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题名:
Two twin binaries with nearly identical components: KIC 4826439 and KIC 6045264
作者: Zhang J(张嘉)1,2; Qian SB(钱声帮)1,2; Wang, SM3; Wu, Y4; Jiang, LQ5
刊名: PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
出版日期: 2017-06-01
卷号: 69, 期号:3, 页码:1-11
DOI: 10.1093/pasj/psx023
学科分类: 天文学
产权排序: 第1完成单位
收录类别: SCI
通讯作者: Jiang, LQ, Email: jianglinqiao11@163.com
关键词: binaries: eclipsing ; stars: evolution ; stars: fundamental parameters ; techniques: photometric
英文摘要: Two twin binaries, KIC 4826439 and KIC 6045264, with very similar component stars were found photometrically based on Kepler eclipsing binary light curves. The absolute parameters of the massive components are 1.156(0.03) M-circle dot, 1.881(0.02) R-circle dot, 6065 K for KIC 4826439, and 0.874(0.3) M-circle dot, 1.206(0.02) R-circle dot, 6169(30) K for KIC 6045264. The differences between the components are less than two percent for all the parameters. A very low proportion of twin binaries (2/1592 approximate to 0.13%) was found, which does not support the previous findings of excesses of twins on binary mass ratio distribution, but supports a deficiently low proportion of twins. A new method is used to work out the absolute parameters of the two twins without the radial velocities. This method requires the solution of the light curves, the spectra, and the evolutionary isochrones covering the complete stellar parameter space, simultaneously. We also studied their evolution tracks: KIC 4826439 will experience an unstable mass transfer stage followed by an unclear ending, and KIC 6045264 will become a single star via an over-contact phase. It seems highly unlikely that the two twin binaries will produce twin degenerate binaries, although they have quite similar components.
项目资助者: NASA(NAS5-26555) ; NASA Office of Space Science(NNX09AF08G) ; NASA Science Mission directorate ; West Light Foundation of The Chinese Academy of Sciences ; Yunnan Natural Science Foundation(Y5XB071001) ; Guangdong Provincial Engineering Technology Research Center for Data Science ; Sichuan University of Science and Engineering(2015RC42) ; Chinese Natural Science Foundation(11133007, 11325315, 11403056, 11573061, 11390374, 11373063, U1631108) ; Key Research Program of the Chinese Academy of Sciences(KGZD-EW-603) ; Science Foundation of Yunnan Province(2012HC011) ; Strategic Priority Research Program "The Emergence of Cosmological Structures" of the Chinese Academy of Sciences(XDB09010202)
语种: 英语
原文出处: 查看原文
ISSN号: 0004-6264
文章类型: Article
归档日期: 2017-11-02
WOS标题词: Science & Technology ; Physical Sciences
研究领域[WOS]: Astronomy & Astrophysics
类目[WOS]: Astronomy & Astrophysics
关键词[WOS]: MASSIVE PROTOSTELLAR CORES ; PARSEC EVOLUTIONARY TRACKS ; STELLAR EVOLUTION ; SPECTROSCOPIC BINARIES ; VELOCITY CURVES ; KEPLER FIELD ; LIGHT CURVES ; STAR LIGHT ; SYSTEMS ; FRAGMENTATION
WOS记录号: WOS:000430860300001
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ynao.ac.cn/handle/114a53/11906
Appears in Collections:双星与变星研究组_期刊论文
中国科学院天体结构与演化重点实验室_期刊论文

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作者单位: 1.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, China
2.Key Laboratory of the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650216, China
3.School of Mathematics and Physics, Handan University, Handan 056005, China
4.Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China
5.School of Physics and Electronic Engineering, Sichuan University of Science & Engineering, Zigong 643000, China

Recommended Citation:
Zhang J,Qian SB,Wang, SM,et al. Two twin binaries with nearly identical components: KIC 4826439 and KIC 6045264[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,2017,69(3):1-11.
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