Collisions of massive gas clouds with primordial chemical composition

Details Collisions of massive gas clouds with primordial chemical composition Collisions of massive gas clouds with primordial chemical composition

Oct 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982afz....18..629s&link_type=abstract

(Astrofizika, vol. 18, Oct.-Dec. 1982, p. 629-640) Astrophysics (ISSN 0571-7132), vol. 18, no. 4, April 1983, p. 360-367. Transl

Astronomy and Astrophysics

Astrophysics

3

Gas Dynamics, Hydrogen Clouds, Interstellar Gas, Stellar Evolution, Particle Density (Concentration), Thermochemistry

Scientific paper

The thermochemical evolution of matter of primordial chemical composition in collisions of gas clouds at velocities ranging from 40 to 200 km/s is investigated. The clouds range in mass from 10 to the 6th to 10 to the 9th solar masses. The variations with time of the temperature, degree of ionization, and concentrations of H2 and HD molecules behind the shock front are determined. It is shown that H2 and HD molecules are formed in significant numbers and that they ensure cooling of the gas to temperatures of approximately 10-30 K. The results are discussed in relation to the problem of star formation in the early stages of galaxy formation.

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