Rawlings, J.M.C., Hartquist, T.W., Williams, D.A. and Falle, S.A.E.G. (2002) Dark cloud chemistry in initially H-rich regions. Astronomy and Astrophysics, 391 (2). pp. 681-687. ISSN 0004-6361
Available under licence : See the attached licence file.
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.
|Copyright, Publisher and Additional Information:||© ESO 2002|
|Keywords:||ISM, clouds, molecules, astrochemistry, molecular processes|
|Institution:||The University of Leeds|
|Academic Units:||The University of Leeds > Faculty of Maths and Physical Sciences (Leeds) > School of Physics and Astronomy (Leeds)
The University of Leeds > Faculty of Maths and Physical Sciences (Leeds) > School of Mathematics (Leeds) > Applied Mathematics (Leeds)
|Depositing User:||Repository Assistant|
|Date Deposited:||02 Jun 2006|
|Last Modified:||12 Jun 2014 16:38|