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Title:
The infrared response of molecular hydrogen gas to ultraviolet radiation - High-density regions
Authors:
Sternberg, A.; Dalgarno, A.
Affiliation:
AA(Tel Aviv University, Israel), AB(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA)
Publication:
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 338, March 1, 1989, p. 197-233. (ApJ Homepage)
Publication Date:
03/1989
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
HYDROGEN, INFRARED SOURCES (ASTRONOMY), INTERSTELLAR GAS, MOLECULAR GASES, ULTRAVIOLET RADIATION, EMISSION SPECTRA, GAS DENSITY, PHOTODISSOCIATION, PLANETARY NEBULAE, RADIATION DISTRIBUTION, RADIATIVE TRANSFER
DOI:
10.1086/167193
Bibliographic Code:
1989ApJ...338..197S

Abstract

A study is presented of the behavior of the H2 infrared emission spectra that are produced in dense static photodissociation regions exposed to UV radiation which both heats and excites the H2 gas. The theory of H2 excitation by UV radiation and the construction of one-dimensional steady state models which are used to compute the H2 infrared spectra for a wide range of cloud conditions are discussed. The results of a number of illustrative model calculations are presented.

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