A submillimetre map of the W51 region

Details A submillimetre map of the W51 region A submillimetre map of the W51 region

Oct 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984mnras.210..891c&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 210, Oct. 15, 1984, p. 891-897.

Astronomy and Astrophysics

Astronomy

11

Astronomical Maps, Cosmic Dust, Molecular Clouds, Submillimeter Waves, Astronomical Spectroscopy, Density Distribution, Far Infrared Radiation, H Ii Regions, Infrared Astronomy, Mass Distribution, Radio Astronomy, Spectral Resolution, Stellar Evolution, Water Masers

Scientific paper

An extended dust distribution that encompasses two separate density enhancements is noted in the sub-mm mapping of a section of the molecular cloud/H II region complex W51 at 40-arcsec resolution. The total mass of the cloud is as much as one thousand times that of previously mapped objects, although like them, it exhibits star formation sites that are coincident with the density peaks. The main sub-mm peak is adjacent to IRS1, and coincident with the very powerful H2O maser W51(Main). This massive dust peak contains about half the mass of the cloud, and can provide an optical extinction of about 1700; this may explain the puzzling lack of 20-micron emission.

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