Formation of Populous Clusters; What We Have Learned from a Complete CO Survey of the Large Magellanic Cloud with NANTEN

Details Formation of Populous Clusters; What We Have Learned from a Complete CO Survey of the Large Magellanic Cloud with NANTEN Formation of Populous Clusters; What We Have Learned from a Complete CO Survey of the Large Magellanic Cloud with NANTEN

Dec 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999sf99.proc...18f&link_type=abstract

Star Formation 1999, Proceedings of Star Formation 1999, held in Nagoya, Japan, June 21 - 25, 1999, Editor: T. Nakamoto, Nobeyam

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Scientific paper

A new survey of the LMC has been completed in the J = 1--0 carbon monoxide emission at 2.6 mm wavelength with NANTEN. This survey has revealed 107 giant molecular clouds, the first complete sample of giant molecular clouds in a single galaxy at a linear resolution of ~ 40 pc. The molecular clouds exhibit a good spatial correlation with youngest stellar clusters often associated with the large HII regions. The ages of the clusters are fairly small, <=10 Myr, indicating that cluster formation is on-going in these clouds. On the other hand, they show little correlation with older clusters or with supernova remnants, suggesting that the molecular clouds are being dissipated rapidly in a several Myrs, probably due to the UV photons of massive stars in clusters. A unique property of the clusters in the LMC is that they are gravitationally bound, containing ~103 -- 104 stars, similar to globular clusters in the Galaxy. Nonetheless, the cloud properties obtained in the present study appear quite similar to those of the Galactic clouds in terms of the mass spectrum. Possible causes for the formation populous clusters are discussed.

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