STAR CLUSTERS IN M33: UPDATED UBVRI PHOTOMETRY, AGES, METALLICITIES, AND MASSES
文献类型：期刊论文
| 作者 | Fan, Zhou1 ; de Grijs, Richard2,3
|
| 刊名 | ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
 |
| 出版日期 | 2014-04-01 |
| 卷号 | 211期号:2 |
| 关键词 | catalogs galaxies: individual (M33) galaxies: star clusters: general globular clusters: general |
| 英文摘要 | The photometric characterization of M33 star clusters is far from complete. In this paper, we present homogeneous UBVRI photometry of 708 star clusters and cluster candidates in M33 based on archival images from the Local Group Galaxies Survey, which covers 0.8 deg(2) along the galaxy's major axis. Our photometry includes 387, 563, 616, 580, and 478 objects in the UBVRI bands, respectively, of which 276, 405, 430, 457, and 363 do not have previously published UBVRI photometry. Our photometry is consistent with previous measurements (where available) in all filters. We adopted Sloan Digital Sky Survey ugriz photometry for complementary purposes, as well as Two Micron All Sky Survey near-infrared JHK photometry where available. We fitted the spectral-energy distributions of 671 star clusters and candidates to derive their ages, metallicities, and masses based on the updated parsec simple stellar populations synthesis models. The results of our chi(2) minimization routines show that only 205 of the 671 clusters (31%) are older than 2 Gyr, which represents a much smaller fraction of the cluster population than that in M31 (56%), suggesting that M33 is dominated by young star clusters (< 1 Gyr). We investigate the mass distributions of the star clusters-both open and globular clusters-in M33, M31, the Milky Way, and the Large Magellanic Cloud. Their mean values are log(M-cl/M-circle dot) = 4.25, 5.43, 2.72, and 4.18, respectively. The fraction of open to globular clusters is highest in the Milky Way and lowest in M31. Our comparisons of the cluster ages, masses, and metallicities show that our results are basically in agreement with previous studies (where objects in common are available); differences can be traced back to differences in the models adopted, the fitting methods used, and stochastic sampling effects. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000334028600006 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/6431]  |
| 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.Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China 3.Peking Univ, Dept Astron, Beijing 100871, Peoples R China |
| 推荐引用方式 GB/T 7714 | Fan, Zhou,de Grijs, Richard. STAR CLUSTERS IN M33: UPDATED UBVRI PHOTOMETRY, AGES, METALLICITIES, AND MASSES[J]. ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,2014,211(2). |
| APA | Fan, Zhou,&de Grijs, Richard.(2014).STAR CLUSTERS IN M33: UPDATED UBVRI PHOTOMETRY, AGES, METALLICITIES, AND MASSES.ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,211(2). |
| MLA | Fan, Zhou,et al."STAR CLUSTERS IN M33: UPDATED UBVRI PHOTOMETRY, AGES, METALLICITIES, AND MASSES".ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES 211.2(2014). |
入库方式： OAI收割
来源：国家天文台
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。