Molecular hydrogen as a probe of the early universe

Details Molecular hydrogen as a probe of the early universe Molecular hydrogen as a probe of the early universe

Jun 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984azh....61..460s&link_type=abstract

(Astronomicheskii Zhurnal, vol. 61, May-June 1984, p. 460-466) Soviet Astronomy (ISSN 0038-5301), vol. 28, May-June 1984, p. 270

Astronomy and Astrophysics

Astronomy

Cosmology, Hydrogen Production, Hydrogen Recombinations, Molecular Clouds, Universe, Molecular Oscillations, Molecular Rotation, Nonequilibrium Thermodynamics, Radiative Transfer

Scientific paper

The possibility that H2 formation in the universe after the recombinative-formation period (i.e., at redshifts of 1000 or less) has produced observable effects is investigated theoretically. Consideration is given to a formation mechanism and to secondary-heating processes, both leading to nonequilibrium populations of the H2 vibration-rotation levels and hence to distortions of the cosmic-background spectrum. The distortions due to the radiative decay of the H2 population itself are estimated as of the order (1-100) x 10 to the -9th, which cannot be detected by present instruments; secondary-heating effects are analyzed in greater detail for the case of weak heating, and detectable distortions are predicted.

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