THE LATE K-TYPE BINARY V1104 HER NEAR THE SHORT-PERIOD END OF CONTACT BINARIES | |
Liu NP(刘念平)1,2,3; Qian SB(钱声帮)1,2,3; Soonthornthum, B4; Zhu LY(朱俐颖)1,2,3; Liao WP(廖文萍)1,2; Zhao EG(赵二刚)1,2; Zhou X(周肖)1,2 | |
发表期刊 | ASTRONOMICAL JOURNAL |
2015-04 | |
卷号 | 149期号:4 |
DOI | 10.1088/0004-6256/149/4/148 |
产权排序 | 第1完成单位 |
收录类别 | SCI |
关键词 | Binaries: Close Binaries: Eclipsing Stars: Evolution Stars: Individual (V1104 Her) |
摘要 | V1104 Her is a newly discovered periodic variable with EW type variability. With an orbital period that is extremely short for a contact binary, it was found to have almost the latest K spectral type. To study its properties and nature, two new sets of multi-color light curves were analyzed with the Wilson-Devinney code. Photometric solutions reveal that the system is a W-type shallow contact binary with a mass ratio of 1/q=M-1/M-2=0.63. +/- 0.01 and a degree of contact of about f=15% +/- 2%. The real parameter uncertainties may be from three to five times larger, depending on the required confidence. Combining the newly determined times of minimum light, some of which were reprocessed from initial data, in conjunction with others published, the period variation is investigated in detail. Different methods of curve fitting were used, based on a weighted least-squares method. Finally, the orbital period of V1104 Her is found to be undergoing a long-term decrease at a rate of dP/dt = -2.9(+/- 0.5) x 10(-8) days . yr(-1), as well as double cyclic oscillations with a period ratio (T-1/T-2) very close to 9:2. The light-travel time effect was found to be the best explanation for the cyclic variations. This indicates that the object is a possible quadruple system, which further implies that multiplicity may be a common phenomenon among close binaries. |
资助项目 | Chinese Natural Science Foundation[11133007] ; Chinese Natural Science Foundation[11325315] ; Science Foundation of Yunnan Province[2012HC011] ; Strategic Priority Research Program "The Emergence of Cosmological Structures" of the Chinese Academy of Sciences[XDB09010202] |
项目资助者 | Chinese Natural Science Foundation[11133007, 11325315] ; 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 |
学科领域 | 天文学 ; 恒星与银河系 ; 恒星天文学 ; 恒星形成与演化 |
学科门类 | 理学 ; 理学::天文学 |
文章类型 | Article |
出版者 | IOP PUBLISHING LTD |
出版地 | TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND |
ISSN | 0004-6256 |
URL | 查看原文 |
归档日期 | 2015-09-15 |
WOS记录号 | WOS:000352336800032 |
WOS研究方向 | Astronomy & Astrophysics |
WOS类目 | Astronomy & Astrophysics |
关键词[WOS] | RW-COMAE BERENICES ; LIMB-DARKENING COEFFICIENTS ; LIGHT-CURVE ANALYSIS ; SKY AUTOMATED SURVEY ; ECLIPSING BINARIES ; QUADRUPLE SYSTEM ; RADIAL-VELOCITY ; CLOSE BINARIES ; STAR LIGHT ; ADDITIONAL COMPONENTS |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://ir.ynao.ac.cn/handle/114a53/5920 |
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 NP(刘念平) |
作者单位 | 1.Yunnan Observatories, Chinese Academy of Sciences, P.O. Box 110, Kunming 650011, China 2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, 650011 Kunming, China 3.University of Chinese Academy of Sciences, Beijing 100049, China 4.National Astronomical Research Institute of Thailand, 191 Siriphanich Bldg., Huay Kaew Road, Chiang Mai 50200, Bangkok, Thailand |
第一作者单位 | 中国科学院云南天文台 |
通讯作者单位 | 中国科学院云南天文台 |
推荐引用方式 GB/T 7714 | Liu NP,Qian SB,Soonthornthum, B,et al. THE LATE K-TYPE BINARY V1104 HER NEAR THE SHORT-PERIOD END OF CONTACT BINARIES[J]. ASTRONOMICAL JOURNAL,2015,149(4). |
APA | Liu NP.,Qian SB.,Soonthornthum, B.,Zhu LY.,Liao WP.,...&Zhou X.(2015).THE LATE K-TYPE BINARY V1104 HER NEAR THE SHORT-PERIOD END OF CONTACT BINARIES.ASTRONOMICAL JOURNAL,149(4). |
MLA | Liu NP,et al."THE LATE K-TYPE BINARY V1104 HER NEAR THE SHORT-PERIOD END OF CONTACT BINARIES".ASTRONOMICAL JOURNAL 149.4(2015). |
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THE LATE K-TYPE BINA(1022KB) | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | 浏览 请求全文 |
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