Abstract
view Abstract Citations (58) References (21) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The M17 SW molecular cloud. Thronson, H. A., Jr. ; Lada, C. J. Abstract The H II region M17 is one of the best known objects in the sky. The H II region abuts a dense, relatively hot molecular cloud known as M17 SW, which is itself embedded within the edge of one of the largest giant molecular cloud complexes in the Galaxy. Carbon monoxide observations (J = 1 to 0) were obtained during two observing runs at an 11 m telescope during the time of 1981 January 26-29 and 1981 September 22-27. New, moderate-resolution maps of the massive M17 SW molecular cloud are presented and discussed. It is found that the strongest molecular emission lies in a ridge parallel and adjacent to an apparent ionization and molecular dissociation front. M17 SW is a massive dense molecular condensation. The visual extinction through the center of the cloud is around 200 mag. The present data are consistent with the views that the M17 SW cloud is largely heated externally, by the ionizing stars of the H II region. Publication: The Astrophysical Journal Pub Date: June 1983 DOI: 10.1086/161028 Bibcode: 1983ApJ...269..175T Keywords: Abundance; Infrared Astronomy; Molecular Clouds; Radio Sources (Astronomy); Stellar Evolution; Carbon Monoxide; Gas Dissociation; Gas Temperature; H Ii Regions; Infrared Spectra; Interstellar Extinction; Ionized Gases; Millimeter Waves; Optical Thickness; Astrophysics full text sources ADS | data products SIMBAD (2)
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