Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...286..573r&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 286, Nov. 15, 1984, p. 573-577. Research supported by the U.S. Navy and Nat
Astronomy and Astrophysics
Astronomy
15
Infrared Astronomy, Molecular Clouds, O Stars, Star Clusters, Stellar Luminosity, Brightness Distribution, Far Infrared Radiation, H Ii Regions, High Resolution, Radio Astronomy, Stellar Evolution
Scientific paper
A far-IR map with 1 arcmin resolution was obtained of the W51 H II region molecular cloud complex. The 40-120 microns survey was performed to study embedded sources which excite the H II gas. The far-IR emission distribution overlapped radio emissions from the region, implying that the extended dust clouds were heated by the same sources as the H II regions. Four compact sources were characterized and associated with concentrations of luminosities that suggested a scarcity of low-mass stars. The brightest source, labeled W51-I, has a luminosity/mass ratio of 150, high enough to indicate a burst of massive O star formation. No triggering mechanism was identified for the burst of star formation.
Cheung L. H.
Fazio Giacomo
McBreen Brian
Rengarajan T. N.
Shivanandan Kandiah
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