First four-color photometric investigation of extreme mass-ratio contact binary AS coronae borealis
文献类型：期刊论文
| 作者 | 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
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| 刊名 | NEW ASTRONOMY
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| 出版日期 | 2017-02-01 |
| 卷号 | 51页码:1-6 |
| ISSN号 | 1384-1076 |
| 关键词 | Stars: Binaries: close Stars: binaries: eclipsing Stars: individuals (AS coronae borealis) Stars: evolution |
| 通讯作者 | Liu, L |
| 产权排序 | 第一完成单位 |
| 英文摘要 | 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. |
| 学科主题 | Astronomy & Astrophysics |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | 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 |
| 收录类别 | SCI |
| 原文出处 | http://www.sciencedirect.com/science/article/pii/S1384107616300586 |
| 语种 | 英语 |
| WOS记录号 | WOS:000385595000001 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/9746]  |
| 专题 | 云南天文台_双星与变星研究组 云南天文台_中国科学院天体结构与演化重点实验室 |
| 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 |
| 推荐引用方式 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 NP.(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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来源：云南天文台
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