Astronomy and Astrophysics Supplement Series

Free access article

Issue		Astron. Astrophys. Suppl. Ser. Volume 119, Number 1, October_I 1996
Page(s)		111 - 114
DOI		10.1051/aas:1996232

Fractional abundances of molecules in dense interstellar clouds: A compendium of recent model results DOI: 10.1051/aas:1996232

Astronomy and Astrophysics Supplement Series, Vol. 119, October I 1996, 111-114

Fractional abundances of molecules in dense interstellar clouds: A compendium of recent model results

H.-H. Lee , R.P.A. Bettens and E. Herbst

Send offprint requests to: E. Herbst

Department of Physics, The Ohio State University, Columbus, OH 43210, U.S.A.
Department of Astronomy, The Ohio State University, Columbus, OH 43210, U.S.A.

Received January 16; accepted February 21, 1996

Abstract:

In this paper we present calculated fractional abundances in dense interstellar clouds for selected atomic and molecular species using three different homogeneous, pseudo-time-dependent models discussed by Bettens, Lee, & Herbst (1995): the new standard model, the new neutral-neutral model, and model 4. We have run each model with 3 different hydrogen densities --

, and

-- and two temperatures -- 10 K and 50 K. ``Low metal'' elemental abundances have been used for all three models; the new standard model has also been run with ``high metal'' abundances.

Key words: ISM: clouds --- ISM: abundances --- ISM: molecules --- molecular processes

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