AGE AND MASS STUDIES FOR YOUNG STAR CLUSTERS IN M31 FROM SEDS-FIT
文献类型：期刊论文
| 作者 | Wang, Song1,2 ; Ma, Jun1; Fan, Zhou1; Wu, Zhenyu1; Zhang, Tianmeng1; Zou, Hu1; Zhou, Xu1
|
| 刊名 | ASTRONOMICAL JOURNAL
 |
| 出版日期 | 2012-12-01 |
| 卷号 | 144期号:6 |
| 关键词 | galaxies: individual (M31) galaxies: star clusters: general galaxies: stellar content |
| 英文摘要 | These star clusters have been observed as part of the Beijing-Arizona-Taiwan-Connecticut (BATC) Multicolor Sky Survey from 1995 February to 2008 March. The BATC images including these star clusters are taken with 15 intermediate-band filters covering 3000-10000 angstrom. Combined with photometry in the GALEX far- and near-ultraviolet, broadband UBV RI, SDSS ugriz, and infrared JHK(s) of Two Micron All Sky Survey, we obtain their accurate spectral energy distributions (SEDs) from 1538 to 20000 angstrom. We derive these star clusters' ages and masses by comparing their SEDs with stellar population synthesis models. Our results are in good agreement with previous determinations. The mean value of age and mass of young clusters (<2 Gyr) is about 385 Myr and 2 x 10(4) M-circle dot, respectively. There are two distinct peaks in the age distribution, a highest peak at age similar to 60 Myr and a secondary peak around 250 Myr, while the mass distribution shows a single peak around 10(4) M-circle dot. A few young star clusters have two-body relaxation times greater than their ages, indicating that those clusters have not been well dynamically relaxed and therefore have not established the thermal equilibrium. There are several regions showing aggregations of young star clusters around the 10 kpc ring and the outer ring, indicating that the distribution of the young star clusters is well correlated with M31's star-forming regions. The young massive star clusters (age <= 100 Myr and mass >= 10(4) M-circle dot) show apparent concentration around the ring splitting region, suggesting a recent passage of a satellite galaxy (M32) through M31 disk. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000311165400034 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/6254]  |
| 专题 | 国家天文台_光学天文研究部 |
| 作者单位 | 1.Chinese Acad Sci, Natl Astron Observ, Key Lab Opt Astron, Beijing 100012, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Song,Ma, Jun,Fan, Zhou,et al. AGE AND MASS STUDIES FOR YOUNG STAR CLUSTERS IN M31 FROM SEDS-FIT[J]. ASTRONOMICAL JOURNAL,2012,144(6). |
| APA | Wang, Song.,Ma, Jun.,Fan, Zhou.,Wu, Zhenyu.,Zhang, Tianmeng.,...&Zhou, Xu.(2012).AGE AND MASS STUDIES FOR YOUNG STAR CLUSTERS IN M31 FROM SEDS-FIT.ASTRONOMICAL JOURNAL,144(6). |
| MLA | Wang, Song,et al."AGE AND MASS STUDIES FOR YOUNG STAR CLUSTERS IN M31 FROM SEDS-FIT".ASTRONOMICAL JOURNAL 144.6(2012). |
入库方式： OAI收割
来源：国家天文台
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