New results on the two low-mass-ratio overcontact binaries V1309 Herculis and AS Coronae Borealis | |
Matekov, Azizbek3,4,5; Meng FB(孟芳斌)2,4,5; Qian SB(钱声帮)2,4,5; Asfandiyarov, Ildar3; Li LJ(李临甲)2,4,5; Ehgamberdiev, Shuhrat1,3; Zhu LY(朱俐颖)2,4,5 | |
刊名 | PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN |
2023 | |
关键词 | binaries: close binaries: eclipsing stars: individual (V1309 Herculis, AS Coronae Borealis) |
ISSN号 | 0004-6264 |
DOI | 10.1093/pasj/psad030 |
产权排序 | 第1完成单位 |
文献子类 | Article; Early Access |
英文摘要 | We present new multi-color light curves of V1309 Her and AS CrB, which were observed by the 60 cm telescope located at the Maidanak Astronomical Observatory. Combined with the Large-Sky-AreaMulti-Object Fiber Spectroscopic Telescope atmospheric parameters, we analyzed our BVRCIC light curves for both systems by employing the Wilson-Devinney program. Our results show that both systems are low-mass-ratio overcontact binaries (V1309 Her: q = 0.213, AS CrB: q = 0.16). AS CrB has a high fill-out factor, while that of V1309 Her is moderate. By adding our new times of minimum light, we found the periodic oscillations in their O - C curves, which could be explained by the light travel-time effect of the third bodies. The third lights detected during the light curve analysis support the existence of the third bodies in V1309 Her and AS CrB. Third bodies usually play an important role for the origin and evolution of the central pair by removing their angular momentum. With the angular momentum loss, a moderate-fill-out overcontact binary like V1309 Her will evolve to a deep one like AS CrB. AS CrB lies at the late evolutionary stage of contact binaries. A long-term period increase at a rate of dP/dt = 5.22(+/- 0.28) x 10(-7) dyr(-1) was detected in our O - C diagram analysis. When its orbital angular momentum is less than three times the total spin angular momentum, a system may finally evolve into a rapid-rotating single star. |
学科主题 | 天文学 ; 恒星与银河系 ; 恒星形成与演化 |
URL标识 | 查看原文 |
出版地 | GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND |
资助项目 | International Cooperation Projects of the National Key RD Program[2022YFE0127300] ; National Natural Science Foundation of China[11933008] ; National Natural Science Foundation of China[11922306] |
WOS关键词 | CONTACT BINARIES ; ADDITIONAL COMPONENTS ; PERIOD CHANGES ; LIGHT CURVES ; SYSTEMS ; SEARCH ; STARS ; DEEP |
WOS研究方向 | Astronomy & Astrophysics |
语种 | 英语 |
出版者 | OXFORD UNIV PRESS |
WOS记录号 | WOS:000983199000001 |
资助机构 | International Cooperation Projects of the National Key RD Program[2022YFE0127300] ; National Natural Science Foundation of China[11933008, 11922306] |
内容类型 | 期刊论文 |
版本 | 出版稿 |
源URL | [http://ir.ynao.ac.cn/handle/114a53/26060] |
专题 | 云南天文台_双星与变星研究组 |
通讯作者 | Meng FB(孟芳斌) |
作者单位 | 1.National University of Uzbekistan, 4 University str, Tashkent, 100174, Uzbekistan 2.Key Laboratory of the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming, 650216, China; 3.Ulugh Beg Astronomical Institute, Uzbekistan Academy of Sciences, 33 Astronomicheskaya str., Tashkent, 100052, Uzbekistan; 4.University of Chinese Academy of Sciences, No.1 Yanqihu East Rd, Huairou District, Beijing, PR China, 101408; 5.Yunnan Observatories, Chinese Academy of Sciences (CAS), 650216, Kunming, China; |
推荐引用方式 GB/T 7714 | Matekov, Azizbek,Meng FB,Qian SB,et al. New results on the two low-mass-ratio overcontact binaries V1309 Herculis and AS Coronae Borealis[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,2023. |
APA | Matekov, Azizbek.,Meng FB.,Qian SB.,Asfandiyarov, Ildar.,Li LJ.,...&Zhu LY.(2023).New results on the two low-mass-ratio overcontact binaries V1309 Herculis and AS Coronae Borealis.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN. |
MLA | Matekov, Azizbek,et al."New results on the two low-mass-ratio overcontact binaries V1309 Herculis and AS Coronae Borealis".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN (2023). |
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