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Extremely Low Mass-ratio Semi-detached Binaries: KIC 2719436 and KIC 4245897
Zhang J(张嘉)1,2; Qian SB(钱声帮)1,2; Lyu, Bing3
发表期刊PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC
2020-11-01
卷号132期号:1017页码:11
DOI10.1088/1538-3873/abacd4
产权排序第1完成单位
收录类别SCI
关键词Eclipsing binary stars
摘要

We present two semi-detached binaries with extremely low mass-ratio (<0.1). The total eclipse feature on the light curves greatly improves the reliability of the binary light analysis results. Combining the photometric and spectral data, both the relative and the absolute parameters were obtained based on two methods. The masses and radii areM(1) = 1.21 0.45M,M-2 = 0.116 0.044M,R-1 = 1.89 0.25R, andR(2) = 0.76 0.1Rfor KIC 2719436, andM(1) = 1.58 0.49M,M-2 = 0.153 0.051M,R-1 = 1.9 0.28R, andR(2) = 5.14 0.79Rfor KIC 4245897. The binaries with extremely low mass-ratios provide a laboratory to study the binary outcomes as well as the extremely low-mass stars with complete physical properties. KIC 2719436 is an abnormal semi-detached binary system for its primary radius is much larger than that of the evolved secondary star who fills its own Roche Lobe. Excessive mass transfer leads to this situation on account of the effective angular momentum loss probably by the magnetic braking. KIC 2719436 is possible the closest target to the end as a single star that predicted by the TRO theory.

资助项目National Development and Reform Commission ; NASA Science Mission directorate ; Open Project Program of the Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences ; Chinese Natural Science Foundation[11703082] ; Chinese Natural Science Foundation[11933008] ; Chinese Natural Science Foundation[11703080] ; Yunnan Natural Science Foundation[2018FB006]
项目资助者National Development and Reform Commission ; NASA Science Mission directorate ; Open Project Program of the Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences ; Chinese Natural Science Foundation[11703082, 11933008, 11703080] ; Yunnan Natural Science Foundation[2018FB006]
语种英语
学科领域天文学 ; 恒星与银河系 ; 恒星形成与演化
学科门类理学 ; 理学::天文学
文章类型Article
出版者IOP PUBLISHING LTD
出版地TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
ISSN0004-6280
URL查看原文
WOS记录号WOS:000575331800001
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]PARSEC EVOLUTIONARY TRACKS ; STELLAR EVOLUTION ; CONTACT BINARIES ; PARAMETERS ; STARS ; LIGHT ; CATALOG ; MODELS
引用统计
被引频次:5[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/114a53/23803
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Zhang J(张嘉)
作者单位1.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, People's Republic of China
2.Key Laboratory of the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650216, People's Republic of China
3.School of Physics and Electronic Science, Guizhou Normal University, Guiyang 550001, People's Republic of China
第一作者单位中国科学院云南天文台
通讯作者单位中国科学院云南天文台
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Zhang J,Qian SB,Lyu, Bing. Extremely Low Mass-ratio Semi-detached Binaries: KIC 2719436 and KIC 4245897[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC,2020,132(1017):11.
APA Zhang J,Qian SB,&Lyu, Bing.(2020).Extremely Low Mass-ratio Semi-detached Binaries: KIC 2719436 and KIC 4245897.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC,132(1017),11.
MLA Zhang J,et al."Extremely Low Mass-ratio Semi-detached Binaries: KIC 2719436 and KIC 4245897".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC 132.1017(2020):11.
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