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Metallicity estimates for old star clusters in M 33
Ma, J; Zhou, X; Chen, JS
AbstractUsing 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.
KeywordGalaxies : Individual : m 33 Galaxies : Evolution Galaxies : Star Clusters
Indexed BySCI
WOS IDWOS:000187356500017
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Cited Times:13[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
AffiliationChinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
Recommended Citation
GB/T 7714
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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