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HD 26172: an active solar-type subgiant in a close binary system

文献类型：期刊论文

作者Meng FB(孟芳斌)1,4; Zhu LY(朱俐颖)1,4; Qian, Sheng-Bang2; Liu NP(刘念平)4; Zhang J(张嘉)4; Mkrtichian, David3; Boonrucksar, Soonthornthum3; Zhao EG(赵二刚)4
刊名MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
出版日期2026-02
卷号545期号:4
关键词stars: activity binaries: eclipsing stars: individual: HD 26172
ISSN号0035-8711
DOI10.1093/mnras/staf2257
产权排序第1完成单位
文献子类Article
英文摘要We present the first comprehensive photometric and spectroscopic analysis of the RS CVn system HD 26172, robustly determining the previously debated evolutionary state of its primary star. Since this system is a single-lined spectroscopic binary with spot-induced light curve modulations, we derived its physical parameters by combining the TESS light curves, the radial velocity curve from our observations, and the primary-star mass estimates based on three complementary methods. Our results reveal that HD 26172 is a detached binary system composed of a 1.25 +/- 0.32 M-circle dot subgiant and a 0.63 +/- 0.11 M-circle dot main-sequence star. The conclusion of subgiant primary is also supported by the absence of lithium absorption and no observed infrared excess. Using long-term photometry from the KWS survey, we detected a tentative stellar activity cycle of 5635 d with an amplitude of 0.04 mag in HD 26172. Additionally, we identified ten optical flare events exhibiting temporally clustered outburst behaviour. The presence of a long-term activity cycle, pronounced starspot activity, and frequent optical flares makes HD 26172 a valuable laboratory for studying magnetic activity in subgiants within close binary systems.
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RS-CVN ; ECLIPSING BINARIES ; LIGHT CURVES ; STARS ; EVOLUTION ; ORBITS ; TEMPERATURE ; PARAMETERS ; ROTATION ; VELOCITY
资助项目International Partnership Program of the Chinese Academy of Sciences[020GJHZ2023030GC]; Yunnan Fundamental Research Projects[202503AP140013]; Yunnan Fundamental Research Projects[202401AS070046]; Yunnan Fundamental Research Projects[202501AS070055]; Yunnan Revitalization Talent Support Program; Chinese Academy of Sciences President's International Fellowship Initiative[2025PVA0089]; NASA's Science Mission Directorate; National Astronomical Observatories, Chinese Academy of Sciences; European Space Agency (ESA) mission Gaia by the Gaia Data Processing and Analysis Consortium (DPAC)
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:001660548600001
出版者OXFORD UNIV PRESS
资助机构International Partnership Program of the Chinese Academy of Sciences[020GJHZ2023030GC] ; Yunnan Fundamental Research Projects[202503AP140013, 202401AS070046, 202501AS070055] ; Yunnan Revitalization Talent Support Program ; Chinese Academy of Sciences President's International Fellowship Initiative[2025PVA0089] ; NASA's Science Mission Directorate ; National Astronomical Observatories, Chinese Academy of Sciences ; European Space Agency (ESA) mission Gaia by the Gaia Data Processing and Analysis Consortium (DPAC)
版本出版稿
源URL[http://ir.ynao.ac.cn/handle/114a53/28863]  
专题云南天文台_双星与变星研究组
通讯作者Zhu LY(朱俐颖)
作者单位1.University of Chinese Academy of Sciences, No.1 Yanqihu East Rd, Huairou District, Beijing 101408, People’s Republic of China;
2.Department of Astronomy, School of Physics and Astronomy, Yunnan University, Kunming 650091, People’s Republic of China;
3.National Astronomical Research Institute of Thailand, 191 Siriphanich Bldg., Huay Kaew Rd., Chiang Mai 50200, Thailand
4.Yunnan Observatories, Chinese Academy of Sciences (CAS), Kunming 650216, People’s Republic of China;
推荐引用方式
GB/T 7714		 Meng FB,Zhu LY,Qian, Sheng-Bang,et al. HD 26172: an active solar-type subgiant in a close binary system[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2026,545(4).
APA 孟芳斌.,朱俐颖.,Qian, Sheng-Bang.,刘念平.,张嘉.,...&赵二刚.(2026).HD 26172: an active solar-type subgiant in a close binary system.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,545(4).
MLA 孟芳斌,et al."HD 26172: an active solar-type subgiant in a close binary system".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 545.4(2026).

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