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First four-color photometric investigation of extreme mass-ratio contact binary AS coronae borealis
Liu L(刘亮)1,2,3; Qian SB(钱声帮)1,2,3; Zhu LY(朱俐颖)1,2,3; Liao WP(廖文萍)1,2; He JJ(何家佳)1,2; Liu NP(刘念平)1,2; Liu, L
发表期刊NEW ASTRONOMY
2017-02-01
卷号51页码:1-6
DOI10.1016/j.newast.2016.08.003
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: Individuals (As Coronae Borealis) Stars: Evolution
摘要The first high-precision BVRI light curves of the eclipsing binary AS CrB were presented and were analyzed by the 2015 version of the W-D code. It is found that AS CrB is an extreme mass-ratio, deep contact binary with a fill-out factor of f = 59.6 +/- 2.5% and a mass ratio of q = 0.172 +/- 0.008. Based on the photometric solution and the Dartmouth isochrones model, the masses, radii, and luminosities of the components are estimated as follows: M-1 = 1.25 +/- 0.15M(circle dot), M-2 = 0.21 +/- 0.06M(circle dot), R-1 = 1.40 +/- 0.07R(circle dot), R-2 = 0.67 +/- 0.04R(circle dot), L-1 = 3.2 +/- 0.2L(circle dot), and L-2 = 0.72 +/- 0.04L(circle dot), with an estimated distance 459 +/- 42 pc. These uncertainties mainly come from the errors of the color used to estimate the temperature of the primary star. By investigating all of the available times of light minima, it is found that the Observed-Calculated [(O - C)] curve shows a long-term period increase, with a rate of dP/dt = +(3.46 +/- 0.01) x 10(-7) day/year. As an extreme mass-ratio contact binary, AS CrB may merge into a single star, such as an FK Com-type star or a blue straggler, because of the orbital instability. (C) 2016 Elsevier B.V. All rights reserved.
项目资助者National Natural Science Foundation of China (NSFC)(11133007, 11325315, 11403095) ; Talent Project of Yunnan Province(2015HB098) ; Yunnan Natural Science Foundation(2016FB004, 2014FB187) ; Youth Innovation Promotion Association CAS
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN1384-1076
URL查看原文
归档日期2017-01-06
WOS记录号WOS:000385595000001
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]HIGH FILL-OUT ; OVERCONTACT BINARY ; ECLIPSING BINARY ; VELOCITY CURVES ; LIGHT CURVES ; STAR LIGHT ; CU-TAURI ; XY-BOO ; DEEP ; SYSTEMS
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被引频次:1[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/114a53/9746
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Liu, L
作者单位1.Yunnan Observatories, Chinese Academy of Sciences (CAS), P.O. Box 110, 650216 Kunming, P.R. China
2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, 650216 Kunming, P.R. China
3.University of the Chinese Academy of Sciences, Yuquan Road 19#, Sijingshang Block, 100049 Beijing, P.R. China
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GB/T 7714
Liu L,Qian SB,Zhu LY,et al. First four-color photometric investigation of extreme mass-ratio contact binary AS coronae borealis[J]. NEW ASTRONOMY,2017,51:1-6.
APA Liu L.,Qian SB.,Zhu LY.,Liao WP.,He JJ.,...&Liu, L.(2017).First four-color photometric investigation of extreme mass-ratio contact binary AS coronae borealis.NEW ASTRONOMY,51,1-6.
MLA Liu L,et al."First four-color photometric investigation of extreme mass-ratio contact binary AS coronae borealis".NEW ASTRONOMY 51(2017):1-6.
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