Abstract
view Abstract Citations (10) References (14) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Evidence for temporal variations in the H2 2.1 micron emission from the Orion nebula. Ogden, P. M. ; Roesler, F. L. ; Larson, H. P. ; Smith, H. A. ; Reynolds, R. J. ; Scherb, F. Abstract 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. Publication: The Astrophysical Journal Pub Date: October 1979 DOI: 10.1086/183068 Bibcode: 1979ApJ...233L..21O Keywords: 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; Astrophysics; Hydrogen:Interstellar Molecules; Infrared Spectra:Orion Nebula; Molecular Hydrogen:Orion Nebula full text sources ADS |
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