Molecular clumps associated with ultra compact H II regions

Details Molecular clumps associated with ultra compact H II regions Molecular clumps associated with ultra compact H II regions

Dec 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...252..278c&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 252, no. 1, Dec. 1991, p. 278-290.

Astronomy and Astrophysics

Astrophysics

105

H Ii Regions, Interstellar Matter, Molecular Clouds, Brightness Temperature, Interstellar Gas, Ionized Gases, Line Spectra, Methyl Alcohol, Molecular Gases

Scientific paper

J = 2-1, 3-2 and 5-4 C(S-34) observations have been carried out toward eight ultracompact H II regions that are prominent in ammonia emission. In several cases, high density (about 10 exp 6/cu cm) clumps with mass about 2000 solar masses and size about 0.4 pc around the ionized gas. The results are consistent with the idea that O-B stars form in high density surroundings. The clumps appear to be in virial equilibrium, and their size is consistent with that required by the bow shock model for ultracompact H II regions. Predictions of different models for the evolution of H II regions are discussed. Detections of torsionally excited methanol toward G10.47 and G31.41 are also reported.

Affiliated with

Also associated with

No associations

Rating

Molecular clumps associated with ultra compact H II regions does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Molecular clumps associated with ultra compact H II regions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Molecular clumps associated with ultra compact H II regions will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1536029