Star Formation Activity in Giant Molecular Clouds in the LMC

Details Star Formation Activity in Giant Molecular Clouds in the LMC Star Formation Activity in Giant Molecular Clouds in the LMC

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...20916011o&link_type=abstract

2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #160.11; Bulletin of the American Astronomical Society,

Astronomy and Astrophysics

Astronomy

Scientific paper

The formation of stellar clusters is one of the biggest issues in Astronomy. In our Galaxy, the currently formed clusters are only open clusters; no "young" globular clusters have been observed. On the other hand, in the LMC, stellar clusters called "populous clusters" are found to be forming at present. Comparative studies of young stars as well as the properties of giant molecular clouds both in our Galaxy and LMC are therefore of vital importance. Spizter/SAGE dataset provides most comprehensive and complete knowledge on how and where the YSOs are distributed in the LMCs for the first time. We present here the statistical comparison of the distribution of YSOs with that of CO molecular clouds detected by NANTEN CO survey throughout the entire galaxy. The distribution of SAGE sources with a cold spectrum shows good correlation with that of molecular clouds, indicating that these sources are good candidates for YSOs. Star formation activities in the molecular clouds were estimated, and we found that the star formation activity shows stronger correlation with the cloud mass than in the Galaxy. This may explain active star formation in the most massive clouds and the existence of giant molecular clouds without high-mass star formation, which are rare in the Galaxy.

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