Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998acaps..18..302s&link_type=abstract
Acta Astrophys. Sin., Vol. 18, No. 3, p. 302 - 312
Astronomy and Astrophysics
Astrophysics
Molecular Clouds: Star Formation, Molecular Clouds: H Ii Regions, Molecular Clouds: Classification
Scientific paper
A systematic comparison between molecular clouds in different evolutionary stages and processes of star formation is made over the range of 8° to 38° in Galactic longitude and -1° to +1° in Galactic latitude by using the Massachusetts-Stony Brook Survey data of 12CO in the Galactic plane and the IRAS Infrared Sky Survey image data. Molecular clouds in different evolutionary stages are identified and divided into four groups ranging from young clouds to evolved clouds, and their main characteristics and relations to the processes of star formation are analysed. The Galactic-longitude distributions of ultracompact H II regions and candidate protostars as well as the ratio between H II region-molecular cloud and candidate protostar-molecular cloud associations are analysed statistically. The results indicate that star formation activities are currently still going on in our Galaxy.
Sun Jin
Sun Yanchun
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