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The sdB Mass - Orbital Period Relation for Long-Orbital-Period SdB+MS Binaries
Chen XF(陈雪飞)1,2; Han ZW(韩占文)1,2; Deca, J.3; Podsiadlowski, P.4
会议录名称ASP Conference Series - 6th Meeting on Hot Subdwarf Stars and Related Objects
2014-04
卷号481
页码205-212
会议录编者/会议主办者VanGrootel, V; Green, EM; Fontaine, G; Charpinet, S
产权排序第1完成单位
收录类别CPCI
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

Recent observations discovered several long-orbital-period subdwarf B (sdB) stars with main-sequence companions. Their orbital periods are far beyond that expected from stable Roche Lobe overflow (RLOF), and then challenge this scenario to form these systems. In this contribution, we show a unique sdB mass – orbital period relation for sdB binaries produced in this way, given the progenitors of the sdB stars have initial masses below the helium flash mass. The observed orbital-period distribution of long-period sdB binaries can be well explained based on this relation. The mass – orbital period relation can be tested observationally if the mass of the sdB star can be determined precisely, e.g. from asteroseismology. Finally, we revised the orbital period distribution of sdB binaries produced by the first stable RLOF channel for the best fitting model of Han et al. (2003), showing a peak around 830 d.

语种英语
学科领域天文学 ; 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2015-03-24
WOS记录号WOS:000398425600027
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]Subdwarf-b-stars ; X-ray Binaries ; Stellar Evolution ; Neutron-star ; Systems ; Opacities ; Pulsars ; Dwarfs ; Origin
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/114a53/9660
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Chen XF(陈雪飞)
作者单位1.Yunnan Observatories, Chinese Academy of Sciences, Kunming, 650011, China
2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming, 650011, China
3.Centrum voor Plasma-Astrofysica, Katholieke University Leuven, Celestijnenlaan 200B, B-3001 Leuven, Belgium
4.University of Oxford, Department of Astrophysics, Keble Road, Oxford OX1 3RH, UK
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Chen XF,Han ZW,Deca, J.,et al. The sdB Mass - Orbital Period Relation for Long-Orbital-Period SdB+MS Binaries[C]//VanGrootel, V; Green, EM; Fontaine, G; Charpinet, S. 390 ASHTON AVE, SAN FRANCISCO, CA 94112 USA:ASTRONOMICAL SOC PACIFIC,2014:205-212.
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