Cooling of Pre-Galactic Gas Clouds by Hydrogen Molecule

Details Cooling of Pre-Galactic Gas Clouds by Hydrogen Molecule Cooling of Pre-Galactic Gas Clouds by Hydrogen Molecule

Aug 1969

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1969pthph..42..219m&link_type=abstract

Progress of Theoretical Physics, Vol. 42, No. 2, pp. 219-233

Physics

112

Scientific paper

According to the expanding hot universe model, neutralization of the cosmic plasma ceases at the stage of radiation temperature Tγ ≃ 4000°K. After then, a density contrast in the uniform medium grows into a contracting gas could with mass greater than 105 ˜ 6M&sun;. Hydrogen molecule is formed in the cloud after the stage of Tγ ≃ 300°K, and the thermal evolution is largely affected by the cooling through H2, whose processes are studied quantitatively in this paper. The present paper is a preliminary one for a more interesting problem of galaxy formation.

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