The Photometric Investigation of V921 Her Using the Lunar-Based Ultraviolet Telescope of Chang'e-3 Mission

	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
刊名	ADVANCES IN ASTRONOMY
	2016
ISSN号	1687-7969
通讯作者	Zhou, X
产权排序	第一完成单位
英文摘要	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.
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]	VELOCITY CURVE ANALYSIS ; URSAE MAJORIS SYSTEMS ; CONTACT BINARY STARS ; ADDITIONAL COMPONENTS ; LIGHT CURVES ; CYGNI
收录类别	SCI
原文出处	http://www.hindawi.com/journals/aa/2016/7468976/
语种	英语
WOS记录号	WOS:000378751400001
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/9617]
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, 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
推荐引用方式 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).