| 基于颜色的206个星系的星族年龄与金属丰度研究 |
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| 引用本文： | 陈丽,李忠木,张朝元.基于颜色的206个星系的星族年龄与金属丰度研究[J].云南大学学报(自然科学版),2012,0(3):291-297. |
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| 作者姓名： | 陈丽 李忠木 张朝元 |
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| 作者单位： | 大理学院天文学与科技史研究所;大理学院数学与计算机学院 |
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| 基金项目： | 云南省教育厅科学研究基金项目(2011C123,2010Z004) |
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| 摘 要： | 基于颜色分别采用单星星族模型和双星星族模型对206个星系的年龄和金属丰度进行了确定,并将2种结果和Gallazzi等人用谱指数得到的结果进行了比较.结果表明:样本星系的年龄比较老,金属丰度比较高;使用双星星族模型拟合得到的星族年龄和金属丰度比单星星族的偏大;使用颜色拟合得到的星族年龄比谱指数的偏小,金属丰度偏大.
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| 关 键 词： | 星系 星族年龄 金属丰度 颜色 |
Study of the ages and metallicities of 206 galaxies using colours |
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| CHEN Li,LI Zhong-mu,ZHANG Chao-yuan.Study of the ages and metallicities of 206 galaxies using colours[J].Journal of Yunnan University(Natural Sciences),2012,0(3):291-297. |
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| Authors: | CHEN Li LI Zhong-mu ZHANG Chao-yuan |
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| Institution: | 1.Institute of Astronomy and History of Science and Technology,Dali University,Dali 671003,China; 2.College of Mathematics and Computer,Dali University,Dali 671003,China) |
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| Abstract: | Ages and metallicities of 206 galaxies are determined by ssSSPs and binary-star stellar population synthesis models(bsSSPs) respectively on the basis of colours in this article.Then the results are compared and they are compared with the results accquired by Gallazzi et al using lick indices.The results show that:the sample galaxies are old and metal-high.Larger ages and metallicities are obtained when bsSSPs models are used to determine the ages and metallicities of galaxies.When colours are used to determine the ages and metallicities of galaxies,smaller ages and larger metallicities are obtained. |
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| Keywords: | galaxy galaxy age metallicity colour |
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