Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apj...233l..21o&link_type=abstract
Astrophysical Journal, Part 2 - Letters to the Editor, vol. 233, Oct. 1, 1979, p. L21-L24. Navy-supported research
Astronomy and Astrophysics
Astronomy
8
Astronomical Spectroscopy, Hydrogen, Infrared Astronomy, Orion Nebula, Periodic Variations, Spectral Emission, Fabry-Perot Spectrometers, High Resolution, Infrared Spectroscopy, Interstellar Matter, Normal Density Functions, Spectral Resolution
Scientific paper
High-spectral-resolution Fabry-Perot observations of the H2 1-0 S(1) line at 2.12 microns from the direction of the Orion Nebula have been carried out. From a position in the vicinity of peak 1, the line is observed to have a non-Gaussian, asymmetric profile approximately 45 + or - 7 km/s wide (full width at half-maximum), with a centroid LSR velocity of about 0 km/s. Observations made 10 months prior to the present work in the same sky position showed a Gaussian line only 13 km/s wide, with a centroid LSR velocity of +9 km/s. The possibility of a temporal change in the H2 emission is discussed.
Larson Harold P.
Ogden P. M.
Reynolds Ron J.
Roesler Fred L.
Scherb Frank
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