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Tidally Enhanced Stellar Wind in Binaries as a Second Parameter for the Horizontal Branch Morphology of Globular Clusters
Han ZW(韩占文); Lei ZX(雷振新)
会议录名称Astronomical Society of the Pacific (ASP) Conference Series - 6th Meeting on Hot Subdwarf Stars and Related Objects
2014-04
卷号481
页码213-219
会议录编者/会议主办者VanGrootel, V; Green, EM; Fontaine, G; Charpinet, S
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收录类别其他
会议名称6th Meeting on Hot Subdwarf Stars and Related Objects
会议日期2013-05-19
会议地点Steward Observatory, University of Arizona, Tucson, Arizona, USA
会议赞助商Steward Observ; Univ Arizona Fdn
摘要

Metallicity is the first parameter to influence the horizontal branch morphology of globular clusters. It has been found, however, that some other parameters may also play an important role in affecting the morphology. While the nature of these other important parameters remains unclear, they are believed to be correlated with the mass loss during the red giant stages, from which the horizontal branch stars have descended. Unfortunately, the mass loss during the red giant stages of stellar evolution are poorly understood at present. In this talk, we investigate the physical consequences of tidally-enhanced stellar winds during the evolution of binary stars on enhancing the mass loss of red giant primaries, with accompanying effects for the horizontal branch morphology of globular clusters. In a binary system, the stellar wind of the red giant primary star may be largely enhanced by its companion star. Different separation of the binary system, however, will lead to a different mass loss rate of the primary star. We found that red, blue, and extreme horizontal branch stars are all produced under the effects of tidally-enhanced stellar wind without any additional assumptions on the mass loss dispersion. Furthermore, the horizontal branch morphology is found to be insensitive to the tidal enhancement parameter, B.

资助项目Natural Science Foundation of China[11033008] ; Chinese Academy of Sciences[KJCX2-YW-T24]
项目资助者Natural Science Foundation of China ; Chinese Academy of Sciences
语种英语
学科领域天文学 ; 天体物理学 ; 恒星与银河系
学科门类理学 ; 理学::天文学
文章类型Proceedings Paper
出版者ASTRONOMICAL SOC PACIFIC
出版地390 ASHTON AVE, SAN FRANCISCO, CA 94112 USA
ISBN号978-1-58381-846-6
URL查看原文
归档日期2014-09-17
WOS记录号WOS:000398425600028
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]Subdwarf-b-stars ; Evolution ; Origin ; Planets
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被引频次:2[WOS]   [WOS记录]     [WOS相关记录]
文献类型会议论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/9651
专题大样本恒星演化研究组
通讯作者Han ZW(韩占文)
作者单位Key Laboratory for the Structure and Evolution of Celestial Objects, Yunnan Observatories, Chinese Academy of Sciences, Kunming, 650011, P.R. China
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Han ZW,Lei ZX. Tidally Enhanced Stellar Wind in Binaries as a Second Parameter for the Horizontal Branch Morphology of Globular Clusters[C]//VanGrootel, V; Green, EM; Fontaine, G; Charpinet, S. 390 ASHTON AVE, SAN FRANCISCO, CA 94112 USA:ASTRONOMICAL SOC PACIFIC,2014:213-219.
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