Continuum observations of the H II regions W 51 A, W 3 /Main/, W 49 A and DR 21 at 3.9 MM

Details Continuum observations of the H II regions W 51 A, W 3 /Main/, W 49 A and DR 21 at 3.9 MM Continuum observations of the H II regions W 51 A, W 3 /Main/, W 49 A and DR 21 at 3.9 MM

Jan 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979a%26a....71..198m&link_type=abstract

Astronomy and Astrophysics, vol. 71, no. 1-2, Jan. 1979, p. 198-204.

Astronomy and Astrophysics

Astronomy

14

Continuous Radiation, Cosmic Dust, H Ii Regions, Interstellar Radiation, Millimeter Waves, Radio Sources (Astronomy), Hydrogen Ions, Radio Astronomy, Radio Telescopes

Scientific paper

The 13.7-m radio telescope at the Metsahovi Radio Research Station equipped with a 76 GHz mixer receiver has been used to observe the continuum emission of the H II regions W 51 A, W 3 (Main), W 49 A, and W 75/DR 21. The 3.9 mm flux densities for W 3 (Main), W 49 A, and W 75/DR 21 are in good agreement with previous observations and are consistent with pure free-free emission. For W 51 A we have detected an excess emission. It has been interpreted as thermal emission by heated dust associated with the dense molecular cloud.

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