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题名:
Rapid Light-curve Changes and Probable Flip-flop Activity of the W UMa-type Binary V410 Aur
作者: Luo Xia(罗夏)1; Wang Kun(王坤)2; Zhang Xiaobin(张孝斌)3; Deng Licai(邓李才)3; Luo Yangping(罗杨平)2; Luo Changqing(罗常青)3
关键词: binaries: eclipsing ; stars: individual (V410 Aur) ; stars: late-type ; stars: starspots
刊名: ASTRONOMICAL JOURNAL
发表日期: 2017-09-01
DOI: 10.3847/1538-3881/aa8325
卷: 154, 期:3
文章类型: Article
收录类别: SCI
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Astronomy & Astrophysics
研究领域[WOS]: Astronomy & Astrophysics
关键词[WOS]: CONTACT BINARIES ; ACTIVITY CYCLES ; URSAE MAJORIS ; ANGULAR-MOMENTUM ; STAR LIGHT ; MASS ; SYSTEMS ; COMPONENTS ; LONGITUDES ; EVOLUTION
英文摘要: New photometric observations of a W UMa system, V410 Aur, were carried out over 10 nights from 2014 December 19 to 2015 February 8, from which four sets of light curves were obtained. The light curves show many unusual behavioral features, including changing occultation depths, transit minima, and asymmetric maxima. The four sets of light curves have been separately analyzed with the Wilson-Devinney method. The results suggest a totally eclipsing contact configuration for the system. Over a surprisingly short time span of only 52 days, the dominant spot distortion phase jumped twice between phases 0.0 and 0.5. The light-curve variations can be interpreted by the presence of two cool spots on the massive component. Based on our analysis, it is further suggested that the peculiar behavioral patterns are probably caused by the presence of two permanent, active large spots separated in longitude by about 180 degrees, whose locations remain almost unchanged throughout. Our study demonstrates that the system has been undergoing typical flip-flop activity. We therefore conclude that V410 Aur is a W UMa-type system exhibiting flip-flop activity.
语种: 英语
项目资助者: National Natural Science Foundation of China(11633005 ; 11473037 ; 11373037 ; 11303021)
WOS记录号: WOS:000407778700003
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内容类型: 期刊论文
URI标识: http://ir.bao.ac.cn/handle/114a11/20141
Appears in Collections:光学天文研究部_期刊论文

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作者单位: 1.Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China
2.China West Normal Univ, Dept Astron, Nanchong 637002, Peoples R China
3.Chinese Acad Sci, Natl Astron Observ, Key Lab Opt Astron, Beijing 100012, Peoples R China

Recommended Citation:
Luo, Xia,Wang, Kun,Zhang, Xiaobin,et al. Rapid Light-curve Changes and Probable Flip-flop Activity of the W UMa-type Binary V410 Aur[J]. ASTRONOMICAL JOURNAL,2017,154(3).
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