NAOC Open IR
Comparisons of Different Fitting Methods for the Physical Parameters of a Star Cluster Sample of M33 with Spectroscopy and Photometry
Fan,Zhou1; Chen,Bingqiu2; Pang,Xiaoying3; Ren,Juanjuan1; Wang,Song1; Wang,Jing1,4; Tan,Kefeng1; Song,Nan1; Li,Chun1; Zheng,Jie1; Zhao,Gang1,4
2020-11-01
Source PublicationThe Astrophysical Journal Supplement Series
ISSN0067-0049
Volume251Issue:1
AbstractAbstract 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?
KeywordSky surveys Star clusters Andromeda galaxy Spectral energy distribution
DOI10.3847/1538-4365/abb700
Language英语
WOS IDIOP:0067-0049-251-1-abb700
PublisherThe American Astronomical Society
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Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/62636
Collection中国科学院国家天文台
Corresponding AuthorFan,Zhou
Affiliation1.CAS Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, People’s Republic of China zfan@bao.ac.cn
2.South-Western Institute For Astronomy Research, Yunnan University, Chenggong District, Kunming 650500, People’s Republic of China
3.Xi’an Jiaotong-Liverpool University, 111 Ren’ai Road, Suzhou Industrial Park, Suzhou, Jiangsu Province, 215123, People’s Republic of China
4.School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
First Author AffilicationNational Astronomical Observatories, Chinese Academy of Sciences
Corresponding Author AffilicationNational Astronomical Observatories, Chinese Academy of Sciences
Recommended Citation
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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