FLIP-FLOP ACTIVITY ON THE W UMa-TYPE BINARY SYSTEM HH UMa
文献类型：期刊论文
| 作者 | Wang, Kun1,2 ; Zhang, Xiaobin1; Deng, Licai1; Luo, Changqing1; Luo, Yangping1,3; Zhang, Jun4
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2015-05-20 |
| 卷号 | 805期号:1 |
| 关键词 | binaries: eclipsing starspots stars: individual (HH UMa) stars: late-type |
| 英文摘要 | We report the discovery of flip-flop activity in a W UMa-type binary. A long-term. multi-color photometric surveillance of HH UMa was carried out with. three sets of light curves obtained over six weeks. The light curves of the eclipsing binary presented marked asymmetry and rapid interchange between the two light maxima. During the observations from 2014 February to 2014 April, the spot distortion phase jumped between phases 0.25 and 0.75 twice, a. typical indication of flip-flop activity. We applied the Wilson-Devinney method to analyze the three light curves. The results indicate that HH UMa is a partially eclipsing contact system of A. subtype with an obviously asymmetric light curve. The observed light curves can be modeled by assuming that there are two dark spots on the massive primary component that are almost persistently located around phases 0.25 and 0.75, but can interchange their intensities. We further suggest that a plausible scenario for explaining the properties of those dark spots is strong surface magnetic activity with a sudden reversal of the more active longitude. We therefore conclude that HH UMa is very likely a W UMa-type system displaying flip-flop activity. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000354991300022 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/5685]  |
| 专题 | 国家天文台_光学天文研究部 |
| 作者单位 | 1.Chinese Acad Sci, Natl Astron Observ, Key Lab Opt Astron, Beijing 100012, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.China West Normal Univ, Sch Phys & Elect Informat, Nanchong 637002, Peoples R China 4.Chinese Acad Sci, Natl Astron Observ, Key Lab Solar Act, Beijing 100012, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Kun,Zhang, Xiaobin,Deng, Licai,et al. FLIP-FLOP ACTIVITY ON THE W UMa-TYPE BINARY SYSTEM HH UMa[J]. ASTROPHYSICAL JOURNAL,2015,805(1). |
| APA | Wang, Kun,Zhang, Xiaobin,Deng, Licai,Luo, Changqing,Luo, Yangping,&Zhang, Jun.(2015).FLIP-FLOP ACTIVITY ON THE W UMa-TYPE BINARY SYSTEM HH UMa.ASTROPHYSICAL JOURNAL,805(1). |
| MLA | Wang, Kun,et al."FLIP-FLOP ACTIVITY ON THE W UMa-TYPE BINARY SYSTEM HH UMa".ASTROPHYSICAL JOURNAL 805.1(2015). |
入库方式： OAI收割
来源：国家天文台
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