High-excitation lines of molecular hydrogen: A discriminant between shock models

Details High-excitation lines of molecular hydrogen: A discriminant between shock models High-excitation lines of molecular hydrogen: A discriminant between shock models

Sep 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989esasp.290..281b&link_type=abstract

In ESA, Infrared Spectroscopy in Astronomy p 281-285 (SEE N90-19084 11-89)

Astronomy and Astrophysics

Astronomy

11

Hydrogen, Infrared Spectra, Line Spectra, Molecular Excitation, Shock Waves, Interstellar Gas, Molecular Clouds, Molecular Spectra, Shock Wave Interaction, Spectrum Analysis

Scientific paper

The results of column densities of molecular hydrogen, calculated from nineteen infrared line intensities, are discussed. They were measured at peak 1 of the outflow of the Orion molecular cloud OMC-1. The 1-0 O(7) and 0-0 S(13) lines of H2, at 3.8 microns, are mapped over the source. Their intensity ratio is found to be independent of position in the outflow. These observations are well fitted by a simple cooling-flow model of the line emitting region, but seem to be at variance with predictions of C-shocks current in the literature.

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