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Classification of stellar populations in globular clusters
Wang, Yue1,2; Zhao, Gang1,2; Li, Hai-Ning1
2017-05-01
Source PublicationRESEARCH IN ASTRONOMY AND ASTROPHYSICS
Volume17Issue:5
AbstractPossessing multiple stellar populations has been accepted as a common feature of globular clusters (GCs). Different stellar populations manifest themselves with different chemical features, e.g. the well-known O-Na anti-correlation. Generally, the first (primordial) population has O and Na abundances consistent with those of field stars with similar metallicity; while the second (polluted) population is identified by their Na overabundance and O deficiency. The fraction of the populations is an important constraint on the GC formation scenario. Several methods have been proposed for the classification of GC populations. Here we examine a criterion derived based on the distribution of Galactic field stars, which relies on Na abundance as a function of [Fe/H], to distinguish first and second stellar populations in GCs. By comparing the first population fractions of 17 GCs estimated by the field star criterion with those in the literature derived by methods related to individual GCs, we find that the field star criterion tends to overestimate the first population fractions. The population separation methods, which are related to an individual GC sample, are recommended because the diversity of GCs can be taken into consideration. Currently, more caution should be exercised if one wants to regard field stars as a reference for the identification of a GC population. However, further study on the connection between field stars and GCs populations is still needed.
SubtypeArticle
KeywordStars: Abundances Globular Clusters: General
WOS HeadingsScience & Technology ; Physical Sciences
Funding OrganizationNational Natural Science Foundation of China(11303040 ; National Natural Science Foundation of China(11303040 ; Strategic Priority Research Program "The Emergence of Cosmological Structures of the Chinese Academy of Sciences"(XDB09000000) ; Strategic Priority Research Program "The Emergence of Cosmological Structures of the Chinese Academy of Sciences"(XDB09000000) ; 11390371 ; 11390371 ; 11573032 ; 11573032 ; 1233004) ; 1233004) ; National Natural Science Foundation of China(11303040 ; National Natural Science Foundation of China(11303040 ; Strategic Priority Research Program "The Emergence of Cosmological Structures of the Chinese Academy of Sciences"(XDB09000000) ; Strategic Priority Research Program "The Emergence of Cosmological Structures of the Chinese Academy of Sciences"(XDB09000000) ; 11390371 ; 11390371 ; 11573032 ; 11573032 ; 1233004) ; 1233004)
DOI10.1088/1674-4527/17/5/48
WOS KeywordUV LEGACY SURVEY ; ROTATING MASSIVE STARS ; NA-O ANTICORRELATION ; ABUNDANCE PATTERNS ; AGB ; EVOLUTION ; YIELDS
Indexed BySCI
Language英语
Funding OrganizationNational Natural Science Foundation of China(11303040 ; National Natural Science Foundation of China(11303040 ; Strategic Priority Research Program "The Emergence of Cosmological Structures of the Chinese Academy of Sciences"(XDB09000000) ; Strategic Priority Research Program "The Emergence of Cosmological Structures of the Chinese Academy of Sciences"(XDB09000000) ; 11390371 ; 11390371 ; 11573032 ; 11573032 ; 1233004) ; 1233004) ; National Natural Science Foundation of China(11303040 ; National Natural Science Foundation of China(11303040 ; Strategic Priority Research Program "The Emergence of Cosmological Structures of the Chinese Academy of Sciences"(XDB09000000) ; Strategic Priority Research Program "The Emergence of Cosmological Structures of the Chinese Academy of Sciences"(XDB09000000) ; 11390371 ; 11390371 ; 11573032 ; 11573032 ; 1233004) ; 1233004)
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000405574100009
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/8866
Collection光学天文研究部
Affiliation1.Chinese Acad Sci, Key Lab Opt Astron, Natl Astron Observ, Beijing 100012, Peoples R China
2.Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Wang, Yue,Zhao, Gang,Li, Hai-Ning. Classification of stellar populations in globular clusters[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2017,17(5).
APA Wang, Yue,Zhao, Gang,&Li, Hai-Ning.(2017).Classification of stellar populations in globular clusters.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,17(5).
MLA Wang, Yue,et al."Classification of stellar populations in globular clusters".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 17.5(2017).
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