The sdB Mass - Orbital Period Relation for Long-Orbital-Period SdB+MS Binaries

	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
	2014-04
会议名称	6th Meeting on Hot Subdwarf Stars and Related Objects
会议地点	Steward Observatory, University of Arizona, Tucson, Arizona, USA
卷号	481
页码	221-228
英文摘要	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.
收录类别	其他
产权排序	第一完成单位
会议网址	http://aspbooks.org/custom/publications/paper/481-0205.html
会议录	ASP Conference Series - 6th Meeting on Hot Subdwarf Stars and Related Objects
会议录出版者	Astronomical Society of the Pacific
会议录出版地	San Francisco
语种	英语
ISBN号	978-1-58381-846-6
内容类型	会议论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/9660]
专题	云南天文台_大样本恒星演化研究组云南天文台_中国科学院天体结构与演化重点实验室
作者单位	1.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
推荐引用方式 GB/T 7714	Chen XF,Han ZW,Deca, J.,et al. The sdB Mass - Orbital Period Relation for Long-Orbital-Period SdB+MS Binaries[C]. 见:6th Meeting on Hot Subdwarf Stars and Related Objects. Steward Observatory, University of Arizona, Tucson, Arizona, USA.http://aspbooks.org/custom/publications/paper/481-0205.html.