Mass transfer and loss of the massive semi-detached binary AI Crucis

doi:10.1088/1674-4527/10/5/004

YNAO OpenIR > 双星与变星研究组

	Mass transfer and loss of the massive semi-detached binary AI Crucis
	Zhao EG(赵二刚)1,2,3 ; Qian SB(钱声帮)1,2,3 ; Lajus, EF 4; von Essen, C 4; Zhu LY(朱俐颖)1,2,3 ; Zhao, EG (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, Kunming 650011, Peoples R China.
发表期刊	RESEARCH IN ASTRONOMY AND ASTROPHYSICS
	2010-05
卷号	10 期号:5 页码:438-444
DOI	10.1088/1674-4527/10/5/004
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: Individual (Ai Crucis) Stars: Early-type Stars: Evolution
摘要	AI Crucis is a short-period semi-detached massive close binary (P = 1.41771(d), Sp.=B 1.5) in the open cluster NGC 4103. It is a good astrophysical laboratory for investigating the formation and evolution of massive close binary stars via case A mass transfer. Orbital period variations of the system were analyzed based on one newly determined eclipse time and the others compiled from the literature. It is discovered that the orbital period of the binary is continuously increasing at a rate of dP/dt = +1.00(+/- 0.04) x 10(-7) d yr(-1). After the long-term increase is subtracted from the O - C diagram, weak evidence indicates the presence of a cyclic oscillation with a period of 30.1 yr, which may reveal a very cool stellar companion in the system. The long-term period increase can be explained by mass transfer from the less massive component to the more massive one. This is in agreement with the semidetached configuration of the binary, indicating that the system is undergoing a slow mass-transfer stage on the nuclear time scale of the secondary. However, it is found that the slow mass transfer is insufficient to cause the observed period increase, which suggests that the stellar wind from the hot component should contribute to the amount of period increase dP/dt = +0.54 x 10(-7) d yr-1 that corresponds to a mass loss rate of (M)over dot>(1) = 2.72 x 10(-7) M(circle dot) yr(-1). It is estimated that the hot component lost a total mass of 4.1 M(circle dot) during the slow mass-transfer stage and, thus, the evolution of the binary system should be changed greatly by the mass loss.
项目资助者	Chinese Academy of Sciences [08ZKY11001] ; Yunnan Natural Science Foundation [2005A0059M] ; National Natural Science Foundation Of China [10573032, 10433030] ; National Key Fundamental Research Project [2007CB815406]
语种	英语
学科领域	Astronomy & Astrophysics
文章类型	Article
ISSN	1674-4527
URL	查看原文
WOS记录号	WOS:000278093100004
WOS研究方向	Astronomy & Astrophysics
WOS类目	Astronomy & Astrophysics
关键词[WOS]	ORBITAL PERIOD MODULATION ; ECLIPSING BINARIES ; CLOSE BINARIES ; PHOTOMETRY ; EVOLUTION ; SYSTEM ; STARS ; PHASE
引用统计	被引频次：9[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/114a53/5841
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	Zhao, EG (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, Kunming 650011, Peoples R China.
作者单位	1.National Astronomical Observatories / Yunnan Observatory, 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.Graduate University of Chinese Academy of Sciences, Beijing 100049, China 4.Facultad de Ciencias Astronómicas y Geofisicas, Universidad Nacional de La Plata, 1900 La Plata, Buenos Aires, Argentina
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	Zhao EG,Qian SB,Lajus, EF,et al. Mass transfer and loss of the massive semi-detached binary AI Crucis[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2010,10(5):438-444.
APA	Zhao EG,Qian SB,Lajus, EF,von Essen, C,Zhu LY,&Zhao, EG .(2010).Mass transfer and loss of the massive semi-detached binary AI Crucis.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,10(5),438-444.
MLA	Zhao EG,et al."Mass transfer and loss of the massive semi-detached binary AI Crucis".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 10.5(2010):438-444.

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