The short-period limit of contact binaries

doi:10.1111/j.1365-2966.2011.20323.x

YNAO OpenIR > 大样本恒星演化研究组

	The short-period limit of contact binaries
	Jiang DK(姜登凯)1,2 ; Han ZW(韩占文)1,2 ; Ge HW(葛宏伟)1,2 ; Yang LH(杨丽恒)1 ; Li LF(李立芳)1,2 ; Jiang, DK (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, POB 110, Kunming 650011, Yunnan Province, Peoples R China.
发表期刊	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2012-04
卷号	421 期号:4 页码:2769-2773
DOI	10.1111/j.1365-2966.2011.20323.x
产权排序	第1完成单位
收录类别	SCI
关键词	Instabilities Binaries: Close Binaries: Eclipsing Stars: Evolution Stars: Formation
摘要	The stability of mass transfer is important in the formation of contact binaries from detached binaries when the primaries of the initially detached binaries fill their Roche lobes. Using Eggletons stellar evolution code, we investigate the formation and the short-period limit of contact binaries by considering the effect of the instability of mass transfer. It is found that with decreasing initial primary mass from 0.89 to 0.63 M?, the range of the initial mass ratio decreases for detached binaries that experience stable mass transfer and evolve into contact. If the initial primary mass is less than 0.63 M?, detached binaries would experience dynamically unstable mass transfer when the primaries of detached binaries fill their Roche lobes. These systems would evolve into a common envelope situation and probably then to a complete merger of two components on a quite short time-scale. This results in a low mass limit at about 0.63 M? for the primary mass of contact binaries, which might be the main reason why the period distribution of contact binaries has a short limit of about 0.22 d. By comparing the theoretical period distribution of contact binaries with the observational data, it is found that the observed contact binaries are above the low mass limit for the primary mass of contact binaries and no observed contact binaries are below this limit. This suggests that the short-period limit of contact binaries can be explained by the instability of the mass transfer that occurs when the primaries of the initially detached binaries fill their Roche lobes.
项目资助者	Chinese Natural Science Foundation [10773026, 10821061, 11073049, 2007CB815406, 11033008, 11103073] ; Foundation of Chinese Academy of Sciences [KJCX2-YW-T24]
语种	英语
学科领域	Astronomy & Astrophysics
文章类型	Article
ISSN	0035-8711
URL	查看原文
归档日期	2012-08-13
WOS记录号	WOS:000302620700004
WOS研究方向	Astronomy & Astrophysics
WOS类目	Astronomy & Astrophysics
关键词[WOS]	SKY AUTOMATED SURVEY ; ADIABATIC MASS-LOSS ; ECLIPSING BINARY ; STELLAR EVOLUTION ; ABSOLUTE DIMENSIONS ; YY GEMINORUM ; STARS ; SYSTEMS ; COMPONENTS ; MODELS
引用统计	被引频次：62[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/114a53/4539
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	Jiang, DK (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, POB 110, Kunming 650011, Yunnan Province, Peoples R China.
作者单位	1.National Astronomical Observatories, Yunnan Observatory, Chinese Academy of Sciences, PO Box 110, Kunming, Yunnan Province 650011, China 2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, PO Box 110, Kunming, Yunnan Province 650011, China
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	Jiang DK,Han ZW,Ge HW,et al. The short-period limit of contact binaries[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2012,421(4):2769-2773.
APA	Jiang DK,Han ZW,Ge HW,Yang LH,Li LF,&Jiang, DK .(2012).The short-period limit of contact binaries.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,421(4),2769-2773.
MLA	Jiang DK,et al."The short-period limit of contact binaries".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 421.4(2012):2769-2773.

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