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The Photometric Investigation of V921 Her Using the Lunar-Based Ultraviolet Telescope of Chang'e-3 Mission
Zhou X(周肖)1,2,3; Qian SB(钱声帮)1,2,3; Zhang J(张嘉)1,2; Li LJ(李临甲)1,2; Wang QS(王琪善)1,2,3
Source PublicationADVANCES IN ASTRONOMY
2016
DOI10.1155/2016/7468976
Contribution Rank第1完成单位
Indexed BySCI
Abstract

The light curve of V921 Her in ultraviolet band observed by the Lunar-based Ultraviolet Telescope (LUT) is analyzed by the Wilson-Devinney code. Our solutions conclude that V921 Her is an early type marginal contact binary system with an additional close-in component. The binary system is under poor thermal contact with a temperature difference of nearly 700 K between the two components. The close-in component contributes about 19% of the total luminosity in the triple system. Combining the radial velocity study together with our photometric solutions, the mass of the primary star and secondary one is calculated to be M-1 = 1.784 (+/- 0.055)M-circle dot, M-2 = 0.403 (+/- 0.012)M-circle dot. The evolutionary scenario of V921 Her is discussed. All times of light minimum of V921 Her available in the bibliography are taken into account and the O-C curve is analyzed for the first time. The most probable fitting results are discussed in the paper, which also confirm the existence of a third component (P-3 = 10.2 year) around the binary system. The period of V921 Her is also undergoing a continuously rapid increase at a rate of dP/dt = +2.79 x 10(-7) day.year(-1), which may be due to mass transfer from the less massive component to the more massive one.

Funding ProjectChinese Natural Science Foundation[11133007] ; Chinese Natural Science Foundation[11325315] ; Chinese Natural Science Foundation[11203066] ; Strategic Priority Research Program "The Emergence of Cosmological Structure" of Chinese Academy of Sciences[XDB09010202] ; Key Research Program of Chinese Academy of Sience[KGED-EW-603] ; Science Foundation of Yunnan Province[2012HC011]
Funding OrganizationChinese Natural Science Foundation[11133007, 11325315, 11203066] ; Strategic Priority Research Program "The Emergence of Cosmological Structure" of Chinese Academy of Sciences[XDB09010202] ; Key Research Program of Chinese Academy of Sience[KGED-EW-603] ; Science Foundation of Yunnan Province[2012HC011]
Language英语
Subject Area天文学 ; 天体物理学 ; 实测天体物理学 ; 恒星与银河系 ; 恒星天文学
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherHINDAWI LTD
Publication PlaceADAM HOUSE, 3RD FLR, 1 FITZROY SQ, LONDON, W1T 5HF, ENGLAND
ISSN1687-7969
URL查看原文
Archive Date2017-05-18
WOS IDWOS:000378751400001
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordVELOCITY CURVE ANALYSIS ; URSAE MAJORIS SYSTEMS ; CONTACT BINARY STARS ; ADDITIONAL COMPONENTS ; LIGHT CURVES ; CYGNI
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/9617
Collection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
Corresponding AuthorZhou X(周肖)
Affiliation1.Yunnan Observatories, Chinese Academy of Sciences (CAS), P.O. Box 110, Kunming 650216, China
2.Key Laboratory of the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, P.O. Box 110, Kunming 650216, China
3.University of Chinese Academy of Sciences, Yuquan Road No. 19, Sijingshang Block, Beijing 100049, China
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Corresponding Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Zhou X,Qian SB,Zhang J,et al. The Photometric Investigation of V921 Her Using the Lunar-Based Ultraviolet Telescope of Chang'e-3 Mission[J]. ADVANCES IN ASTRONOMY,2016.
APA Zhou X,Qian SB,Zhang J,Li LJ,&Wang QS.(2016).The Photometric Investigation of V921 Her Using the Lunar-Based Ultraviolet Telescope of Chang'e-3 Mission.ADVANCES IN ASTRONOMY.
MLA Zhou X,et al."The Photometric Investigation of V921 Her Using the Lunar-Based Ultraviolet Telescope of Chang'e-3 Mission".ADVANCES IN ASTRONOMY (2016).
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