Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980aj.....85.1612i&link_type=abstract
Astronomical Journal, vol. 85, Dec. 1980, p. 1612-1630.
Astronomy and Astrophysics
Astronomy
31
Carbon Monoxide, H Ii Regions, Interstellar Gas, Molecular Clouds, Stellar Evolution, Early Stars, Millimeter Waves, Nebulae, Position (Location), Star Clusters, Stellar Mass, Telescopes, Velocity
Scientific paper
Maps of the CO emission at a resolution of 8 arcmin are presented for seven H II regions or H II region groups; the results of a search for CO emission near seven more are also given. CO was detected near all but two of the observed objects. The distribution of (C-12)O and (C-13)O near S142, S157, and S159 was mapped at a resolution of 2.3 arcmin. The S147/S153 group of H II regions is shown to consist of physically related objects; it is a region of active star formation. The results show a complicated molecular cloud structure near most observed H II regions. There is a tendency for decreasing CO cloud mass when H II regions in more evolved stages are observed. The relevance of these results for the understanding of individual H II region/molecular cloud complexes, and for general aspects of the star-formation process, is briefly discussed.
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