The Ages of M31 Star Clusters: Spectral Energy Distribution versus Color-Magnitude Diagram
文献类型：期刊论文
| 作者 | Fan, Zhou1 ; Li, Zhongmu2; Zhao, Gang1,3
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| 刊名 | ASTRONOMICAL JOURNAL
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| 出版日期 | 2018-11-01 |
| 卷号 | 156期号:5页码:13 |
| 关键词 | galaxies: individual (M31) galaxies: star clusters: general globular clusters: general |
| ISSN号 | 0004-6256 |
| DOI | 10.3847/1538-3881/aae1aa |
| 英文摘要 | It is well-known that fitting Color-Magnitude Diagrams (CMDs) to theoretical isochrones is the main method to determine star cluster ages. However, when CMDs are not available, the Spectral Energy Distribution (SED)-fitting technique is the only other approach, although it suffers the age-metallicity-reddening degeneracy. In this work, we gather the ages, metallicities, and masses of dozens of M31 star clusters from the CMD-fitting with Hubble Space Telescope images from the literature for comparison. We check the reliability of the SED-fitting results with different models, i.e., Bruzual & Charlot model (BC03), Galaxy Evolutionary Synthesis Models (GALEV), and Advanced Stellar Population Synthesis (ASPS) for the simple stellar populations (SSPs) with single stars (ss)-SSP/binary-star (bs)-SSPs models. The photometry bands includes the Galaxy Evolution Explorer GALEX FUV/NUV bands, optical/near-infrared UBVRIJHK bands, as well as the Wide-field Infrared Survey Explorer (WISE) W1/W2 bands. The comparisons show that the SED-fitting ages agree well with the CMD-fitting ages, either with the fixed metallicity or with the free metallicity for both the BC03 and the GALEV model. However, for the ASPS models, it seems that SED-fitting results are systematically older than the CMD ages, especially for the ages log t < 9.0 (year). The fitting also shows that the GALEX FUV/NUV-band are more important than the WISE W1/W2 for constraining the ages, which confirms the previous findings. We also derived the masses of our sample star clusters from the BC03 and GALEV models and it is found that the values agree well with those in the literature. |
| WOS关键词 | STELLAR POPULATION SYNTHESIS ; INITIAL MASS FUNCTION ; GLOBULAR-CLUSTERS ; SYSTEMATIC UNCERTAINTIES ; THEORETICAL ISOCHRONES ; BINARY FRACTION ; PHOTOMETRY ; EVOLUTION ; MODELS ; PARAMETERS |
| 资助项目 | National Program for Key Research and Development Project[2016YFA0400804] ; National Key Basic Research Program of China (973 Program)[2015CB857002] ; National Natural Science Foundation of China (NFSC)[11390371] ; National Natural Science Foundation of China (NFSC)[11563002] ; National Natural Science Foundation of China (NFSC)[U1631102] ; Sino-German Center Project[GZ 1284] ; Youth Innovation Promotion Association, Chinese Academy of Sciences |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000447164500001 |
| 出版者 | IOP PUBLISHING LTD |
| 资助机构 | National Program for Key Research and Development Project ; National Program for Key Research and Development Project ; National Key Basic Research Program of China (973 Program) ; National Key Basic Research Program of China (973 Program) ; National Natural Science Foundation of China (NFSC) ; National Natural Science Foundation of China (NFSC) ; Sino-German Center Project ; Sino-German Center Project ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; National Program for Key Research and Development Project ; National Program for Key Research and Development Project ; National Key Basic Research Program of China (973 Program) ; National Key Basic Research Program of China (973 Program) ; National Natural Science Foundation of China (NFSC) ; National Natural Science Foundation of China (NFSC) ; Sino-German Center Project ; Sino-German Center Project ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; National Program for Key Research and Development Project ; National Program for Key Research and Development Project ; National Key Basic Research Program of China (973 Program) ; National Key Basic Research Program of China (973 Program) ; National Natural Science Foundation of China (NFSC) ; National Natural Science Foundation of China (NFSC) ; Sino-German Center Project ; Sino-German Center Project ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; National Program for Key Research and Development Project ; National Program for Key Research and Development Project ; National Key Basic Research Program of China (973 Program) ; National Key Basic Research Program of China (973 Program) ; National Natural Science Foundation of China (NFSC) ; National Natural Science Foundation of China (NFSC) ; Sino-German Center Project ; Sino-German Center Project ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/23022]  |
| 专题 | 中国科学院国家天文台 |
| 通讯作者 | Fan, Zhou |
| 作者单位 | 1.Chinese Acad Sci, Natl Astron Observ, Key Lab Opt Astron, Beijing 100101, Peoples R China 2.Dali Coll, Dali 671000, Yunan, Peoples R China 3.Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Fan, Zhou,Li, Zhongmu,Zhao, Gang. The Ages of M31 Star Clusters: Spectral Energy Distribution versus Color-Magnitude Diagram[J]. ASTRONOMICAL JOURNAL,2018,156(5):13. |
| APA | Fan, Zhou,Li, Zhongmu,&Zhao, Gang.(2018).The Ages of M31 Star Clusters: Spectral Energy Distribution versus Color-Magnitude Diagram.ASTRONOMICAL JOURNAL,156(5),13. |
| MLA | Fan, Zhou,et al."The Ages of M31 Star Clusters: Spectral Energy Distribution versus Color-Magnitude Diagram".ASTRONOMICAL JOURNAL 156.5(2018):13. |
入库方式： OAI收割
来源：国家天文台
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