Detection of the S/8/, S/12/, S/13/, S/14/, and S/15/, V = 0-0 rotation lines of molecular hydrogen in Orion

Details Detection of the S/8/, S/12/, S/13/, S/14/, and S/15/, V = 0-0 rotation lines of molecular hydrogen in Orion Detection of the S/8/, S/12/, S/13/, S/14/, and S/15/, V = 0-0 rotation lines of molecular hydrogen in Orion

Oct 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...249l..65k&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor, vol. 249, Oct. 15, 1981, p. L65-L69. NSF-supported research.

Astronomy and Astrophysics

Astrophysics

38

Hydrogen Clouds, Infrared Spectra, Interstellar Gas, Molecular Spectra, Orion Nebula, Shock Waves, Gas Temperature, Interstellar Extinction, Line Spectra, Molecular Energy Levels, Molecular Rotation

Scientific paper

The detection of the molecular hydrogen rotation lines v = 0-0, S(8), S(12), S(13), S(14), and S(15) in the shocked region of the Orion molecular cloud is reported. Line frequencies agree with predicted values to experimental accuracy, and the H2 energy levels are found to be in LTE at 2000 + or - 400 K up to the J = 17 level, at 1.86 eV above the ground state. The 2.1-micron extinction at peak 1 is between 2.2 and 4.0 mag, and evidence is found for variations of H2 emission intensity apart from reddening. In addition, limits are determined for the amount of gas hotter than 2000 K.

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