and lipids. In particular, UV radiation between 200-300 nm becomes energetically very damaging to most of the terrestrial biological systems. On the other hand, UV radiation is usually considered one of the most important energy source on the primitive Earth for the synthesis of many biochemical compounds and, therefore, essential for several biogenesis processes. In this work, we use these properties of the UV radiation to define the bounderies of an ultraviolet habitable zone. We also analyze the evolution of the UV habitable zone during the main sequence stage of the star. We apply these criteria to study the UV habitable zone for those extrasolar planetary systems that were observed by the International Ultraviolet Explorer (IUE). We analyze the possibility that extrasolar planets and moons could be suitable for life, according to the UV constrains presented in this work and other accepted criteria of habitability (liquid water, orbital stability, etc.). http://arxiv.org/abs/astro-ph/0512291 From owner-public@setileague.org Thu Apr 20 04:35:48 2006 X-Spam-Checker-Version: SpamAssassin 3.1.0 (2005-09-13) on Sentry.net X-Spam-Level: X-Spam-Status: No, score=-2.6 required=5.0 tests=AWL,BAYES_00, MSGID_FROM_MTA_HEADER autolearn=unavailable version=3.1.0 Received: from seti1.setileague.org (seti1.setileague.org [204.176.91.10]) by Sentry.net (8.13.6/8.13.3) with ESMTP id k3KBZlWE005368 for ; Thu, 20 Apr 2006 04:35:47 -0700 Received: (from majordom@localhost) by seti1.setileague.org (8.9.3 (PHNE_24419+JAGae58098)/8.9.3) id KAA23524 for public-list; Wed, 19 Apr 2006 10:42:26 -0400 (EDT) X-Authentication-Warning: seti1.setileague.org: majordom set sender to owner-public@seti1.setileague.org using -f Received: from hotmail.com (bay114-f26.bay114.hotmail.com [65.54.169.36]) by seti1.setileague.org (8.9.3 (PHNE_24419+JAGae58098)/8.9.3) with ESMTP id KAA23520; Wed, 19 Apr 2006 10:42:23 -0400 (EDT) Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Wed, 19 Apr 2006 07:41:51 -0700 Message-ID: Received: from 65.54.169.200 by by114fd.bay114.hotmail.msn.com with HTTP; Wed, 19 Apr 2006 14:41:46 GMT X-Originating-IP: [24.39.94.195] X-Originating-Email: [ljk4@msn.com] X-Sender: ljk4@msn.com From: "LARRY KLAES" To: public@setileague.org Subject: SETI public: Killer GRB Unlikely In The Galactic Neighborhood Date: Wed, 19 Apr 2006 10:41:46 -0400 Mime-Version: 1.0 Content-Type: text/plain; format=flowed X-OriginalArrivalTime: 19 Apr 2006 14:41:51.0637 (UTC) FILETIME=[65515450:01C663BF] Sender: owner-public@setileague.org Precedence: bulk STELLAR CHEMISTRY - Killer GRB Unlikely In The Galactic Neighborhood http://www.spacedaily.com/reports/Killer_GRB_Unlikely_In_The_Galactic_Neighborhood.html Ohio State University - Columbus OH (SPX) Apr 18, 2006 Are you losing sleep at night because you're afraid that all life on Earth will suddenly be annihilated by a massive dose of gamma radiation from the cosmos? Well, now you can rest easy. From owner-public@setileague.org Thu Apr 20 08:24:05 2006 X-Spam-Checker-Version: SpamAssassin 3.1.0 (2005-09-13) on Sentry.net X-Spam-Level: X-Spam-Status: No, score=-2.6 required=5.0 tests=AWL,BAYES_00, MSGID_FROM_MTA_HEADER autolearn=unavailable version=3.1.0 Received: from seti1.setileague.org (seti1.setileague.org [204.176.91.10]) by Sentry.net (8.13.6/8.13.3) with ESMTP id k3KFO5Lg009159 for ; Thu, 20 Apr 2006 08:24:05 -0700 Received: (from majordom@localhost) by seti1.setileague.org (8.9.3 (PHNE_24419+JAGae58098)/8.9.3) id LAA07749 for public-list; Thu, 20 Apr 2006 11:12:07 -0400 (EDT) X-Authentication-Warning: seti1.setileague.org: majordom set sender to owner-public@seti1.setileague.org using -f Received: from hotmail.com (bay114-f18.bay114.hotmail.com [65.54.169.28]) by seti1.setileague.org (8.9.3 (PHNE_24419+JAGae58098)/8.9.3) with ESMTP id LAA07745; Thu, 20 Apr 2006 11:12:04 -0400 (EDT) Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Thu, 20 Apr 2006 08:11:33 -0700 Message-ID: Received: from 65.54.169.200 by by114fd.bay114.hotmail.msn.com with HTTP; Thu, 20 Apr 2006 15:11:28 GMT X-Originating-IP: [24.39.94.195] X-Originating-Email: [ljk4@msn.com] X-Sender: ljk4@msn.com From: "LARRY KLAES" To: public@setileague.org Subject: SETI public: Escaping from the black hole? and 2 other papers Date: Thu, 20 Apr 2006 11:11:28 -0400 Mime-Version: 1.0 Content-Type: text/plain; format=flowed X-OriginalArrivalTime: 20 Apr 2006 15:11:33.0358 (UTC) FILETIME=[B5B820E0:01C6648C] Sender: owner-public@setileague.org Precedence: bulk hep-th/0604075 [abs, ps, pdf, other] : Title: Escaping from the black hole? Authors: E. Babichev, V. Mukhanov, A. Vikman Comments: 4 pages, 2 figures We show that if there exists a special kind of Born-Infeld type scalar field, then one can send information from inside a black hole. This information is encoded in perturbations of the field propagating in non-trivial scalar field backgrounds, which serves as a "new ether". Although the theory is Lorentz-invariant it allows, nevertheless, the superluminal propagation of perturbations with respect to the "new ether". We found the stationary solution for background, which describes the accretion of the scalar field onto a black hole. Examining the propagation of small perturbations around this solution we show the signals emitted inside the horizon can reach an observer located outside the black hole. We discuss possible physical consequences of this result. http://arxiv.org/abs/hep-th/0604075 gr-qc/0604072 [abs, ps, pdf, other] : Title: Information-preserving black holes still do not preserve baryon number and other effective global quantum numbers Authors: Dejan Stojkovic, Glenn D. Starkman, Fred C. Adams Comments: Honorable Mention on Gravity Essay Competition 2005; Published in the special Essay issue of Int.J.Mod.Phys Journal-ref: Int.J.Mod.Phys.D14:2293-2300,2005 It has been claimed recently that the black hole information-loss paradox has been resolved: the evolution of quantum states in the presence of a black hole is unitary and information preserving. We point out that, contrary to some claims in literature, information-preserving black holes still violate baryon number and any other quantum number which follows from an effective (and thus approximate) or anomalous symmetry. http://arxiv.org/abs/gr-qc/0604072 gr-qc/0604074 [abs, ps, pdf, other] : Title: The quantum black hole in 2+1 dimensions Authors: B. Ram, J. Shirley Comments: 5 pages, no figs In this paper we investigate the quantum nature of a 2+1 dimensional black hole using the method [arXiv: gr-qc/0504030] which earlier revealed the quantum nature of a black hole in 3+1 dimensions. http://arxiv.org/abs/gr-qc/0604074 From owner-public@setileague.org Thu Apr 20 11:41:35 2006 X-Spam-Checker-Version: SpamAssassin 3.1.0 (2005-09-13) on Sentry.net X-Spam-Level: X-Spam-Status: No, score=-2.6 required=5.0 tests=AWL,BAYES_00, MSGID_FROM_MTA_HEADER autolearn=ham version=3.1.0 Received: from seti1.setileague.org (seti1.setileague.org [204.176.91.10]) by Sentry.net (8.13.6/8.13.3) with ESMTP id k3KIfZ6X012311 for ; Thu, 20 Apr 2006 11:41:35 -0700 Received: (from majordom@localhost) by seti1.setileague.org (8.9.3 (PHNE_24419+JAGae58098)/8.9.3) id OAA13753 for public-list; Thu, 20 Apr 2006 14:36:31 -0400 (EDT) X-Authentication-Warning: seti1.setileague.org: majordom set sender to owner-public@seti1.setileague.org using -f Received: from hotmail.com (bay114-f32.bay114.hotmail.com [65.54.169.42]) by seti1.setileague.org (8.9.3 (PHNE_24419+JAGae58098)/8.9.3) with ESMTP id OAA13749; Thu, 20 Apr 2006 14:36:28 -0400 (EDT) Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Thu, 20 Apr 2006 11:35:56 -0700 Message-ID: Received: from 65.54.169.200 by by114fd.bay114.hotmail.msn.com with HTTP; Thu, 20 Apr 2006 18:35:53 GMT X-Originating-IP: [24.39.94.195] X-Originating-Email: [ljk4@msn.com] X-Sender: ljk4@msn.com From: "LARRY KLAES" To: public@setileague.org Subject: SETI public: The potential for tidally heated icy and temperate moons around exoplanets Date: Thu, 20 Apr 2006 14:35:53 -0400 Mime-Version: 1.0 Content-Type: text/plain; format=flowed X-OriginalArrivalTime: 20 Apr 2006 18:35:56.0903 (UTC) FILETIME=[435C9770:01C664A9] Sender: owner-public@setileague.org Precedence: bulk Astrophysics, abstract astro-ph/0604413 From: Caleb A. Scharf [view email] Date (v1): Wed, 19 Apr 2006 20:00:06 GMT (60kb,P) Date (revised v2): Wed, 19 Apr 2006 20:10:37 GMT (84kb) The potential for tidally heated icy and temperate moons around exoplanets Authors: Caleb A. Scharf Comments: 28 pages, 8 Figures, AASTex, Accepted for publication in the Astrophysical Journal Moons of giant planets may represent an alternative to the classical picture of habitable worlds. They may exist within the circumstellar habitable zone of a parent star, and through tidal energy dissipation they may also offer alternative habitable zones, where stellar insolation plays a secondary, or complementary, role. We investigate the potential extent of stable satellit