Orbital period investigation of some short-period sdB-type eclipsing binaries

doi:10.1007/s10509-010-0290-5

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	Orbital period investigation of some short-period sdB-type eclipsing binaries
	Qian SB(钱声帮)1,2 ; Zhu LY(朱俐颖)1,2 ; Liu L(刘亮)1,2 ; Dai ZB(戴智斌)1,2 ; He JJ(何家佳)1,2 ; Liao WP(廖文萍)1,2 ; Zhao EG(赵二刚)1,2 ; Zola, S 3,4; Kuligowska, E 3; Winiarski, M 4; Qian, SB (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, POB 110, Kunming 650011, Peoples R China.
发表期刊	ASTROPHYSICS AND SPACE SCIENCE
	2010-10
卷号	329 期号:1-2 页码:113-117
DOI	10.1007/s10509-010-0290-5
产权排序	第1完成单位
收录类别	SCI
关键词	Stars: Binaries: Close Stars: Binaries: Eclipsing Stars: Subdwarfs Stars: Mass-loss Stars: Low-mass Brown Dwarfs
摘要	To understand the properties of orbital period changes of four short period sdB-type eclipsing binaries, HW Vir, HS 0705 + 6700, HS 2231 + 2441, and NSVS 14256825, we have monitored them photometrically since 2006. Apart from HW Vir, it is found that the O-C diagrams of HS 0705 + 6700 and HS 2231 + 2441 can also be described by a cyclic variation superimposed on a downward parabolic curve, indicating a long-term period decrease in the two systems. Therefore, of the four binary systems, long-term period variations have been detected for three ones that can be explained by magnetic braking of the fully convective component stars. This may drive these systems to evolution into normal cataclysmic variables. As for the cyclic period variations observed in the four systems, the light-travel time effect via the presence of a tertiary component is the most possible mechanism to interpret the periodic change, which reveals the presence of extremely low-mass objects (e.g., brown dwarf stars and huge planets) in this kind of binaries.
项目资助者	Chinese Natural Science Foundation [10973037, 10903026, 10778718] ; National Key Fundamental Research Project [2007CB815406] ; Yunnan Natural Science Foundation [2008CD157] ; Special Foundation of President and West Light Foundation of the Chinese Academy of Sciences
语种	英语
学科领域	Astronomy & Astrophysics
文章类型	Article
ISSN	0004-640X
URL	查看原文
归档日期	2010-10-14
WOS记录号	WOS:000282823200019
WOS研究方向	Astronomy & Astrophysics
WOS类目	Astronomy & Astrophysics
关键词[WOS]	HW VIR-TYPE ; CATACLYSMIC VARIABLES ; STELLAR EVOLUTION ; MAGNETIC BRAKING ; STARS ; COMPANION
引用统计	被引频次：22[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ynao.ac.cn/handle/114a53/5836
专题	双星与变星研究组中国科学院天体结构与演化重点实验室
通讯作者	Qian, SB (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, POB 110, Kunming 650011, Peoples R China.
作者单位	1.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, P.O. Box 110, 650011, Kunming, P.R. China 2.Laboratory for the Structure and Evolution of Celestial Bodies, Chinese Academy of Sciences, P.O. Box 110, 650011, Kunming, P.R. China 3.Astronomical Observatory, Jagiellonian University, ul. Orla 171, 30-244, Krakow, Poland 4.Mt. Suhora Observatory, Cracow Pedagogical University, ul. Podchorazych 2, 30-084, Krakow, Poland
第一作者单位	中国科学院云南天文台
推荐引用方式 GB/T 7714	Qian SB,Zhu LY,Liu L,et al. Orbital period investigation of some short-period sdB-type eclipsing binaries[J]. ASTROPHYSICS AND SPACE SCIENCE,2010,329(1-2):113-117.
APA	Qian SB.,Zhu LY.,Liu L.,Dai ZB.,He JJ.,...&Qian, SB .(2010).Orbital period investigation of some short-period sdB-type eclipsing binaries.ASTROPHYSICS AND SPACE SCIENCE,329(1-2),113-117.
MLA	Qian SB,et al."Orbital period investigation of some short-period sdB-type eclipsing binaries".ASTROPHYSICS AND SPACE SCIENCE 329.1-2(2010):113-117.

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