Simultaneous Optical and Radio Observations of a Large Stellar Flare on EV Lac
文献类型：期刊论文
| 作者 | Lu, Hong-Peng10,11; Zhang, Jia-Le8,9,10; Tian, Hui7,10; Zhang, Li-Yun6; Chen, He-Chao5; Zheng, Jie4; Zhang, Jun-Bo4; Wang JG(王建国)3; Inoue, Shun2; Maehara, Hiroyuki1 |
| 刊名 | ASTROPHYSICAL JOURNAL LETTERS
 |
| 出版日期 | 2025-09-10 |
| 卷号 | 990期号:2 |
| ISSN号 | 2041-8205 |
| DOI | 10.3847/2041-8213/adfc5b |
| 产权排序 | 第9完成单位 |
| 文献子类 | Article |
| 英文摘要 | We present simultaneous optical and radio observations of a large stellar flare on the M dwarf EV Lac, captured between 12:00 and 15:00 UT on 2022 October 25. This event was jointly monitored with the 85 cm and 2.16 m optical telescopes at the Xinglong Observatory, the Five-hundred-meter Aperture Spherical Radio Telescope (FAST), and the Transiting Exoplanet Survey Satellite, enabling a comprehensive view of flare energy release and dynamic evolution. The flare persisted for 138 minutes with a bolometric energy exceeding 1.7 x 1033 erg and exhibited a double-peaked light curve. Temporal H alpha line profiles show Stark broadening and red asymmetry with a redshift of similar to 50 km s-1 near the first flare peak, suggesting downward plasma motion possibly due to chromospheric condensation. Enhanced blue wing emission near the second peak reaches a maximum blueshift of -240 km s-1, indicating a stellar prominence eruption with an estimated mass of 7.3 x 1018-3.3 x 1019 g. Flare blackbody temperature estimates indicate a peak of 12,500 K during the first peak, oscillating between 5500 K and 8100 K near the second peak, and cooling to 3700 K afterward. FAST radio observations reveal positive frequency-drifting, highly polarized bursts consistent with electron cyclotron maser emission modulated by stellar rotation, indicating magnetically trapped energetic electrons during the flare. This unique observation campaign provides a comprehensive view of plasma heating, plasma motions, and electron acceleration during a large stellar flare, offering new insights into the multiwavelength evolution of flare-related plasma processes in stellar atmospheres. |
| 学科主题 | 天文学 ; 恒星与银河系 |
| URL标识 | 查看原文 |
| 出版地 | TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND |
| WOS关键词 | CORONAL MASS EJECTIONS ; H-ALPHA LINE ; SOLAR-TYPE STARS ; M DWARF FLARE ; X-RAY ; CHROMOSPHERIC EVAPORATION ; AD LEO ; PROXIMA CENTAURI ; IMPULSIVE PHASE ; EV-LACERTAE |
| 资助项目 | National Natural Science Foundation of China (NSFC)[12425301]; National Natural Science Foundation of China (NSFC)[12473055]; National Natural Science Foundation of China (NSFC)[12103004]; National Natural Science Foundation of China (NSFC)[12250006]; Guizhou University Natural Science Special Research Fund[202358]; Guizhou Provincial Science and Technology Projects; QKHPTRC-ZDSYS; JSPS KAKENHI[JP24H00248]; JSPS KAKENHI[JP24K00680]; JSPS KAKENHI[25K01041]; Open Project Program of the Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences; National Astronomical Observatories of Chinese Academy of Sciences (NAOC); NASA Explorer Program; Association of Universities for Research in Astronomy, Inc., under NASA[NAS 5-26555] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001561429000001 |
| 出版者 | IOP Publishing Ltd |
| 资助机构 | National Natural Science Foundation of China (NSFC)[12425301, 12473055, 12103004, 12250006] ; Guizhou University Natural Science Special Research Fund[202358] ; Guizhou Provincial Science and Technology Projects[[2023]003] ; QKHPTRC-ZDSYS[[2023]003, QianKeHe-JiChu-MS[2025]695] ; JSPS KAKENHI[JP24H00248, JP24K00680, 25K01041] ; Open Project Program of the Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences ; National Astronomical Observatories of Chinese Academy of Sciences (NAOC) ; NASA Explorer Program ; Association of Universities for Research in Astronomy, Inc., under NASA[NAS 5-26555] |
| 版本 | 出版稿 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/28533]  |
| 专题 | 云南天文台_丽江天文观测站（南方基地） |
| 通讯作者 | Lu, Hong-Peng |
| 作者单位 | 1.Subaru Telescope Okayama Branch Office, NAOJ, NINS, 3037-5, Honjou, Kamogata, Asakuchi, Okayama 719-0232, Japan; 2.Department of Physics, Kyoto University, Kitashirakawa-Oiwake-cho, Sakyo-ku, Kyoto, 606-8502, Japan; 3.Yunnan Observatories, Chinese Academy of Sciences, 396 Yangfangwang, Guandu District, Kunming, 650216, People’s Republic of China; 4.National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, People’s Republic of China; 5.School of Physics and Astronomy, Yunnan University, Kunming 650500, People’s Republic of China; 6.College of Physics, Guizhou University, Guiyang 550025, People’s Republic of China; 7.State Key Laboratory of Solar Activity and Space Weather, National Space Science Center, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China; 8.Kapteyn Astronomical Institute, University of Groningen, P.O. Box 800, 9700 AV, Groningen, The Netherlands; 9.ASTRON, Netherlands Institute for Radio Astronomy, Oude Hoogeveensedijk 4, Dwingeloo, 7991 PD, The Netherlands; 10.School of Earth and Space Sciences, Peking University, Beijing 100871, People’s Republic of China; huitian@pku.edu.cn; |
| 推荐引用方式 GB/T 7714 | Lu, Hong-Peng,Zhang, Jia-Le,Tian, Hui,et al. Simultaneous Optical and Radio Observations of a Large Stellar Flare on EV Lac[J]. ASTROPHYSICAL JOURNAL LETTERS,2025,990(2). |
| APA | Lu, Hong-Peng.,Zhang, Jia-Le.,Tian, Hui.,Zhang, Li-Yun.,Chen, He-Chao.,...&Namekata, Kosuke.(2025).Simultaneous Optical and Radio Observations of a Large Stellar Flare on EV Lac.ASTROPHYSICAL JOURNAL LETTERS,990(2). |
| MLA | Lu, Hong-Peng,et al."Simultaneous Optical and Radio Observations of a Large Stellar Flare on EV Lac".ASTROPHYSICAL JOURNAL LETTERS 990.2(2025). |
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