Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989aj.....97..172m&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 97, Jan. 1989, p. 172-181.
Astronomy and Astrophysics
Astronomy
1
B Stars, H Ii Regions, Molecular Clouds, Sky Surveys (Astronomy), Star Formation, Stellar Mass, Continuous Spectra, Main Sequence Stars, Radio Sources (Astronomy), Raster Scanning
Scientific paper
The results of a radio-continuum survey of embedded H II regions of a number of relatively nearby molecular clouds of moderate size are reported. A number of flat-spectral-index sources were found, for which flux densities were measured at 1.3, 2.8, and 9 cm. The relationship of these sources with their associated molecular clouds is discussed. It is concluded that (1) the star-forming efficiency of these clouds is 2-3 percent, and possibly as high as 5 percent; (2) early-type stars can form in molecular clouds with mass more than 10,000 solar; (3) studies that predict the most massive star that can form in a molecular cloud of a given mass may be underestimating the mass of the cloud because of selection effects; and (4) an energy-balance criterion for collapse of a molecular clouds, similar to the Jeans criterion but using the turbulence kinetic energy of the cloud rather than the thermal energy, may predict where massive stars form.
Hughes V. A.
MacLeod Gordon Curtis
Moriarty-Schieven Gerald H.
No associations
LandOfFree
A search for H II regions embedded in intermediate-mass molecular clouds 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 A search for H II regions embedded in intermediate-mass molecular clouds, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A search for H II regions embedded in intermediate-mass molecular clouds will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-825319