YNAO OpenIR  > 大样本恒星演化研究组
The formation of subdwarf B stars
Han ZW(韩占文)1; Podsiadlowski, P2; Maxted, PFL3; Marsh, TR4; Ivanova, N5
会议录名称ASTRONOMICAL SOCIETY OF THE PACIFIC (ASP) CONFERENCE SERIES - EXOTIC STARS AS CHALLENGES TO EVOLUTION, PROCEEDINGS
2002
卷号279
页码285-290
会议录编者/会议主办者Tout, CA; VanHamme, W
产权排序第1完成单位
收录类别CPCI
会议名称187 Colloquium on Exotic Stars as Challenges to Evolution
会议日期2002-03-04
会议地点MIAMI, FL
会议赞助商Int Astron Union; Max-Planck Inst Astron; Florida Int Univ, Div Sponsored Res; Florida Int Univ, Coll Art & Sci; Florida Int Univ, Dept Phys
摘要

We performed full binary evolution calculations and carried out binary population synthesis studies in order to investigate the formation of subdwarf B (sdB) stars via, the channels of stable Roche lobe overflow (RLOF), common envelope ejection and helium white dwarf mergers. Our model is successful in the explanation of observational properties of sdB stars, e.g. we explained the orbital period - minimum companion mass (log P - M-comp) diagram, the effective temperature - surface gravity (T-eff - log g) diagram, the orbital period distribution, the log(gtheta(4)) (theta = 5040/T-eff) distribution, the mass function distribution, the binary. fraction of sdB stars, the fraction of sdB binaries with WD companions, the birth rates, the space number densities, etc. We conclude that (a) the first RLOF needs to be more stabilized than commonly assumed, (b) the first stable RLOF is not conservative, (c) common envelope ejection is very efficient.

项目资助者N/A
语种英语
学科领域天文学 ; 天体物理学 ; 恒星与银河系
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1-58381-122-2
URL查看原文
归档日期2003-04-02
WOS记录号WOS:000180451700035
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]Horizontal-branch Stars ; Low-mass ; Stellar Evolution ; Sdb Stars ; Parameters ; Objects ; Birthrate ; Origin ; Dwarfs
引用统计
被引频次:1[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/114a53/221
专题大样本恒星演化研究组
作者单位1.Yunnan Observatory, NAOC, CAS, Kunming 650011, P. R. China
2.Astrophysics, NAPL, Oxford University, Keble Road, Oxford OX1 3RH, UK
3.Department of Physics, Keele University, Staffordshire ST5 5BG, UK
4.University of Southampton, Department of Physics & Astronomy, Highfield, Southampton S017 1BJ, UK
5.Department of Physics & Astronomy, Northwestern University, Evanston, IL 60208, USA
第一作者单位中国科学院云南天文台
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Han ZW,Podsiadlowski, P,Maxted, PFL,et al. The formation of subdwarf B stars[C]//Tout, CA; VanHamme, W. 390 ASHTON AVE, SAN FRANCISCO, CA 94112 USA:ASTRONOMICAL SOC PACIFIC,2002:285-290.
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