Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981stin...8133117b&link_type=abstract
Unknown
Astronomy and Astrophysics
Astronomy
Hydrogen, Infrared Astronomy, Interstellar Matter, Star Clusters, Stellar Radiation, Infrared Stars, Line Spectra, Main Sequence Stars, Masers, Shock Waves, Stellar Mass Ejection
Scientific paper
The detection of emission from the v = 1 approaches 0 S(1) quadrupole transition of H2 toward the cluster of intense infrared and H2O maser sources in W51 (north) is reported. The apparent luminosity of this line in W51 (north) is only about 4% of the luminosity of the same line toward the Kleinmann-Low infrared cluster in Orion; however, additional line-of-sight extinction and spatial extent of the source may account for the lower apparent power in W51. Similarity in the infrared and H2O properties of these clusters is addressed. The implications of the H2 emission for mass loss in the W51 region is discussed and some proposed models of radiation-driven mass outflow from pre-main sequence stars are briefly considered.
Beckwith Steve
Zuckerman Ben
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