KM UMa: An Active Short-period Detached Eclipsing Binary in a Hierarchical Quadruple System
文献类型：期刊论文
| 作者 | Meng FB(孟芳斌)2,3 ; Zhu LY(朱俐颖)2,3; Liu NP(刘念平)3; Li P(李平)2,3; Zhang J(张嘉)3; Li LJ(李临甲)3; Matekov, Azizbek1,2,3
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2024-10-01 |
| 卷号 | 974期号:1 |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/ad6df7 |
| 产权排序 | 第1完成单位 |
| 文献子类 | Article |
| 英文摘要 | The first detailed photometric and spectroscopic analysis of the G-type eclipsing binary KM UMa is presented, which indicates that the system is a short-period detached eclipsing binary. The radial velocity curves were calculated using the cross-correlation function method based on Large Sky Area Multi-Object Fiber Spectroscopic Telescope, Sloan Digital Sky Survey, and our observations, which determined the mass ratio as q = 0.45 (+/- 0.04). Based on the light curves from the Transiting Exoplanet Survey Satellite, other survey data, and our multiband observations, the positive and negative O'Connell effects have been detected evolving gradually and alternately over the last 20 yr, which can be explained by the presence of spots on the primary component. A superflare event was detected in the SuperWASP data on 2007 February 28, further indicating that KM UMa is a very active system. We calculated its energy to be 5 x 1034 erg by assuming it occurred on the primary star. Utilizing hundreds of medium-resolution spectra and one low-resolution spectrum, the equivalent width variations of the H alpha line were calculated, indicating the presence of a 5.21 (+/- 0.67) yr magnetic activity cycle. The orbital period variations were analyzed using the O-C method, detecting a long-term decrease superimposed with a periodic variation. The amplitude of the cyclic variation is 0.01124 (+/- 0.00004) day, with a period of 33.66 (+/- 0.0012) yr, which exceeds the 5.21 yr activity cycle, suggesting that this is more likely attributable to the light travel time effect of a third body. Simultaneously, a visual companion has been detected based on the Gaia astrometric data, indicating that KM UMa is actually in a 2+1+1 hierarchical quadruple system. |
| 学科主题 | 天文学 ; 恒星与银河系 |
| URL标识 | 查看原文 |
| 出版地 | TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND |
| WOS关键词 | ACTIVITY CYCLES ; LIGHT CURVES ; STARS ; MULTIPLICITY |
| 资助项目 | International Cooperation Projects of the National Key RD Program[2022YFE0127300]; Science Foundation of Yunnan Province[202401AS070046]; International Partership Program of Chinese Academy of Sciences[020GJHZ2023030GC]; Agency of innovative development under the Ministry of Higher Education, Science and Innovation of the Republic of Uzbekistan[AL-5921122128]; CAS'Light of West China' Program; Yunnan Revitalization Talent Support Program |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001328731300001 |
| 出版者 | IOP Publishing Ltd |
| 资助机构 | International Cooperation Projects of the National Key RD Program[2022YFE0127300] ; Science Foundation of Yunnan Province[202401AS070046] ; International Partership Program of Chinese Academy of Sciences[020GJHZ2023030GC] ; Agency of innovative development under the Ministry of Higher Education, Science and Innovation of the Republic of Uzbekistan[AL-5921122128] ; CAS'Light of West China' Program ; Yunnan Revitalization Talent Support Program |
| 版本 | 出版稿 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/27636]  |
| 专题 | 云南天文台_双星与变星研究组 |
| 作者单位 | 1.Ulugh Beg Astronomical Institute, Uzbekistan Academy of Sciences, 33 Astronomicheskaya str., Tashkent, 100052, Uzbekistan 2.University of Chinese Academy of Sciences, No. 1 Yanqihu East Rd, Huairou District, 101408, Beijing, People's Republic of China; 3.Yunnan Observatories, Chinese Academy of Sciences (CAS), 650216, Kunming, People's Republic of China; zhuly@ynao.ac.cn; |
| 推荐引用方式 GB/T 7714 | Meng FB,Zhu LY,Liu NP,et al. KM UMa: An Active Short-period Detached Eclipsing Binary in a Hierarchical Quadruple System[J]. ASTROPHYSICAL JOURNAL,2024,974(1). |
| APA | 孟芳斌.,朱俐颖.,刘念平.,李平.,张嘉.,...&Matekov, Azizbek.(2024).KM UMa: An Active Short-period Detached Eclipsing Binary in a Hierarchical Quadruple System.ASTROPHYSICAL JOURNAL,974(1). |
| MLA | 孟芳斌,et al."KM UMa: An Active Short-period Detached Eclipsing Binary in a Hierarchical Quadruple System".ASTROPHYSICAL JOURNAL 974.1(2024). |
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来源：云南天文台
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