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- W2092183876 abstract "view Abstract Citations (8) References (12) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The Extinction to the H 2 Line Emission in the DR 21 Outflow Source Nadeau, Daniel ; Riopel, Martin ; Geballe, T. R. Abstract The v = 1-0 S(1) and Q(3) lines of H2 have been measured in four regions of the DR 21 H2 line-emission source, in order to determine whether the observed morphology of the emission represents the distribution of the excited H2 or is modified by nonuniform extinction across the source. The measured lines originate from the same upper level, and their ratio is a direct measure of the reddening. The line ratios show that the extinction is quite uniform across the source and that there is no correlation between the intensity and the extinction. This result implies that the gap between the two lobes of emission is not due to increased extinction but rather is a region where there is little excited H2 gas. Publication: The Astrophysical Journal Pub Date: May 1991 DOI: 10.1086/186034 Bibcode: 1991ApJ...372L.103N Keywords: Emission Spectra; H Lines; Infrared Astronomy; Nebulae; Star Formation; Infrared Telescopes; Molecular Clouds; Astrophysics; INFRARED: SOURCES; INTERSTELLAR: MOLECULES; NEBULAE: INDIVIDUAL ALPHANUMERIC: DR 21; STARS: FORMATION full text sources ADS | data products SIMBAD (1)" @default.
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- W2092183876 date "1991-05-01" @default.
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- W2092183876 title "The extinction to the H2 line emission in the DR 21 outflow source" @default.
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