The formation of nitrogen-bearing species in dark interstellar clouds

Details The formation of nitrogen-bearing species in dark interstellar clouds The formation of nitrogen-bearing species in dark interstellar clouds

Jun 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990mnras.244..668p&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 244, June 15, 1990, p. 668-674. Research supported by E

Astronomy and Astrophysics

Astronomy

60

Cold Gas, Dark Matter, Interstellar Gas, Magnetohydrodynamic Waves, Molecular Clouds, Nitrogen, Chemical Equilibrium, Interstellar Chemistry, Shock Wave Propagation

Scientific paper

The abundances of N-bearing species in dark molecular clouds are calculated for two cases: (1) in both cold and warm gas, as a function of time until an equilibrium state is attained, and (2) in warm gas which has been heated by an MHD shock wave and in which chemical equilibrium has not been reached. Unlike the parallel chemistries of C- and O-bearing species, the chemistry of nitrogen is probably initiated by neutral-neutral reactions. The computed abundances depend upon the behavior of the associated rate coefficients at low temperatures, where small activation energies can significantly reduce the reaction rates.

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