A COMPREHENSIVE PHOTOMETRIC STUDY OF THE CONTACT BINARY GN BOO WITH POSSIBLE MAGNETIC ACTIVITIES

	A COMPREHENSIVE PHOTOMETRIC STUDY OF THE CONTACT BINARY GN BOO WITH POSSIBLE MAGNETIC ACTIVITIES
	Wang JJ(王晶晶)1,2,3 ; Qian SB(钱声帮)1,2,3 ; Zhang, YP 4; Zhang J(张嘉)1,2,3 ; He JJ(何家佳)1,2,3 ; Zhao EG(赵二刚)1,2,3 ; Zhu LY(朱俐颖)1,2,3 ; Liao WP(廖文萍)1,2,3 ; Liu L(刘亮)1,2,3
刊名	ASTRONOMICAL JOURNAL
	2015-05
卷号	149 期号:5
关键词	binaries: close stars: activity stars: evolution stars: individual (GN Boo)
ISSN号	0004-6256
通讯作者	Wang, JJ (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, POB 110, Kunming 650216, Peoples R China.
产权排序	第一完成单位
英文摘要	Multi-color photometric data of GN Boo observed from 2010 to 2013 are presented. The intrinsic variations of the light curves are remarkable, and their phenomena are probable evidence of stronger magnetic activities on the surfaces of the components. Based on all CCD times of minimum light, a secular increase superimposed on a cyclic oscillation is found. The orbital period increases at a rate of dP/dt = + 1.74 x 10(-7) days yr(-1), which can be explained by mass transfer from the less massive component to the more massive one. The period and amplitude of the cyclic variation are P = 9.5632 yr and A = 0.0046 days, respectively, which correspond to the previous published results. Using the 2010 version of the W-D code, five sets of photometric solutions were derived from our new data. The results imply that the stellar spot, the degree of fill-out, and the temperature difference Delta T between the components of GN Boo are variable. It is inferred that the magnetic activities perhaps influence the outer radius of the component, causing the temperature of the component star and the level of contact to change.
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]	ECLIPSING BINARY ; LIGHT CURVES ; VELOCITY CURVES ; OPTICAL FLARES ; PERIOD CHANGES ; URSAE MAJORIS ; STAR LIGHT ; EVOLUTION ; COMPONENT ; SYSTEMS
收录类别	SCI
原文出处	http://iopscience.iop.org/article/10.1088/0004-6256/149/5/164/meta
语种	英语
WOS记录号	WOS:000354065200015
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/5919]
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.National Astronomical Observatories/Yunnan Observatories, Chinese Academy of Sciences, P.O. Box 110, 650216 Kunming, China 2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, 650216 Kunming, China 3.Graduate School of the Chinese Academy of Sciences, Yuquan Road 19, Shijingshan Block, 100049 Beijing, China 4.Department of Astronomy, Beijing Normal University, 100875 Beijing, China
推荐引用方式 GB/T 7714	Wang JJ,Qian SB,Zhang, YP,et al. A COMPREHENSIVE PHOTOMETRIC STUDY OF THE CONTACT BINARY GN BOO WITH POSSIBLE MAGNETIC ACTIVITIES[J]. ASTRONOMICAL JOURNAL,2015,149(5).
APA	Wang JJ.,Qian SB.,Zhang, YP.,Zhang J.,He JJ.,...&Liu L.(2015).A COMPREHENSIVE PHOTOMETRIC STUDY OF THE CONTACT BINARY GN BOO WITH POSSIBLE MAGNETIC ACTIVITIES.ASTRONOMICAL JOURNAL,149(5).
MLA	Wang JJ,et al."A COMPREHENSIVE PHOTOMETRIC STUDY OF THE CONTACT BINARY GN BOO WITH POSSIBLE MAGNETIC ACTIVITIES".ASTRONOMICAL JOURNAL 149.5(2015).