Stellar Cycle and Evolution of Polar Spots in an M plus WD Binary

doi:10.3847/1538-4357/ad1e64

	Stellar Cycle and Evolution of Polar Spots in an M plus WD Binary
	Zhao, Xinlin 5,6; Wang, Song 4,6; Li, Xue 5,6; Xiang Y(项越)2,3; Xu FK(徐甫坤)2,3; Gu SH(顾盛宏)2,3,5; Du, Bing 6; Liu, Jifeng 1,4,5,6
刊名	ASTROPHYSICAL JOURNAL
	2024-03-01
卷号	963 期号:2
ISSN号	0004-637X
DOI	10.3847/1538-4357/ad1e64
产权排序	第4完成单位
文献子类	Article
英文摘要	Stellar activity cycles reveal continuous relaxation and induction of magnetic fields. The activity cycle is typically traced through the observation of cyclic variations in total brightness or Ca H&K emission flux of stars, as well as cyclic variations in the orbital periods of binary systems. In this work, we report the identification of a semidetached binary system (TIC 16320250) consisting of a white dwarf (0.67 M circle dot) and an active M dwarf (0.56 M circle dot). The long-term multiband optical light curves spanning twenty years revealed three repeated patterns, suggestive of a possible activity cycle of about 10 years of the M dwarf. Light-curve fitting indicates the repeated variation is caused by the evolution, particularly the motion, of polar spots. The significant Ca H&K, H alpha, ultra-violet, and X-ray emissions imply that the M dwarf is one of the most magnetically active stars. We propose that in the era of large time-domain photometric sky surveys (e.g., ASAS-SN, Zwicky Transient Facility, LSST, Sitian), long-term light-curve modeling can be a valuable tool for tracing and revealing stellar activity cycle, especially for stars in binary systems.
学科主题	天文学
URL标识	查看原文
出版地	TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
资助项目	Guoshoujing Telescope (the Large Sky Area Multi-Object Fiber Spectroscopic Telescope); National Development and Reform Commission; Chinese Academy of Sciences - TAP member institutes; Gaia Multilateral Agreement (MLA); Astropy package for the detection and photometry of astronomical sources; National Science Foundation of China (NSFC)[11988101/11933004/11833002/12090042/12103047/12273057]; National Key Research and Development Program of China (NKRDPC)[2019YFA0405504]; National Key Research and Development Program of China (NKRDPC)[2019YFA0405000]; Strategic Priority Program of the Chinese Academy of Sciences[XDB41000000]; China Manned Space Project[CMS-CSST-2021-A08]; Yunnan Fundamental Research Projects[202201AT070186]; Yunnan Fundamental Research Projects[202305AS350009]; International Centre of Supernovae, Yunnan Key Laboratory[202302AN360001]; Youth Innovation Promotion Association of the CAS[2019057]
WOS关键词	MAGNETIC-FLUX TUBES ; X-RAY ACTIVITY ; SURFACE-STRUCTURE ; STARS ; PERIOD ; LONG ; PHYSICS ; DYNAMICS ; DWARFS ; IMAGES
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	IOP Publishing Ltd
WOS记录号	WOS:001181069000001
资助机构	Guoshoujing Telescope (the Large Sky Area Multi-Object Fiber Spectroscopic Telescope) ; National Development and Reform Commission ; Chinese Academy of Sciences - TAP member institutes ; Gaia Multilateral Agreement (MLA) ; Astropy package for the detection and photometry of astronomical sources ; National Science Foundation of China (NSFC)[11988101/11933004/11833002/12090042/12103047/12273057] ; National Key Research and Development Program of China (NKRDPC)[2019YFA0405504, 2019YFA0405000] ; Strategic Priority Program of the Chinese Academy of Sciences[XDB41000000] ; China Manned Space Project[CMS-CSST-2021-A08] ; Yunnan Fundamental Research Projects[202201AT070186, 202305AS350009] ; International Centre of Supernovae, Yunnan Key Laboratory[202302AN360001] ; Youth Innovation Promotion Association of the CAS[2019057]
内容类型	期刊论文
版本	出版稿
源URL	[http://ir.ynao.ac.cn/handle/114a53/26553]
专题	云南天文台_系外行星研究组
作者单位	1.New Cornerstone Science Laboratory, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, People's Republic of China 2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650216, People's Republic of China; 3.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, People's Republic of China; 4.Institute for Frontiers in Astronomy and Astrophysics, Beijing Normal University, Beijing 102206, People's Republic of China; 5.School of Astronomy and Space Sciences, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China; 6.Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, People's Republic of China songw@bao.ac.cn;
推荐引用方式 GB/T 7714	Zhao, Xinlin,Wang, Song,Li, Xue,et al. Stellar Cycle and Evolution of Polar Spots in an M plus WD Binary[J]. ASTROPHYSICAL JOURNAL,2024,963(2).
APA	Zhao, Xinlin.,Wang, Song.,Li, Xue.,项越.,徐甫坤.,...&Liu, Jifeng.(2024).Stellar Cycle and Evolution of Polar Spots in an M plus WD Binary.ASTROPHYSICAL JOURNAL,963(2).
MLA	Zhao, Xinlin,et al."Stellar Cycle and Evolution of Polar Spots in an M plus WD Binary".ASTROPHYSICAL JOURNAL 963.2(2024).