Atomic and molecular processes in interstellar shocks

Details Atomic and molecular processes in interstellar shocks Atomic and molecular processes in interstellar shocks

Aug 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989jphb...22.2319f&link_type=abstract

Journal of Physics B - Atomic, Molecular and Optical Physics (ISSN 0953-4075), vol. 22, Aug. 14, 1989, p. 2319-2339.

Physics

6

Atomic Interactions, Interstellar Matter, Molecular Interactions, Shock Wave Propagation, Carbon, Chemical Fractionation, Deuterium, Hydrogen, Molecular Collisions, Molecular Excitation, Oxygen, Water

Scientific paper

Shocks propagate in the interstellar gas, including those regions in which molecules exist. The passage of a shock wave modifies the rates of physical and chemical processes occurring in the gas, with important consequences for its composition. In this review, the chemistry of carbon- and oxygen-bearing species under the conditions appropriate to interstellar shocks is discussed. The collisional excitation of rotational transitions in molecules and of fine-structure transitions in atoms, which play key roles in the thermal balance of the medium, are also considered. So too are the effects of shocks on the degree of chemical fractionation of deuterium, a process which can modify considerably the ratios of deuterium- and hydrogen-bearing isotopes in interstellar clouds.

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