An extremely low-mass companion to an F0-type star in a total-eclipsing close binary
文献类型：期刊论文
| 作者 | Chang, Linfeng2,5; Qian, Shengbang2; Zhu LY(朱俐颖)3,4; Li, Yumei1; Zang, Lei2; Li, Fuxing2 |
| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
 |
| 出版日期 | 2025-11 |
| 卷号 | 543期号:4页码:3527-3534 |
| 关键词 | binaries: close binaries: eclipsing stars: pre-main-sequence |
| ISSN号 | 0035-8711 |
| DOI | 10.1093/mnras/staf1500 |
| 产权排序 | 第3完成单位 |
| 文献子类 | Article |
| 英文摘要 | M-type dwarfs orbiting stars earlier than G-type have been reported to exhibit larger radii than those predicted by stellar models. To explain the inconsistencies between observations and models, more precise mass and radius measurements of M-type stars in such kind of binaries are needed to refine evolutionary models. By using photometric data from Transiting Exoplanet Survey Satellite and spectroscopic observations from Large sky Area Multi-Object fiber Spectroscopic Telescope (LAMOST), we conducted a study on the binary system TIC 431124333, finding TIC 431124333 is a total-eclipsing detached binary where an F0-type primary is accompanied by an M-type secondary (F + M) with a short period of 1.88 d. The photometric analysis with the Wilson-Devinney (W-D) code yields a mass ratio of 0.13 +/- 0 . 2. Meanwhile, the mass ratio derived from single-lined radial velocities based on medium-resolution spectra from LAMOST is approximately 0.15, which demonstrates TIC 431124333, as a totally eclipsing binary, can deliver a reliable mass ratio with photometric data. The companion has a mass of 0.16 (2) M- (R) and radius of 0.21 (1) R-(R). Given the exceptionally low mass ratio, the secondary component of TIC 431124333 is highly likely to be formed via disc fragmentation and currently in the pre-main-sequence stage. Collective samples of F + M binaries suggest their M-type companions may still be undergoing gravitational contraction towards the main sequence, in contrast to single M-type stars or low-mass binaries exhibiting radius inflation. Further testing of this hypothesis requires additional systems with precisely determined masses and radii. |
| 学科主题 | 天文学 ; 恒星与银河系 |
| URL标识 | 查看原文 |
| 出版地 | GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND |
| WOS关键词 | PRE-MAIN-SEQUENCE ; ORBITAL PARAMETERS ; LAMOST ; LIGHT ; RADII ; SYSTEMS ; DISK |
| 资助项目 | Natural Science Foundation of Yunnan Province[CMS-CSST-2025-A16]; China Manned Space Program[020GJHZ2023030GC]; International Partership Program of Chinese Academy of Sciences[202503AP140013]; Science Foundation of Yunnan Province[2022YFE0116800]; National Key R&D Program of China[202501AS070055]; National Key R&D Program of China[202401AT070143]; Yunnan Fundamental Research Projects[12303040]; National Natural Science Foundation of China; NASA Science Mission Directorate; Chinese Virtual Observatory (China-VO); Chinese Academy of Sciences and Alibaba Cloud |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001597980200001 |
| 出版者 | OXFORD UNIV PRESS |
| 资助机构 | Natural Science Foundation of Yunnan Province[CMS-CSST-2025-A16] ; China Manned Space Program[020GJHZ2023030GC] ; International Partership Program of Chinese Academy of Sciences[202503AP140013] ; Science Foundation of Yunnan Province[2022YFE0116800] ; National Key R&D Program of China[202501AS070055, 202401AT070143] ; Yunnan Fundamental Research Projects[12303040] ; National Natural Science Foundation of China ; NASA Science Mission Directorate ; Chinese Virtual Observatory (China-VO) ; Chinese Academy of Sciences and Alibaba Cloud |
| 版本 | 出版稿 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/28657]  |
| 专题 | 云南天文台_双星与变星研究组 |
| 通讯作者 | Qian, Shengbang |
| 作者单位 | 1.School of Science, Leshan Normal University, Leshan 614000, China 2.Department of Astronomy, School of Physics and Astronomy, Key Laboratory of Astroparticle Physics of Yunnan Province, Yunnan University, Kunming 650091, China; 3.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, China; 4.University of Chinese Academy of Sciences, No. 1 Yanqihu East Road, Huairou District, Beijing 101408, China; 5.School of Articial Intelligence, Yunnan Open University, Kunming 650599, China; |
| 推荐引用方式 GB/T 7714 | Chang, Linfeng,Qian, Shengbang,Zhu LY,et al. An extremely low-mass companion to an F0-type star in a total-eclipsing close binary[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2025,543(4):3527-3534. |
| APA | Chang, Linfeng,Qian, Shengbang,朱俐颖,Li, Yumei,Zang, Lei,&Li, Fuxing.(2025).An extremely low-mass companion to an F0-type star in a total-eclipsing close binary.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,543(4),3527-3534. |
| MLA | Chang, Linfeng,et al."An extremely low-mass companion to an F0-type star in a total-eclipsing close binary".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 543.4(2025):3527-3534. |
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来源：云南天文台
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