Institutional Repository of Optical Astronomy Research Laboratory
| The first low-mass eclipsing binary within the fully convective zone from TMTS | |
Liu, Cheng1; Wang, Xiaofeng1,2,3; Zhang, Xiaobing4; Kovalev, Mikhail5; Lin, Jie2,3,6; Xi, Gaobo2,3; Mo, Jun2,3; Li, Gaici2,3; Peng, Haowei2,3; Li, Xin1; Xia, Qiqi2,3; Iskandar, Abdusamatjan7; Zeng, Xiangyun8; Wang, Letian7 ; Zhu, Liying5; Song, Xuan1; Guo, Jincheng1; Jiang, Xiaojun4; Yan, Shengyu2,3; Zhang, Jicheng9
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| 2024-05-13 | |
| Source Publication | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
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| ISSN | 0035-8711 |
| Volume | 531Issue:1Pages:1765-1775 |
| Contribution Rank | 6 |
| Abstract | We present a comprehensive photometric and spectroscopic analysis of the short-period (similar to 5.32 h) and low-mass eclipsing binary TMTSJ0803 discovered by Tsinghua-Ma Huateng Telescope for Survey (TMTS). By fitting the light curves and radial velocity data with the Wilson-Devinney code, we find that the binary is composed of two late spotted active M dwarfs below the fully convective boundary. This is supported by the discovery of a significant Balmer emission lines in the LAMOST spectrum and prominent coronal X-ray emission. In comparison with the typical luminosity of rapidly rotating fully convective stars, the much brighter X-ray luminosity (L-X/L-bol = 0.0159 +/- 0.0059) suggests the stellar magnetic activity of fully convective stars could be enhanced in such a close binary system. Given the metallicity of [M/H] = - 0.35 dex as inferred from the LAMOST spectrum, we measure the masses and radii of both stars to be M-1 = 0.169 +/- 0.010 M-circle dot, M-2 = 0.162 +/- 0.016 M-circle dot, R-1 = 0.170 +/- 0.006 R-circle dot, and R-2 = 0.156 +/- 0.006 R-circle dot, respectively. Based on the luminosity ratio from the light-curve modelling, the effective temperatures of two components are also estimated. In comparison with the stellar evolution models, the radii, and effective temperatures of two components are all below the isochrones. The radius deflation might be mainly biased by a small radial velocity (RV) data or (and) a simple correction on RVs, while the discrepancy in effective temperature might be due to the enhanced magnetic activity in this binary. |
| Keyword | binaries: eclipsing binaries: spectroscopic stars: individual: TMTSJ0803 stars: low-mass |
| DOI | 10.1093/mnras/stae1266 |
| Indexed By | SCI |
| Language | 英语 |
| WOS Keyword | M-DWARF BINARY ; EVOLUTIONARY MODELS ; MAIN-SEQUENCE ; EBLM PROJECT ; LIGHT CURVES ; DATA RELEASE ; STAR LIGHT ; DARKENING COEFFICIENTS ; ABSOLUTE DIMENSIONS ; CHEMICAL ABUNDANCES |
| Funding Project | National Natural Science Foundation of China[12033003] ; National Natural Science Foundation of China[12288102] ; National Natural Science Foundation of China[12203006] ; National Natural Science Foundation of China[1242016] ; Beijing Natural Science Foundation[BS202002] ; Beijing Natural Science Foundation[24CE-YS-08] ; Beijing Natural Science Foundation[23CB061] ; Beijing Natural Science Foundation[23CB059] ; Science Program[24CD012] ; Popular Science Project ; Beijing Academy of Science and Technology ; Tencent Xplorer Prize - National Development and Reform Commission ; Chinese Academy of Sciences |
| WOS Research Area | Astronomy & Astrophysics |
| WOS Subject | Astronomy & Astrophysics |
| WOS ID | WOS:001231710600010 |
| Publisher | OXFORD UNIV PRESS |
| Funding Organization | National Natural Science Foundation of China ; National Natural Science Foundation of China ; Beijing Natural Science Foundation ; Science Program ; Popular Science Project ; Beijing Academy of Science and Technology ; Tencent Xplorer Prize - National Development and Reform Commission ; Chinese Academy of Sciences |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.xao.ac.cn/handle/45760611-7/6761 |
| Collection | 光学天文与技术应用研究室_变星研究团组 |
| Corresponding Author | Liu, Cheng; Wang, Xiaofeng; Zhang, Xiaobing |
| Affiliation | 1.Beijing Planetarium, Dept Sci Res, Beijing 100044, Peoples R China 2.Tsinghua Univ, Phys Dept, Beijing 100084, Peoples R China 3.Tsinghua Univ, Tsinghua Ctr Astrophys, Beijing 100084, Peoples R China 4.Chinese Acad Sci, CAS Key Lab Opt Astron, Natl Astron Observ, Beijing 100101, Peoples R China 5.Chinese Acad Sci, Yunnan Observ, Kunming 650216, Peoples R China 6.Univ Sci & Technol China, Sch Astron & Space Sci, Hefei 230026, Peoples R China 7.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Xinjiang, Peoples R China 8.China Three Gorges Univ, Ctr Astron & Space Sci, Yichang 443000, Peoples R China 9.Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China |
| Recommended Citation GB/T 7714 | Liu, Cheng,Wang, Xiaofeng,Zhang, Xiaobing,et al. The first low-mass eclipsing binary within the fully convective zone from TMTS[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2024,531(1):1765-1775. |
| APA | Liu, Cheng.,Wang, Xiaofeng.,Zhang, Xiaobing.,Kovalev, Mikhail.,Lin, Jie.,...&Zhang, Jicheng.(2024).The first low-mass eclipsing binary within the fully convective zone from TMTS.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,531(1),1765-1775. |
| MLA | Liu, Cheng,et al."The first low-mass eclipsing binary within the fully convective zone from TMTS".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 531.1(2024):1765-1775. |
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| Liu-2024-The first l（1374KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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