Magnetohydrodynamic shocks in diffuse clouds. II - Production of CH(+), OH, CH, and other species

Details Magnetohydrodynamic shocks in diffuse clouds. II - Production of CH(+), OH, CH, and other species Magnetohydrodynamic shocks in diffuse clouds. II - Production of CH(+), OH, CH, and other species

Nov 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...310..392d&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 310, Nov. 1, 1986, p. 392-407. Research supported by the Alfred P. Sloan Fo

Other

79

Hydrocarbons, Hydroxyl Radicals, Interstellar Chemistry, Magnetohydrodynamic Waves, Molecular Clouds, Shock Wave Propagation, Abundance, Astronomical Models, Astronomical Spectroscopy, Gaseous Diffusion, Line Shape

Scientific paper

Molecule production and excitation of H2 are studied for MHD shock waves propagating into diffuse molecular gas. Extensive calculations are carried out for a preshock density nH = 50 cm-3 and for 0.5 ≤ H2/H ≤ 5. CH+ column densities in excess of 1013cm-2 can be produced by shocks with vs > 9 km s-1; OH and CH are also produced in these shocks. The production of other species - in particular, CO, HCO+, CH2+, and CH3+ - is discussed, and column densities of rotationally excited H2 are computed. Specific shock models are proposed for the lines of sight to ζ Per, ο Per, and χ Oph, and the models are compared to available observations.

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