Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004chjaa...4..125m&link_type=abstract
Chinese Journal of Astronomy & Astrophysics, Vol. 4, p. 125-132
Astronomy and Astrophysics
Astrophysics
7
Galaxies: Individual (M33), Galaxies: Evolution, Galaxies: Star Clusters
Scientific paper
In this second paper of our series, we estimate the age of 41 star clusters, which were detected by Melnick & D'odorico in the nearby spiral galaxy M33, by comparing the integrated photometric measurements with theoretical stellar population synthesis models of Bruzual & Charlot. Also, we calculate the mass of these star clusters using the theoretical M/L_V ratio. The results show that, these star clusters formed continuously in M33 from ˜ 7× 106 -- 1010 years and have masses between ˜ 103 and 2 ×106 M&sun;. M33 frames were observed as a part of the BATC Multicolor Survey of the sky in 13 intermediate-band filters from 3800 to 10 000 Å. The relation between age and mass confirms that the sample star cluster masses systematically decrease from the oldest to the youngest.
Chen Jian-Sheng
Ma Jun
Zhou Xu
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