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Title:
Comprehensive models of diffuse interstellar clouds - Physical conditions and molecular abundances
Authors:
van Dishoeck, E. F.; Black, J. H.
Affiliation:
AA(Leiden, Rijksuniversiteit, Sterrewacht, Netherlands; Harvard-Smithsonian Center for Astrophysics, Cambridge, MA), AB(Steward Observatory, Tucson, AZ)
Publication:
Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 62, Sept. 1986, p. 109-145. (ApJS Homepage)
Publication Date:
09/1986
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
Astronomical Models, Interstellar Matter, Molecular Clouds, Stellar Physics, Abundance, Density Distribution, Equations Of State, Temperature Distribution
DOI:
10.1086/191135
Bibliographic Code:
1986ApJS...62..109V

Abstract

Comprehensive models of interstellar clouds are constructed, which describe the abundances of 120 species and the excitation of H2, C2, CO, and various atomic species as functions of depth. The models are used to infer physical conditions such as density, temperature, intensity of ultraviolet starlight, and cosmic-ray ionization rate in the well-studied diffuse clouds toward zeta Per, zeta Oph, chi Oph, and omicr Per. The current limitations of steady state models are evaluated, and critical observational tests are suggested.

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