Observations of 1-millimeter continuum radiation from the DR 21 region

Details Observations of 1-millimeter continuum radiation from the DR 21 region Observations of 1-millimeter continuum radiation from the DR 21 region

Aug 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975apj...199l.185w&link_type=abstract

Astrophysical Journal, vol. 199, Aug. 1, 1975, pt. 2, p. L185-L187. Research supported by the Research Corp.;

Astronomy and Astrophysics

Astrophysics

42

Astronomical Maps, Interstellar Gas, Masers, Millimeter Waves, Continuous Radiation, H Ii Regions, Hydroxyl Emission, Microwave Emission, Nebulae

Scientific paper

Continuum emission at 1 mm has been mapped with 1-min resolution over a 3-min by 8-min area including the compact H II region DR 21, the maser source W75(S)-OH, and the central portions of the surrounding molecular cloud. Peaks in the 1-mm intensity are observed at the positions of DR 21 and W75(S)-OH, and are roughly coincident with less marked peaks in the intensity of HCN and CO emission. An extended component of 1-mm emission is present as well. The principal source of 1-mm radiation is thought to be thermal emission from dust within the molecular gas. The characteristics of this radiation which make it a promising tool for the study of molecular clouds are briefly discussed.

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