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Two twin binaries with nearly identical components: KIC 4826439 and KIC 6045264
Zhang J(张嘉)1,2; Qian SB(钱声帮)1,2; Wang, SM3; Wu, Y4; Jiang, LQ5
Source PublicationPUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
2017-06-01
Volume69Issue:3Pages:1-11
DOI10.1093/pasj/psx023
Contribution Rank第1完成单位
Indexed BySCI
KeywordBinaries: Eclipsing Stars: Evolution Stars: Fundamental Parameters Techniques: Photometric
Abstract

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.

Funding ProjectNASA[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] ; Chinese Natural Science Foundation[11325315] ; Chinese Natural Science Foundation[11403056] ; Chinese Natural Science Foundation[11573061] ; Chinese Natural Science Foundation[11390374] ; Chinese Natural Science Foundation[11373063] ; Chinese Natural Science Foundation[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]
Funding OrganizationNASA[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]
Language英语
Subject Area天文学 ; 恒星与银河系 ; 恒星物理学
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherOXFORD UNIV PRESS
Publication PlaceGREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
ISSN0004-6264
URL查看原文
Archive Date2017-11-02
WOS IDWOS:000430860300001
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordMASSIVE PROTOSTELLAR CORES ; PARSEC EVOLUTIONARY TRACKS ; STELLAR EVOLUTION ; SPECTROSCOPIC BINARIES ; VELOCITY CURVES ; KEPLER FIELD ; LIGHT CURVES ; STAR LIGHT ; SYSTEMS ; FRAGMENTATION
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/11906
Collection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
Corresponding AuthorJiang, LQ
Affiliation1.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
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
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.
APA Zhang J,Qian SB,Wang, SM,Wu, Y,&Jiang, LQ.(2017).Two twin binaries with nearly identical components: KIC 4826439 and KIC 6045264.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,69(3),1-11.
MLA Zhang J,et al."Two twin binaries with nearly identical components: KIC 4826439 and KIC 6045264".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN 69.3(2017):1-11.
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