Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990ap%26ss.163..333z&link_type=abstract
Astrophysics and Space Science (ISSN 0004-640X), vol. 163, no. 2, Jan. 1990, p. 333-339. Research supported by the Institute of
Astronomy and Astrophysics
Astrophysics
Hydrogen, Infrared Spectra, Molecular Clouds, Molecular Spectra, Photodissociation, Emission Spectra, Fluorescence, Interstellar Matter, Ortho Para Conversion
Scientific paper
The photodissociation regions located between ionized regions and molecular clouds are studied by using a one-dimensional model where molecular H2 are formed on the dust grains and destructed by photodissociation. The escape probability method is used for the line transfer. The excitation of IR emission lines of H2 by UV fluorescence in M17, by shock heating in Orion KL and mainly by UV fluorescence in NGC 2023 are discussed.
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