Comparisons of Different Fitting Methods for the Physical Parameters of a Star Cluster Sample of M33 with Spectroscopy and Photometry
文献类型：期刊论文
| 作者 | Fan,Zhou3 ; Chen,Bingqiu4; Pang,Xiaoying1; Ren,Juanjuan3; Wang,Song3; Wang,Jing2,3; Tan,Kefeng3; Song,Nan3; Li,Chun3; Zheng,Jie3
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| 刊名 | The Astrophysical Journal Supplement Series
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| 出版日期 | 2020-11-01 |
| 卷号 | 251期号:1 |
| ISSN号 | 0067-0049 |
| 关键词 | Sky surveys Star clusters Andromeda galaxy Spectral energy distribution |
| DOI | 10.3847/1538-4365/abb700 |
| 英文摘要 | Abstract Star clusters are good tracers for formation and evolution of galaxies. We compared different fitting methods by using spectra (or by combining photometry) to determine the physical parameters. We choose a sample of 17 star clusters in M33, which previously lacked spectroscopic observations. The low-resolution spectra were taken with the Xinglong 2.16 m reflector of NAOC. The photometry used in the fitting includes uSC and vSAGE bands from the SAGE survey, as well as the published UBVRI and ugriz photometry. We first derived ages and metallicities with the ULySS (Vazdekis et al. and pegase-hr) simple stellar population model and the Bruzual & Charlot stellar population synthesis models for the full-spectrum fitting. The fitting results of both the BC03 and ULySS models seem consistent with those of previous works as well. Then, we add the SAGE uSC and vSAGE photometry in the spectroscopic fitting with the BC03 models. It seems that the results become much better, especially for the Padova 2000+Chabrier initial mass function set. Finally, we add more photometry data, UBVRI and ugriz, in the fitting, and we found that the results do not improve significantly. Therefore, we conclude that the photometry is useful for improving the fitting results, especially for the blue bands (λ? |
| 语种 | 英语 |
| 出版者 | The American Astronomical Society |
| WOS记录号 | IOP:0067-0049-251-1-ABB700 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/62635]  |
| 专题 | 中国科学院国家天文台 |
| 通讯作者 | Fan,Zhou |
| 作者单位 | 1.Xi’an Jiaotong-Liverpool University, 111 Ren’ai Road, Suzhou Industrial Park, Suzhou, Jiangsu Province, 215123, People’s Republic of China 2.School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China 3.CAS Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, People’s Republic of China zfan@bao.ac.cn 4.South-Western Institute For Astronomy Research, Yunnan University, Chenggong District, Kunming 650500, People’s Republic of China |
| 推荐引用方式 GB/T 7714 | Fan,Zhou,Chen,Bingqiu,Pang,Xiaoying,et al. Comparisons of Different Fitting Methods for the Physical Parameters of a Star Cluster Sample of M33 with Spectroscopy and Photometry[J]. The Astrophysical Journal Supplement Series,2020,251(1). |
| APA | Fan,Zhou.,Chen,Bingqiu.,Pang,Xiaoying.,Ren,Juanjuan.,Wang,Song.,...&Zhao,Gang.(2020).Comparisons of Different Fitting Methods for the Physical Parameters of a Star Cluster Sample of M33 with Spectroscopy and Photometry.The Astrophysical Journal Supplement Series,251(1). |
| MLA | Fan,Zhou,et al."Comparisons of Different Fitting Methods for the Physical Parameters of a Star Cluster Sample of M33 with Spectroscopy and Photometry".The Astrophysical Journal Supplement Series 251.1(2020). |
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