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AN ECLIPSING BLUE STRAGGLER IN THE GLOBULAR CLUSTER omega CENTAURI
Li K(李凯)1,2,3; Qian SB(钱声帮)1,2,3; Kai, L (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, POB 110, Kunming 650011, Peoples R China.
Source PublicationASTRONOMICAL JOURNAL
2012-12
Volume144Issue:6Pages:161-165
DOI10.1088/0004-6256/144/6/161
Contribution Rank第1完成单位
Indexed BySCI
KeywordBinaries: Close Binaries: Eclipsing Blue Stragglers Globular Clusters: Individual (Omega Centauri) Stars: Individual (V239)
Abstractomega Centauri is the largest globular cluster in the Milky Way and hence contains the largest number of variable stars within a single cluster. The results of photometric solutions are presented for the EA-type binary V239 in this cluster. According to our analysis, V239 is a typical Algol-type binary. We obtain M = 1.20 +/- 0.10 M-circle dot, R = 1.21 +/- 0.03 R-circle dot, and L = 13.68 +/- 0.63 L-circle dot for the primary component. The secondary component has M = 0.07 +/- 0.02 M-circle dot, R = 0.90 +/- 0.03 R-circle dot, and L = 2.17 +/- 0.14 L-circle dot. The binary system is located in the blue straggler region on the color-magnitude diagram of omega Centauri and the mass of the primary component exceeds the mass of a turnoff star. Therefore, we think that V239 is a blue straggler and that V239 was formed by mass transfer from the present secondary component to the present primary.
Funding OrganizationChinese Natural Science Foundation [11133007, 10973037, 10903026, 11103074] ; West Light Foundation of the Chinese Academy of Sciences
Language英语
Subject AreaAstronomy & Astrophysics
SubtypeArticle
ISSN0004-6256
URL查看原文
Archive Date2012-12-10
WOS IDWOS:000311165400004
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordEXPERIMENT. VARIABLE-STARS ; MAIN-SEQUENCE ; CCD PHOTOMETRY ; BINARY-SYSTEMS ; MASS-TRANSFER ; LIGHT CURVES ; CATALOG ; ORIGIN ; FIELD ; POPULATION
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Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/5859
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 AuthorKai, L (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, 650011 Kunming, China
3.Graduate School of the CAS, 100049 Beijing, China
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Li K,Qian SB,Kai, L . AN ECLIPSING BLUE STRAGGLER IN THE GLOBULAR CLUSTER omega CENTAURI[J]. ASTRONOMICAL JOURNAL,2012,144(6):161-165.
APA Li K,Qian SB,&Kai, L .(2012).AN ECLIPSING BLUE STRAGGLER IN THE GLOBULAR CLUSTER omega CENTAURI.ASTRONOMICAL JOURNAL,144(6),161-165.
MLA Li K,et al."AN ECLIPSING BLUE STRAGGLER IN THE GLOBULAR CLUSTER omega CENTAURI".ASTRONOMICAL JOURNAL 144.6(2012):161-165.
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