Spot and Facula Activity Variations of the Eccentric Detached Eclipsing Binary KIC 8098300 Based on the Time-series Orbital Solutions
文献类型：期刊论文
| 作者 | Niu, Hu-Biao3,4 ; Fu, Jian-Ning4; Wang, Jia-Xin4; Li, Chun-Qian1,2
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| 刊名 | RESEARCH IN ASTRONOMY AND ASTROPHYSICS
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| 出版日期 | 2022 |
| 卷号 | 22期号:1页码:15 |
| ISSN号 | 1674-4527 |
| 关键词 | (stars:) binaries: eclipsing (stars:) starspots stars: individual (KIC 8098300) |
| DOI | 10.1088/1674-4527/ac3898 |
| 通讯作者 | Fu, Jian-Ning(jnfu@bnu.edu.cn) |
| 英文摘要 | The LAMOST spectra and Kepler light curves are combined to investigate the detached eclipsing binary KIC 8098300, which shows the O'Connell effect caused by spot/facula modulation. The radial velocity (RV) measurements are derived by using the tomographic spectra disentangling technology. The mass ratio q = K (1)/K (2) = 0.812 +/- 0.007, and the orbital semimajor axis a sin i =14.984 +/- 0.048R(circle dot) are obtained by fitting the RV curves. We optimize the binary model concerning the spot/facula activity with the code PHOEBE and obtain precise parameters of the orbit including the eccentricity e = 0.0217 +/- 0.0008, the inclination i = 87.degrees 71 +/- 0.degrees 04, and the angle of periastron omega = 284.degrees 1 +/- 0.degrees 5. The masses and radii of the primary and secondary star are determined as M-1 = 1.3467 +/- 0.0001 M-circle dot, R-1 = 1.569 +/- 0.003 R-circle dot, and M-2 = 1.0940 +/- 0.0001 M-circle dot, R (2) = 1.078 +/- 0.002 R (circle dot), respectively. The ratio of temperatures of the two component stars is r(teff) = 0.924 +/- 0.001. We also obtain the periastron precession speed of 0.000024 +/- 0.000001 day cycle(-1). The residuals of out-of-eclipse are analyzed using the auto-correlation function and the discrete Fourier transform. The spot/facula activity is relatively weaker, but the lifetime is longer than that of most single main sequence stars in the same temperature range. The average rotation period of the spots P-rot = 4.32 days is slightly longer than the orbital period, which may be caused by either the migration of spots/faculae along the longitude or the latitudinal differential rotation. The activity may be spot-dominated for the secondary star and facula-dominated for the primary star. The method of this work can be used to analyze more eclipsing binaries with the O'Connell effect in the Kepler field to obtain the precise parameters and investigate the difference of spot behavior between binaries and single stars. It is helpful for a deeper understanding of the stellar magnetic activity and dynamo theory. |
| WOS关键词 | DIFFERENTIAL ROTATION ; STARSPOT LIFETIMES ; SPECTRAL-ANALYSIS ; KEPLER ; SEPARATION ; PERIOD |
| 资助项目 | National Natural Science Foundation of China (NSFC)[11833002] ; National Natural Science Foundation of China (NSFC)[12090040] ; National Natural Science Foundation of China (NSFC)[12090042] ; National Development and Reform Commission ; NASA Science Mission directorate |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| 出版者 | NATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES |
| WOS记录号 | WOS:000746169100001 |
| 资助机构 | National Natural Science Foundation of China (NSFC) ; National Development and Reform Commission ; NASA Science Mission directorate |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/4447]  |
| 专题 | 新疆天文台_光学天文与技术应用研究室 |
| 通讯作者 | Fu, Jian-Ning |
| 作者单位 | 1.Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Natl Astron Observ, Key Lab Opt Astron, Beijing 100101, Peoples R China 3.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China 4.Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China |
| 推荐引用方式 GB/T 7714 | Niu, Hu-Biao,Fu, Jian-Ning,Wang, Jia-Xin,et al. Spot and Facula Activity Variations of the Eccentric Detached Eclipsing Binary KIC 8098300 Based on the Time-series Orbital Solutions[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2022,22(1):15. |
| APA | Niu, Hu-Biao,Fu, Jian-Ning,Wang, Jia-Xin,&Li, Chun-Qian.(2022).Spot and Facula Activity Variations of the Eccentric Detached Eclipsing Binary KIC 8098300 Based on the Time-series Orbital Solutions.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,22(1),15. |
| MLA | Niu, Hu-Biao,et al."Spot and Facula Activity Variations of the Eccentric Detached Eclipsing Binary KIC 8098300 Based on the Time-series Orbital Solutions".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 22.1(2022):15. |
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