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Metallicity estimates for old star clusters in M 33
Ma, J; Zhou, X; Chen, JS
2004
发表期刊ASTRONOMY & ASTROPHYSICS
卷号413期号:2页码:563-570
摘要Using the theoretical stellar population synthesis models of BC96, Kong et al. ( 2003) showed that some BATC colors and color indices could be used to disentangle the age and metallicity effect. They found that there is a very good relation between the flux ratio of L-8510/L-9170 and the metallicity for stellar populations older than 1 Gyr. In this paper, based on the Kong et al. results and on the multicolor spectrophotometry of Ma et al. ( 2001, 2002a, b, c), we estimate the metallicities of 31 old star clusters in the nearby spiral galaxy M 33, 23 of which are "true" globular clusters. The results show that most of these old clusters are metal poor. We also find that the ages and metal abundance for these old star clusters of M 33 do not vary with deprojected radial position.
关键词Galaxies : Individual : m 33 Galaxies : Evolution Galaxies : Star Clusters
DOI10.1051/0004-6361:20031556
收录类别SCI
语种英语
WOS记录号WOS:000187356500017
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文献类型期刊论文
条目标识符http://ir.bao.ac.cn/handle/114a11/8919
专题光学天文研究部
作者单位Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
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Ma, J,Zhou, X,Chen, JS. Metallicity estimates for old star clusters in M 33[J]. ASTRONOMY & ASTROPHYSICS,2004,413(2):563-570.
APA Ma, J,Zhou, X,&Chen, JS.(2004).Metallicity estimates for old star clusters in M 33.ASTRONOMY & ASTROPHYSICS,413(2),563-570.
MLA Ma, J,et al."Metallicity estimates for old star clusters in M 33".ASTRONOMY & ASTROPHYSICS 413.2(2004):563-570.
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