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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, YP4; 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; Wang, JJ (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, POB 110, Kunming 650216, Peoples R China.
发表期刊ASTRONOMICAL JOURNAL
2015-05
卷号149期号:5
DOI10.1088/0004-6256/149/5/164
产权排序第1完成单位
收录类别SCI
关键词Binaries: Close Stars: Activity Stars: Evolution Stars: Individual (Gn Boo)
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.
项目资助者Chinese Natural Science Foundation [11203066, 11325315] ; Science Foundation of Yunnan Province [2012HC011] ; Strategic Priority Research Program "The Emergence of Cosmological Structures" of the Chinese Academy of Sciences [XDB09010202] ; Key Laboratory Foundation of the Chinese Academy of Sciences
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0004-6256
URL查看原文
归档日期2015-05-28
WOS记录号WOS:000354065200015
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]ECLIPSING BINARY ; LIGHT CURVES ; VELOCITY CURVES ; OPTICAL FLARES ; PERIOD CHANGES ; URSAE MAJORIS ; STAR LIGHT ; EVOLUTION ; COMPONENT ; SYSTEMS
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被引频次:2[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/5919
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Wang, JJ (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, POB 110, Kunming 650216, Peoples R China.
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
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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.,...&Wang, JJ .(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).
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