The role of the HD molecule in the development of primordial condensations

Details The role of the HD molecule in the development of primordial condensations The role of the HD molecule in the development of primordial condensations

Dec 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976sval....2..227v&link_type=abstract

(Pis'ma v Astronomicheskii Zhurnal, vol. 2, Dec. 1976, p. 574-576.) Soviet Astronomy Letters, vol. 2, Nov.-Dec. 1976, p. 227, 22

Astronomy and Astrophysics

Astronomy

8

Deuterium, Gas Cooling, Gravitational Effects, Hydrogen Atoms, Stellar Evolution, Chemical Reactions, Condensation, Heat Transfer, Thermodynamics

Scientific paper

The cooling function of HD molecules is calculated for conditions characteristic of the initial gas condensations that eventually contracted into stars, taking deviations from local thermodynamic equilibrium into account. The role of chemical enrichment of the gas by HD molecules is investigated. It is shown that the HD molecule constituted the major heat-transferring gas component at the initial stage of condensation during the formation of first-generation (i.e., Population II) stars.

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