Physical Properties of the Close-in Tertiary in the Southern Triple-lined System VZ Lib | |
Liao WP(廖文萍)1,2,3; Qian SB(钱声帮)1,2,3,4; Sarotsakulchai, T.1,2,3,4,5 | |
刊名 | ASTRONOMICAL JOURNAL |
2019-05-01 | |
卷号 | 157期号:5页码:8 |
关键词 | binaries (including multiple): close binaries: eclipsing stars: evolution stars: individual (VZ Lib) |
ISSN号 | 0004-6256 |
DOI | 10.3847/1538-3881/ab17d4 |
产权排序 | 第1完成单位 |
文献子类 | Article |
英文摘要 | VZ Lib is a southern triple-lined system. By analyzing all available times of light minima, orbital period changes are revisited in detail. We discovered that the observed-calculated (O - C) curve shows a long-term period decrease at a rate of dP/dt = -2.25 x 10(-7) days yr(-1), revealing a mass transfer from the more massive component to the less massive one. A cyclic variation covering more than three cycles was discovered, which was analyzed for the light-travel-time effect via the presence of the tertiary companion. The cyclic variation has a short period of 2.96 (+/- 0.04) yr and a small semiamplitude of 0.0039 (+/- 0.0004) days. The mass of the third body was determined to be M-3 sin i(3) = 0.52(+/- 0.07) M-circle dot and an orbital semimajor axis shorter than 1.93(+/- 0.31) au was obtained. Orbital properties of this close-in companion should provide valuable information on the formation of close binaries and stellar dynamical interaction. New complete BVRcIc light curves of VZ Lib were obtained and modeled with the Wilson-Devinney code. The light curves show a small but significant O'Connell effect that was not detectable in 1981 and 2007 but in 2004, so we derived a new photometric solution with assuming spot and a third light in the system. It is found that the light-curve subtype changed from A-type to W-type, which was possibly caused by a dark spot on the massive component. Our photometric solutions are in agreement with the spectroscopic results given by previous authors. |
学科主题 | 天文学 ; 恒星与银河系 ; 恒星物理学 ; 恒星形成与演化 |
URL标识 | 查看原文 |
出版地 | TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND |
资助项目 | National Natural Science Foundation of China[11873017] ; Science and Technology Talents and Platform Plan of Yunnan province[2018HB070] ; Yunnan Natural Science Foundation[2016FB004] |
WOS关键词 | RADIAL-VELOCITY ; BINARY STARS ; ADDITIONAL COMPONENTS ; CONTACT BINARIES ; QUADRUPLE SYSTEM ; PARAMETERS ; LIGHT ; SEARCH |
WOS研究方向 | Astronomy & Astrophysics |
语种 | 英语 |
出版者 | IOP PUBLISHING LTD |
WOS记录号 | WOS:000466896000001 |
资助机构 | National Natural Science Foundation of China[11873017] ; Science and Technology Talents and Platform Plan of Yunnan province[2018HB070] ; Yunnan Natural Science Foundation[2016FB004] |
内容类型 | 期刊论文 |
源URL | [http://ir.ynao.ac.cn/handle/114a53/20109] |
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 |
通讯作者 | Liao WP(廖文萍) |
作者单位 | 1.Yunnan Observatories, Chinese Academy of Sciences (CAS), 650216 Kunming, People's Republic of China 2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, 650216 Kunming, People's Republic of China 3.Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing 100012, People's Republic of China 4.University of the Chinese Academy of Sciences, Yuquan Road 19#, Shijingshan Block, 100049 Beijing, People's Republic of China 5.National Astronomical Research Institute of Thailand, 191 Siripanich Building, Chiang Mai 50200, Thailand |
推荐引用方式 GB/T 7714 | Liao WP,Qian SB,Sarotsakulchai, T.. Physical Properties of the Close-in Tertiary in the Southern Triple-lined System VZ Lib[J]. ASTRONOMICAL JOURNAL,2019,157(5):8. |
APA | Liao WP,Qian SB,&Sarotsakulchai, T..(2019).Physical Properties of the Close-in Tertiary in the Southern Triple-lined System VZ Lib.ASTRONOMICAL JOURNAL,157(5),8. |
MLA | Liao WP,et al."Physical Properties of the Close-in Tertiary in the Southern Triple-lined System VZ Lib".ASTRONOMICAL JOURNAL 157.5(2019):8. |
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