Molecular collision processes in interstellar clouds

Details Molecular collision processes in interstellar clouds Molecular collision processes in interstellar clouds

Mar 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989phr...174....1f&link_type=abstract

Physics Reports, Volume 174, Issue 1, p. 1-66.

Physics

14

Scientific paper

A review is given of some of the molecular collision processes which are important in studies of the interstellar medium. The emphasis is on molecular rovibrational and atomic fine structure excitation processes, which determine the rate of cooling of the interstellar gas. The OH maser problem is considered in some detail. Applications of the results of such calculations to studies of interstellar clouds are discussed. Diffuse clouds, which are subject to the interstellar ultraviolet radiation field, and dense clouds, where photo-processes are unimportant, are considered. Particular attention is paid to the requirements of studies of the hot post-shock gas, where endothermic chemical reactions can occur and where the chemistry differs considerably from that in the cold ambient medium.

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