Interstellar chemistry - Gas and surface phase processes; time dependence

Details Interstellar chemistry - Gas and surface phase processes; time dependence Interstellar chemistry - Gas and surface phase processes; time dependence

Mar 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986qjras..27...64w&link_type=abstract

Royal Astronomical Society, Quarterly Journal (ISSN 0035-8738), vol. 27, March 1986, p. 64-70.

Astronomy and Astrophysics

Astrophysics

10

Astronomical Models, Interstellar Chemistry, Molecular Clouds, Molecular Gases, Time Dependence, Abundance, Chemical Effects, Chemical Reactions, Gas Density

Scientific paper

The astrophysical information content in data on interstellar molecules may be tapped by studying chemical models of interstellar clouds. The considerations to be made in setting up such a model are briefly described. Such models do not lead to unique descriptions, and a procedure useful in minimizing the ambiguities in some diffuse cloud models is given. Dense clouds also require careful treatment. However, the situation in them is complicated by many time-dependent factors, including especially the problem of accretion of gas phase molecules onto grain surfaces. Uncertainties in the processes of adsorption and desorption, and in the dynamics of dense clouds, currently prevent a clear description of these astronomical objects.

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