Low-density photodissociation regions

Details Low-density photodissociation regions Low-density photodissociation regions

Aug 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...377..192h&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 377, Aug. 10, 1991, p. 192-209.

Astronomy and Astrophysics

Astrophysics

286

Infrared Spectra, Interstellar Chemistry, Interstellar Gas, Molecular Clouds, Photodissociation, Radiative Transfer, Chemical Equilibrium, Far Ultraviolet Radiation, Radiation Distribution, Thermodynamic Equilibrium

Scientific paper

A theoretical parameter study of the temperature and chemical structure of photodissociation regions (PDRs) and their resultant spectrum is presented. The models, which solve for the chemical and thermal steady state of a one-dimensional slab exposed to an incident FUV flux, relate the observed line and continuum emission from these regions to physical parameters of interest. Intensities of numerous fine-structure lines, the molecular rotational transitions (C-12)O J = 1-0 and H2 0-0 S(0), and the dust continuum intensities at 60 and 100 microns are predicted, and the column density of FUV-pumped vibrationally excited H2 is estimated.

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