Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999sf99.proc..371p&link_type=abstract
Star Formation 1999, Proceedings of Star Formation 1999, held in Nagoya, Japan, June 21 - 25, 1999, Editor: T. Nakamoto, Nobeyam
Astronomy and Astrophysics
Astrophysics
Scientific paper
The by-product of the OGLE microlensing survey is huge amount of high quality standard BVI-band photometric data which can be adressed to large variety of issues of modern astrophysics. Observations obtained in 2.4 and 3.5 square degree regions in the SMC and LMC led to detection of about 700 star clusters. In a series of catalogs we present finding charts and lists of those clusters containing precise coordinates, size and cross--identification. For about 200 clusters we derive age using standard procedure of isochrone fitting. Based on that data we present distribution of size and age for clusters from the Magellanic Clouds. Distribution of size of clusters from the SMC and LMC are very similar which suggest similar processes of formation and disruption of clusters in these galaxies. We find that the SMC contains more large clusters than the LMC. It may be explained by weaker gravitational field of the SMC. Distribution of age of clusters in the LMC and SMC are very different. Cluster formation history in the LMC reveals periods of increased cluster formation and quiescent periods. No such features are visible in the uniform distribution of age of clusters from the SMC.
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