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Comparing ice composition in dark molecular clouds

Published online by Cambridge University Press:  01 February 2008

C. Knez ,
M. Moore ,
S. Travis ,
R. Ferrante ,
J. Chiar ,
A. Boogert ,
L. Mundy ,
Y. Pendleton ,
A. Tielens  and
E. van Dishoeck
...Show all authors
C. Knez
Affiliation:
University of Maryland, email: claudia@astro.umd.edu Goddard Center for Astrobiology
M. Moore
Affiliation:
Goddard Center for Astrobiology
S. Travis
Affiliation:
U.S. Naval Academy
R. Ferrante
Affiliation:
U.S. Naval Academy
J. Chiar
Affiliation:
SETI Institute
A. Boogert
Affiliation:
Herschel Science Center
L. Mundy
Affiliation:
University of Maryland, email: claudia@astro.umd.edu Goddard Center for Astrobiology
Y. Pendleton
Affiliation:
NASA Headquarters
A. Tielens
Affiliation:
NASA Ames
E. van Dishoeck
Affiliation:
Leiden University
N. Evans
Affiliation:
University of Texas at Austin
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Abstract

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We present 5–20 μm Spitzer/IRS spectroscopy toward stars behind dark molecular clouds. We present preliminary results from the Serpens dark cloud to show the variation between environments within a cloud. We are surveying 3 clouds with varying levels of star formation activity. Serpens has the highest level of activity from our 3 clouds. We show that location as well extinction can cause variations in ice composition. We also find that some lines of sight contain organic molecules such as methane and methanol, and the first detection of acetylene ice in the interstellar medium. We believe the high extinction lines of sight have been enriched by star formation activity near those lines of sight.

Keywords

ISM: moleculesastrochemistrytechniques: spectroscopic
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 4 , Symposium S251: Organic Matter in Space , February 2008 , pp. 47 - 48
Copyright
Copyright © International Astronomical Union 2008

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