| Estimating the Metallicity of Old Star Clusters in M33 |
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| 作者姓名： | JunMa XuZhou |
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| 作者单位： | Jun Ma，Xu Zhou，Hong Wu，Jian-Sheng Chen，Zhao-Ji Jiang，Sui-Jian Xue and Jin Zhu National Astronomical Observatories，Chinese Academy of Sciences，Beijing 100012 |
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| 基金项目： | 国家自然科学基金，Arizona State University |
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| 摘 要： | 1 INTRODUCTION Globular clusters are thought to be among the oldest radiant objects in the Universe. Thestudies of these systems have played a key role in the development of our understanding of theUniverse, including the fundamental question of the age of the Universe. The globular clustersof Milky Way can be used to probe the way in which our Galaxy formed. Studies of similarclusters in other galaxies can also provide us the properties of those galaxies in the early periodafter their …
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| 关 键 词： | 银河系 演化 星云 金属物质 |
Estimating the Metallicity of Old Star Clusters in M33 |
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| Jun Ma,Xu Zhou,Hong Wu,Jian-Sheng Chen,Zhao-Ji Jiang,Sui-Jian Xue,JIN Zhu.Estimating the Metallicity of Old Star Clusters in M33[J].Chinese Journal of Astronomy and Astrophysics,2002,2(2):127-132. |
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| Authors: | Jun Ma Xu Zhou Hong Wu Jian-Sheng Chen Zhao-Ji Jiang Sui-Jian Xue JIN Zhu |
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| Institution: | NationalAstronomicalObservatories,ChineseAcademyofSciences,Beijing100012 |
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| Abstract: | Based on the method proposed by Kong et al. and on the multi-color spectrophotometry by Ma et al., we estimate the metallicities of 16 old star clusters in the nearby spiral galaxy M33, ten of which are halo globular clusters. These old clusters are all metal poor, the range of metallicity (Fe/H]) is from -0.14 to -2.12. In general, our results are consistent with those derived by other methods, such as integrated spectra and photometry, and our study confirms the reliability of the method of Kong et al. |
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| Keywords: | galaxies: individual (M33) galaxies: evolution ? galaxies: star clusters |
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