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A possible formation channel for blue hook stars in globular cluster - II. Effects of metallicity, mass ratio, tidal enhancement efficiency and helium abundance
Lei, Zhenxin1,2; Zhao, Gang2; Zeng, Aihua1; Shen, Lihua1; Lan, Zhongjian1; Jiang DK(姜登凯)3,4; Han ZW(韩占文)3,4; Lei, Zhenxin(Shaoyang Univ, Dept Sci, Shaoyang 422000, Peoples R China)
发表期刊MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
2016-12-01
卷号463期号:4页码:3449-3460
DOI10.1093/mnras/stw2242
产权排序第4完成单位
收录类别SCI
关键词Binaries: General Globular Clusters: General
摘要Employing tidally enhanced stellar wind, we studied in binaries the effects of metallicity, mass ratio of primary to secondary, tidal enhancement efficiency and helium abundance on the formation of blue hook (BHk) stars in globular clusters (GCs). A total of 28 sets of binary models combined with different input parameters are studied. For each set of binary model, we presented a range of initial orbital periods that is needed to produce BHk stars in binaries. All the binary models could produce BHk stars within different range of initial orbital periods. We also compared our results with the observation in the T-eff-logg diagram of GC NGC 2808 and omega Cen. Most of the BHk stars in these two GCs locate well in the region predicted by our theoretical models, especially when C/N-enhanced model atmospheres are considered. We found that mass ratio of primary to secondary and tidal enhancement efficiency have little effects on the formation of BHk stars in binaries, while metallicity and helium abundance would play important roles, especially for helium abundance. Specifically, with helium abundance increasing in binary models, the space range of initial orbital periods needed to produce BHk stars becomes obviously wider, regardless of other input parameters adopted. Our results were discussed with recent observations and other theoretical models.
项目资助者National Natural Science Foundation of China(11503016, 11390371, 11233004, 11573061) ; Youth Fund project of Hunan Provincial Education Department(15B214) ; Natural Science Foundation of China(11390374, 11521303) ; Science and Technology Innovation Talent Programme of the Yunnan Province(2013HA005) ; Chinese Academy of Sciences(XDB09010202, KJZD-EW-M06-01)
语种英语
学科领域天文学
文章类型Article
ISSN0035-8711
URL查看原文
WOS记录号WOS:000393568200003
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]HORIZONTAL-BRANCH STARS ; STELLAR ASTROPHYSICS MESA ; DWARF COOLING CURVE ; NA-O ANTICORRELATION ; HOT SUBDWARF STARS ; OMEGA-CENTAURI ; MILKY-WAY ; MULTIPLE POPULATIONS ; ECLIPSING BINARIES ; EVOLUTIONARY STATUS
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文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/9916
专题大样本恒星演化研究组
中国科学院天体结构与演化重点实验室
通讯作者Lei, Zhenxin(Shaoyang Univ, Dept Sci, Shaoyang 422000, Peoples R China)
作者单位1.Department of Science, Shaoyang University, Shaoyang 422000, China
2.Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China
3.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences,Kunming 650011, China
4.4Yunnan Observatory, Chinese Academy of Sciences, Kunming 650011, China
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Lei, Zhenxin,Zhao, Gang,Zeng, Aihua,et al. A possible formation channel for blue hook stars in globular cluster - II. Effects of metallicity, mass ratio, tidal enhancement efficiency and helium abundance[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2016,463(4):3449-3460.
APA Lei, Zhenxin.,Zhao, Gang.,Zeng, Aihua.,Shen, Lihua.,Lan, Zhongjian.,...&Lei, Zhenxin.(2016).A possible formation channel for blue hook stars in globular cluster - II. Effects of metallicity, mass ratio, tidal enhancement efficiency and helium abundance.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,463(4),3449-3460.
MLA Lei, Zhenxin,et al."A possible formation channel for blue hook stars in globular cluster - II. Effects of metallicity, mass ratio, tidal enhancement efficiency and helium abundance".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 463.4(2016):3449-3460.
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