Detection of H2 emission at 1.064 microns in the Orion nebula

Details Detection of H2 emission at 1.064 microns in the Orion nebula Detection of H2 emission at 1.064 microns in the Orion nebula

Jun 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984a%26a...135l..11m&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 135, no. 2, June 1984, p. L11-L13.

Astronomy and Astrophysics

Astronomy

3

Astronomical Spectroscopy, Infrared Astronomy, Molecular Spectroscopy, Orion Nebula, Emission Spectra, Interstellar Gas

Scientific paper

Emission of H2 in the S7 line of the (2,0) band at 1.064 μm, from regions of M42 emitting H2 lines in the IR, is reported. The line profile is asymmetric, with an extended violet wing, similar to that of (1,0)S1 at 2.1 μm. Regions not emitting (1,0)S1 show a sharp symmetric line centered at the wavelength expected for H2(2,0)S7, which is, nevertheless, considered as unidentified. The extinction optical depth at (1,0)S1, derived from a comparison of its violet shifted flux with that at S7, is nearly in agreement with the value obtained from IR data, when the scattering of S7 radiation by internebular dust is taken into account. It is estimated that over 60% of the measured (2,0)S7 emission has undergone scattering in its transport through the nebula.

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