SETI public: How Dry is the Brown Dwarf Desert?: Quantifying the Relative Number of Planets,

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From: LARRY KLAES (ljk4_at_msn.com)
Date: Wed Dec 14 2005 - 12:41:28 PST

  • Next message: LARRY KLAES: "SETI public: Early Evolution of Stellar Groups and Clusters: Environmental Effects on"

    Paper: astro-ph/0412356

    replaced with revised version Tue, 13 Dec 2005 00:49:09 GMT (226kb)

    Title: How Dry is the Brown Dwarf Desert?: Quantifying the Relative Number
    of
    Planets, Brown Dwarfs and Stellar Companions around Nearby Sun-like Stars

    Authors: Daniel Grether (School of Physics, University of New South Wales)
    and
    Charles H. Lineweaver (Planetary Science Institute, Research School of
    Astronomy and Astrophysics & Research School of Earth Sciences, Australian
    National University)

    Comments: Conforms to version accepted by ApJ. 13 pages formatted with
    emulateapj.cls

    \\ ( http://arXiv.org/abs/astro-ph/0412356 , 226kb)

    Paper: astro-ph/0512322
    Date: Tue, 13 Dec 2005 13:03:32 GMT (71kb)

    Title: Spectroscopic companions of very young brown dwarfs

    Authors: Joergens Viki (Leiden Observatory)

    Comments: Proceeding of ESO workshop 'Multiple Stars across the HRD'
    (Garching
    2005). 6 pages, 4 figures
    \\
    I review here the results of the first RV survey for spectroscopic
    companions
    to very young brown dwarfs (BDs) and (very) low-mass stars in the ChaI
    star-forming cloud with UVES at the VLT. This survey studies the binary
    fraction in an as yet unexplored domain not only in terms of primary masses
    (substellar regime) and ages (a few Myr) but also in terms of companion
    masses
    (sensitive down to planetary masses) and separations (< 1 AU). The UVES
    spectra
    obtained so far hint at spectroscopic companions of a few Jupiter masses
    around
    one BD and around one low-mass star (M4.5) with orbital periods of at least
    several months. Furthermore, the data indicate a multiplicity fraction
    consistent with field BDs and stellar binaries for periods < 100 days.

    \\ ( http://arXiv.org/abs/astro-ph/0512322 , 71kb)

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