Rotational-level populations of molecules in the interstellar medium

Details Rotational-level populations of molecules in the interstellar medium Rotational-level populations of molecules in the interstellar medium

Dec 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978azh....55.1169v&link_type=abstract

Astronomicheskii Zhurnal, vol. 55, Nov.-Dec. 1978, p. 1169-1175. In Russian.

Astronomy and Astrophysics

Astronomy

1

Astronomical Spectroscopy, Interstellar Matter, Molecular Rotation, Carbon Monoxide, Gas Density, Gas Temperature, Nonequilibrium Conditions, Silicon Oxides

Scientific paper

Nonequilibrium lower-rotational-level populations of CO, CS, and SiO molecules for a wide range of interstellar gas densities and temperatures are calculated for a specified radiation temperature of 2.76 K. It is found that differences between the gas and radiation temperatures lead to significant deviations from Boltzmann population distributions in cases where the radiative and collisional transition probabilities are of the same order of magnitude.

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