Observations of chemical differentiation in clumpy molecular clouds
Journal article, 2006
We have extensively mapped a sample of dense molecular clouds (L1512, TMC-1C, L1262, Per7, L1389, L1251E) in lines of HC 3 N, CH 3 OH, SO and C 18 O. We demonstrate that a high degree of chemical differentiation is present in all of the observed clouds. We analyse the molecular maps for each cloud, demonstrating a systematic chemical differentiation across the sample, which we relate to the evolutionary state of the cloud. We relate our observations to the cloud physical, kinematical and evolutionary properties, and also compare them to the predictions of simple chemical models. The implications of this work for understanding the origin of the clumpy structures and chemical differentiation observed in dense clouds are discussed. © The Royal Society of Chemistry 2006.
Author
J. V. Buckle
University of Cambridge
Steven D. Rodgers
NASA Ames Research Center
Eva Wirström
Chalmers, Department of Radio and Space Science, Radio Astronomy and Astrophysics
S. B. Charnley
NASA Ames Research Center
Andrew J. Markwick-Kemper
NASA Ames Research Center
University of Virginia
Harold M. Butner
Joint Astronomy Centre
Shigehisa Takakuwa
National Astronomical Observatory of Japan
Harvard-Smithsonian Center for Astrophysics
Faraday Discussions
1359-6640 (ISSN) 1364-5498 (eISSN)
Vol. 133 63 - 82Subject Categories
Physical Chemistry
Astronomy, Astrophysics and Cosmology
Atom and Molecular Physics and Optics
DOI
10.1039/b516772h