SETI bioastro: The Sun's Journey Through the Local Interstellar Medium: The PaleoLISM and Paleo

SETI bioastro: The Sun's Journey Through the Local Interstellar Medium: The PaleoLISM and Paleo

From: LARRY KLAES <ljk4_at_msn.com>
Date: Mon Jul 03 2006 - 17:26:38 PDT
Message-ID: <BAY114-F791C728A1409267D0892D9C710@phx.gbl>

Astrophysics, abstract
astro-ph/0606743

From: Priscilla Chapman Frisch [view email]

Date: Fri, 30 Jun 2006 14:55:02 GMT (87kb)

The Sun's Journey Through the Local Interstellar Medium: The PaleoLISM and
Paleoheliosphere

Authors: P. C. Frisch, J. D. Slavin

Comments: To be published in Astrophysics and Space Sciences Transactions
(ASTRA), for the proceedings of the workshop "Future Perspectives in
Heliospheric Research: Unsolved Problems, New Missions - New Sciences" Bad
Honnef, Germany, April 6-8, 2005, held in honor of Prof. Hans Fahr's 65th
birthday

Over the recent past, the galactic environment of the Sun has differed
substantially from today. Sometime within the past ~130,000 years, and
possibly as recent as ~56,000 years ago, the Sun entered the tenuous tepid
partially ionized interstellar material now flowing past the Sun. Prior to
that, the Sun was in the low density interior of the Local Bubble. As the
Sun entered the local ISM flow, we passed briefly through an interface
region of some type. The low column densities of the cloud now surrounding
the solar system indicate that heliosphere boundary conditions will vary
from opacity considerations alone as the Sun moves through the cloud. These
variations in the interstellar material surrounding the Sun affected the
paleoheliosphere.

http://xxx.lanl.gov/abs/astro-ph/0606743
Received on Mon Jul 3 17:30:49 2006

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