| Age and Mass Estimates for 41 Star Clusters in M33 |
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| 作者姓名： | Jun Ma Xu Zhou and Jian-Sheng Chen
National Astronomical Observatories Chinese Academy of Sciences Beijing |
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| 作者单位： | Jun Ma，Xu Zhou and Jian-Sheng Chen
National Astronomical Observatories，Chinese Academy of Sciences，Beijing 100012; |
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| 基金项目： | Supported by the National Natural Science Foundation of China |
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| 摘 要： | 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 & Chariot. Also, we calculate the mass of these star clusters using the theoretical M/Lv 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⊙. M33 frames were observed as a part of the BATC Multicolor Survey of the sky in 13 intermediate-band niters from 3800 to 10 OOOA. The relation between age and mass confirms that the sample star cluster masses systematically decrease from the oldest to the youngest.
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| 关 键 词： | 恒星 估计 评价 光度测量 |
Age and Mass Estimates for 41 Star Clusters in M33 |
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| Jun Ma,Xu Zhou and Jian-Sheng Chen
National Astronomical Observatories,Chinese Academy of Sciences,Beijing ,.Age and Mass Estimates for 41 Star Clusters in M33[J].Chinese Journal of Astronomy and Astrophysics,2004,4(2):125-132. |
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| Authors: | Jun Ma Xu Zhou and Jian-Sheng Chen
National Astronomical Observatories Chinese Academy of Sciences Beijing |
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| Institution: | Jun Ma,Xu Zhou and Jian-Sheng Chen
National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100012, |
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| Abstract: | |
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| Keywords: | galaxies: individual (M33) - galaxies: evolution - galaxies: star clusters |
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