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DETECTION OF A SECOND-GENERATION BINARY IN THE GLOBULAR CLUSTER omega CENTAURI
Li K(李凯)1,2,3; Qian SB(钱声帮)1,2,3; Leung, KC4; Li, K (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, POB 110, Kunming 650011, Peoples R China.
Source PublicationASTROPHYSICAL JOURNAL
2012-08-10
Volume755Issue:1
DOI10.1088/0004-637X/755/1/83
Contribution Rank第1完成单位
Indexed BySCI
KeywordBinaries: Close Binaries: Eclipsing Globular Clusters: Individual (Omega Centauri) Stars: Early-type Stars: Individual (Nv364)
Abstractomega Centauri is the largest globular cluster in the Milky Way; it is composed of multiple stellar populations. Photometric solutions for the EA-type eclipsing binary NV364 in this cluster indicate that NV364 is a well-detached binary and that both of its components are early-type normal main-sequence stars. There is no evidence for mass transfer between the two components, which are at an early stage in their evolution. Using the luminosity-color relation with optical (BV) observations, we obtain the distance modulus of (m - M) = 14.05 for NV364, which confirms that it is a member of omega Centauri. The ages of the binary components and the first-generation stars in omega Centauri are about 1.19 Gyr and 16 Gyr, respectively. Thus, the binary components are much younger than the first-generation stars. There is therefore a strong basis for considering NV364 to be a second-generation binary in this globular cluster.
Funding OrganizationChinese Natural Science Foundation [11133007, 10973037, 10903026, 11003040] ; West Light Foundation of the Chinese Academy of Sciences
Language英语
Subject AreaAstronomy & Astrophysics
SubtypeArticle
ISSN0004-637X
URL查看原文
Archive Date2012-08-06
WOS IDWOS:000306909500083
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordMAIN-SEQUENCE ; LIGHT CURVES ; CATALOG ; STARS ; EVOLUTION ; SYSTEMS ; ORIGIN ; GALAXY
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Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/5864
Collection双星与变星研究组
中国科学院天体结构与演化重点实验室
Corresponding AuthorLi, K (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, POB 110, Kunming 650011, Peoples R China.
Affiliation1.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, P.O. Box 110, 650011 Kunming, China
2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, P.O. Box 110, 650011 Kunming, China
3.Graduate School of the CAS, Yuquan Road 19, Shijingshan Block, 100049 Beijing, China
4.Department of Physics and Astronomy, University of Nebraska, 1400 R Street Lincoln, NE 68588, USA
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Li K,Qian SB,Leung, KC,et al. DETECTION OF A SECOND-GENERATION BINARY IN THE GLOBULAR CLUSTER omega CENTAURI[J]. ASTROPHYSICAL JOURNAL,2012,755(1).
APA Li K,Qian SB,Leung, KC,&Li, K .(2012).DETECTION OF A SECOND-GENERATION BINARY IN THE GLOBULAR CLUSTER omega CENTAURI.ASTROPHYSICAL JOURNAL,755(1).
MLA Li K,et al."DETECTION OF A SECOND-GENERATION BINARY IN THE GLOBULAR CLUSTER omega CENTAURI".ASTROPHYSICAL JOURNAL 755.1(2012).
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