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.


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 - 82

Subject Categories

Physical Chemistry

Astronomy, Astrophysics and Cosmology

Atom and Molecular Physics and Optics



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