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Inactive Longitude and Superflare in the Active Single-lined Pre-main-sequence Binary V2279 Cyg

文献类型：期刊论文

作者Hu, Xueying7,8; Cang, Tianqi8; Fu, Jian-Ning6,7,8; Wang, Xuan7,8; Xing, Keyu8; Wang, Haotian8; Petit, Pascal5; Wang, Jiaxin4; Yang, Yong1; Zhao, He2,3
刊名ASTROPHYSICAL JOURNAL
出版日期2025-09-01
卷号990期号:1页码:27
ISSN号0004-637X
DOI10.3847/1538-4357/adeb69
产权排序3
英文摘要Young, solar-like stars in the pre-main-sequence (PMS) stage exhibit vigorous magnetic activity that significantly influences their circumstellar environments and the processes of planetary formation and evolution. In binary systems, tidal forces and magnetic interactions can further shape the magnetic geometry. We report a longitudinal preference of starspots, chromospheric activities, and flares in the active single-lined spectroscopic PMS binary system V2279 Cyg, based on long-term photometric observations from Kepler and TESS alongside spectroscopic data from LAMOST. The system is classified as a weak-line T Tauri binary, with component masses estimated at 0.86 M circle dot and 0.27 M circle dot. V2279 Cyg's nearly circular orbit is synchronized with its 4.126 day rotational period. Observations reveal large starspot regions clustered near the far-side hemisphere. Spectroscopic data show strong, double-peak H alpha emission, the strength of which is highly correlated with starspot distribution, indicating the presence of an active longitude on the primary star. We also mapped the prominence structure corotating with the primary star, suggesting a dense structure close to the near-side hemisphere. Furthermore, we identify an inactive longitude of flares during the 4 yr Kepler observations, where the frequency of flare activity is significantly reduced after the superior conjunction, marking the first such identification in active binary systems. Additionally, a white light superflare, releasing energy of 2.5 x 1037 erg, was detected in TESS observations. These findings provide valuable insights into the magnetic field geometry and dynamo processes in PMS binaries, underscoring the critical role of tidal interactions in shaping magnetic activities.
WOS关键词T-TAURI STAR ; SURFACE MAGNETIC ACTIVITY ; LOW-RESOLUTION SPECTRA ; LAMOST OBSERVATIONS ; SLINGSHOT PROMINENCES ; ECLIPSING BINARIES ; MESA ISOCHRONES ; VARIABLE-STARS ; KEPLER FIELD ; FLUX TUBES
资助项目MOST divided by National Natural Science Foundation of China (NSFC)https://doi.org/10.13039/501100001809 ; Chinese Academy of Sciences (CAMS)[2023M730297] ; China Postdoctoral Science Foundation[12273002] ; National Natural Science Foundation of China (NSFC)[12403101] ; NSFC[CMS-CSST-2025-A013] ; China Manned Space Program[ZYYD2025QY27] ; Central Guidance for Local Science and Technology Development Fund[CSTB2023NSCQ-MSX1048] ; Natural Science Foundation of Chongqing (CQCSTC)
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:001555842100001
出版者IOP Publishing Ltd
资助机构MOST divided by National Natural Science Foundation of China (NSFC)https://doi.org/10.13039/501100001809 ; Chinese Academy of Sciences (CAMS) ; China Postdoctoral Science Foundation ; National Natural Science Foundation of China (NSFC) ; NSFC ; China Manned Space Program ; Central Guidance for Local Science and Technology Development Fund ; Natural Science Foundation of Chongqing (CQCSTC)
源URL[http://ir.xao.ac.cn/handle/45760611-7/8066]  
专题研究单元未命名
通讯作者Cang, Tianqi; Fu, Jian-Ning
作者单位1.Kunming Univ, Sch Phys Sci & Technol, Kunming 650214, Peoples R China
2.Chinese Acad Sci, Key Lab Radio Astron, 10 Yuanhua Rd, Nanjing 210033, Peoples R China
3.Chinese Acad Sci, Purple Mt Observ, 10 Yuanhua Rd, Nanjing 210033, Peoples R China
4.Chongqing Univ Posts & Telecommun, Sch Sci, Chongqing 400065, Peoples R China
5.Univ Toulouse, Inst Rech Astrophys & Planetol, CNRS, CNES, 14 Ave Edouard Belin, F-31400 Toulouse, France
6.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Xinjiang, Peoples R China
7.Beijing Normal Univ, Inst Frontiers Astron & Astrophys, Beijing 102206, Peoples R China
8.Beijing Normal Univ, Sch Phys & Astron, Beijing 100875, Peoples R China
推荐引用方式
GB/T 7714		 Hu, Xueying,Cang, Tianqi,Fu, Jian-Ning,et al. Inactive Longitude and Superflare in the Active Single-lined Pre-main-sequence Binary V2279 Cyg[J]. ASTROPHYSICAL JOURNAL,2025,990(1):27.
APA Hu, Xueying.,Cang, Tianqi.,Fu, Jian-Ning.,Wang, Xuan.,Xing, Keyu.,...&Zhao, He.(2025).Inactive Longitude and Superflare in the Active Single-lined Pre-main-sequence Binary V2279 Cyg.ASTROPHYSICAL JOURNAL,990(1),27.
MLA Hu, Xueying,et al."Inactive Longitude and Superflare in the Active Single-lined Pre-main-sequence Binary V2279 Cyg".ASTROPHYSICAL JOURNAL 990.1(2025):27.

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