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AN ECLIPSING BLUE STRAGGLER IN THE GLOBULAR CLUSTER omega CENTAURI

文献类型：期刊论文

作者Li K(李凯)1,2,3; Qian SB(钱声帮)1,2,3
刊名ASTRONOMICAL JOURNAL
出版日期2012-12
卷号144期号:6页码:161-165
关键词binaries: close binaries: eclipsing blue stragglers globular clusters: individual (omega Centauri) stars: individual (V239)
ISSN号0004-6256
产权排序第一完成单位
通讯作者Kai, L (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, POB 110, Kunming 650011, Peoples R China.
英文摘要omega 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.
WOS标题词Science & Technology ; Physical Sciences
学科主题Astronomy & Astrophysics
类目[WOS]Astronomy & Astrophysics
研究领域[WOS]Astronomy & Astrophysics
关键词[WOS]EXPERIMENT. VARIABLE-STARS ; MAIN-SEQUENCE ; CCD PHOTOMETRY ; BINARY-SYSTEMS ; MASS-TRANSFER ; LIGHT CURVES ; CATALOG ; ORIGIN ; FIELD ; POPULATION
收录类别SCI
原文出处http://iopscience.iop.org/1538-3881/144/6/161/
语种英语
WOS记录号WOS:000311165400004
源URL[http://ir.ynao.ac.cn/handle/114a53/5859]  
专题云南天文台_双星与变星研究组
云南天文台_中国科学院天体结构与演化重点实验室
作者单位1.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
推荐引用方式
GB/T 7714		 Li K,Qian SB. AN ECLIPSING BLUE STRAGGLER IN THE GLOBULAR CLUSTER omega CENTAURI[J]. ASTRONOMICAL JOURNAL,2012,144(6):161-165.
APA Li K,&Qian SB.(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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来源：云南天文台

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