H{sub 2} AND HD DIRECT PHOTODISSOCIATION IN THE CHEMISTRY OF THE PRIMORDIAL UNIVERSE

Journal Article · Thu Jan 20 00:00:00 EST 2011 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/727/1/37· OSTI ID:21567613

Coppola, Carla M; Diomede, Paola; Longo, Savino; Capitelli, Mario ^[1]

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1. Department of Chemistry, University of Bari, Via Orabona 4, 70126 Bari (Italy)

In this work, we calculate the thermal contribution to the rate coefficients for the processes of photodissociation of H{sub 2} and HD molecules. A comparison between direct and indirect rate coefficients is reported for molecular hydrogen. The rate coefficients are calculated including all vibrational levels of both molecules. Interpolation expressions for all processes are provided as a function of temperature. The resulting total rates for these processes are contextualized by direct numerical calculations based on a standard chemical network for the primordial universe.

• OSTI ID: 21567613
• Journal Information: Astrophysical Journal, Vol. 727, Issue 1; Other Information: DOI: 10.1088/0004-637X/727/1/37; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
HYDROGEN
MOLECULES
PHOTOLYSIS
TEMPERATURE DEPENDENCE
UNIVERSE
CHEMICAL REACTIONS
DECOMPOSITION
ELEMENTS
NONMETALS
PHOTOCHEMICAL REACTIONS