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Analysis of Six Long-period Low-mass Eclipsing Binaries

文献类型：期刊论文

作者Pan, Yang1,8; Frasca, Antonio2; Wang, Jiaxin3; Fu, Jianning4,5,6; Zhang, Xiaobin7
刊名ASTRONOMICAL JOURNAL
出版日期2025-11-03
卷号170期号:5页码:252
ISSN号0004-6256
DOI10.3847/1538-3881/ae04ed
产权排序7
英文摘要The radius inflation is predominantly observed in short-period, low-mass stellar systems, while being rarely detected in long-period binaries. Using Transiting Exoplanet Survey Satellite photometric and Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) spectroscopic survey data, we conducted a detailed photometric and spectroscopic analysis of six long-period (P > 7 days) detached eclipsing binaries: TIC 17303250, TIC 196817076, TIC 219488423, TIC 252991035, TIC 344753509, and TIC 72696540. Our results indicate that the first five systems are composed of low-mass stars (M <= 0.8M(circle dot)), while TIC 72696540 is likely composed of subgiant stars with M-1 = 1.267 +/- 0.011M(circle dot), R-1 = 2.365 +/- 0.043R(circle dot), and M-2 = 1.281 +/- 0.011M(circle dot), R-2 = 2.517 +/- 0.035R(circle dot). Their large radii are solely due to their evolutionary stage. Apart from TIC 72696540, none of the components of these systems displays a clear Li I lambda 6708 line. Under the assumption of binary rotational synchronization, the rotational velocities of these low-mass stars are found to be less than 8 km s(-1), which is the upper limit related to the LAMOST-MRS resolution. Notably, however, significant radius inflation is evident in the systems TIC 17303250, TIC 344753509, and TIC 252991035. Their radii exceed the predictions of the 12 Gyr isochrones. A positive correlation between radius inflation and metallicity is evident in four of the five low-mass stars, with TIC 196817076 being the sole exception. These results suggest that metallicity may play a significant role in causing radius inflation.
WOS关键词CHROMOSPHERICALLY ACTIVE STARS ; RS CVN BINARIES ; MOVING GROUPS ; TESS ; EVOLUTION ; PHYSICS ; RADII ; VELOCITIES ; CATALOG ; ASTROPY
资助项目National Natural Science Foundation of China (NSFC)[12403036] ; Centre National d'Etudes Spatiales (CNES, France) ; NSFC[12373037] ; NSFC[12203010] ; China Manned Space Program[CMS-CSST-2025-A013] ; Tianchi Talent Introduction Plan ; Central Guidance for Local Science and Technology Development Fund[ZYYD2025QY27] ; Sichuan Science and Technology Program[2025ZNSFSC0875] ; China Scholarship Council[202308510133] ; Fundamental Research Funds of China West Normal University[22kE037] ; Guoshoujing Telescope (the Large Sky Area Multi-Object Fiber Spectroscopic Telescope, LAMOST) ; National Development and Reform Commission ; Chinese Academy of Sciences ; Space Telescope Science Institute: TESS
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:001587446400001
出版者IOP Publishing Ltd
资助机构National Natural Science Foundation of China (NSFC) ; Centre National d'Etudes Spatiales (CNES, France) ; NSFC ; China Manned Space Program ; Tianchi Talent Introduction Plan ; Central Guidance for Local Science and Technology Development Fund ; Sichuan Science and Technology Program ; China Scholarship Council ; Fundamental Research Funds of China West Normal University ; Guoshoujing Telescope (the Large Sky Area Multi-Object Fiber Spectroscopic Telescope, LAMOST) ; National Development and Reform Commission ; Chinese Academy of Sciences ; Space Telescope Science Institute: TESS
源URL[http://ir.xao.ac.cn/handle/45760611-7/8214]  
专题研究单元未命名
通讯作者Pan, Yang; Frasca, Antonio
作者单位1.China West Normal Univ, Sch Phys & Astron, Nanchong 637002, Peoples R China
2.INAF Osservatorio Astrofisico Catania, Via S Sofia 78, I-95123 Catania, Italy
3.Chongqing Univ Posts & Telecommun, Sch Sci, Chongqing 400065, Peoples R China
4.Beijing Normal Univ, Inst Frontiers Astron & Astrophys, Beijing 102206, Peoples R China
5.Beijing Normal Univ, Sch Phys & Astron, Beijing 100875, Peoples R China
6.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Xinjiang, Peoples R China
7.Chinese Acad Sci, Key Lab Opt Astron, Natl Astron Observ, Beijing 100012, Peoples R China
8.Univ Toulouse, Inst Rech Astrophys & Planetol, CNRS, CNES, 14 Ave Edouard Belin, F-31400 Toulouse, France
推荐引用方式
GB/T 7714		 Pan, Yang,Frasca, Antonio,Wang, Jiaxin,et al. Analysis of Six Long-period Low-mass Eclipsing Binaries[J]. ASTRONOMICAL JOURNAL,2025,170(5):252.
APA Pan, Yang,Frasca, Antonio,Wang, Jiaxin,Fu, Jianning,&Zhang, Xiaobin.(2025).Analysis of Six Long-period Low-mass Eclipsing Binaries.ASTRONOMICAL JOURNAL,170(5),252.
MLA Pan, Yang,et al."Analysis of Six Long-period Low-mass Eclipsing Binaries".ASTRONOMICAL JOURNAL 170.5(2025):252.

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