Rawlings, J.M.C., Hartquist, T.W., Williams, D.A. et al. (1 more author) (2002) Dark cloud chemistry in initially H-rich regions. Astronomy and Astrophysics, 391 (2). pp. 681-687. ISSN 0004-6361
Abstract
The chemistry in dark regions of dense cores is explored as a function of the initial abundance ratio of H to H 2, on the assumption that some cores form on a timescale and are younger than the time required for the H :H 2 ratio to attain its equilibrium value. Observational diagnostics of non-equilibrium values of the initial H :H 2 ratio are identified. In initially H-rich material, the abundances of OH, NH 3, CN, and HNC are for some time higher than they are in initially H-poor material. In initially H-poor regions, the abundances of CO, species containing multiple carbon atoms in each molecule, and CS are larger for an (observationally significant) period than in initially H-rich material.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © ESO 2002 |
Keywords: | ISM, clouds, molecules, astrochemistry, molecular processes |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Physics and Astronomy (Leeds) The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Mathematics (Leeds) > Applied Mathematics (Leeds) |
Depositing User: | Repository Assistant |
Date Deposited: | 02 Jun 2006 |
Last Modified: | 28 Oct 2016 17:05 |
Published Version: | http://dx.doi.org/10.1051/0004-6361:20020825 |
Status: | Published |
Publisher: | EDP Sciences |
Refereed: | Yes |
Identification Number: | 10.1051/0004-6361:20020825 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:1253 |