Ortho-H2O and the energy equilibrium in molecular clouds

Details Ortho-H2O and the energy equilibrium in molecular clouds Ortho-H2O and the energy equilibrium in molecular clouds

Mar 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985acasn..26..213z&link_type=abstract

(Acta Astronomica Sinica, vol. 26, no. 3, 1985, p. 213-225) Chinese Astronomy and Astrophysics (ISSN 0275-1062), vol. 10, March

Astronomy and Astrophysics

Astrophysics

Cosmic Dust, Energy Budgets, Molecular Clouds, Radiative Heat Transfer, Water, Abundance, Equilibrium Equations, Gas Temperature, Heating, Molecular Collisions

Scientific paper

The present consideration of the effect of ortho-H2O on the energy equilibrium process of molecular clouds compares its heating rate to that due to dust gas collision and the total cooling rate of the gas. For a cloud with 20 K temperature, if the dust temperature is 35 K, the ortho-H2O heating rate will catch up with the gas cooling rate when n(H2) is greater than 10,000/cu cm. This indicates that the water molecule strengthens the coupling between the dust and the gas. Also compared are the effects on calculated results that are due to differences in the collisional cross section, dust emission, velocity gradient, and water abundance.

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