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Flaring-associated Complex Dynamics in Two M Dwarfs Revealed by Fast, Time-resolved Spectroscopy

文献类型：期刊论文

作者Wang, J.1,2; Li, H. L.2; Xin, L. P.2; Li, G. W.2; Bai, J. Y.2; Gao, C.1,2,3; Ren, B.1,2,3; Song, D.1,2,3; Deng, J. S.2,3; Han, X. H.2
刊名ASTROPHYSICAL JOURNAL
出版日期2022-08-01
卷号934期号:2页码:11
ISSN号0004-637X
DOI10.3847/1538-4357/ac7a35
英文摘要Habitability of an exoplanet is believed to be profoundly affected by activities of the host stars, although the related coronal mass ejections (CMEs) are still rarely detected in solar-like and late-type stars. We here report an observational study on the flares of two M dwarfs triggered by the high-cadence survey performed by the Ground-based Wide Angle Camera system. In both events, the fast, time-resolved spectroscopy enables us to identify symmetric broad H alpha emission with not only a nearly zero bulk velocity, but also a large projected maximum velocity as high as similar to 700-800 km s(-1). This broadening could be resulted from either the Stark (pressure) effect or a flaring-associated CME at the stellar limb. In the context of the CME scenario, the CME mass is estimated to be similar to 4 x 10(18) and 2 x 10(19) g. In addition, our spectral analysis reveals a temporal variation of the line center of the narrow H alpha emission in both events. The variation amplitudes are at tens of kilometers per second, which could be ascribed to the chromospheric evaporation in one event, and to a binary scenario in the other one. With the total flaring energy determined from our photometric monitor, we show a reinforced trend in which the larger the flaring energy, the higher the CME mass is.
WOS关键词MAIN-SEQUENCE STAR ; X-RAY-EMISSION ; CORONAL MASS EJECTIONS ; H-ALPHA ; MAGNETIC RECONNECTION ; SOLAR-FLARES ; CHROMOSPHERIC EMISSION ; 2-RIBBON FLARE ; STELLAR FLARE ; ROTATION
资助项目National Key Research and Development Project of China[2020YFE0202100] ; Natural Science Foundation of Guangxi[2020GXNSFDA238018] ; Bagui Young Scholars Program ; National Natural Science Foundation of China[12173009] ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences[XDA15052600] ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences[XDA15016500] ; Open Project Program of the Key Laboratory of Optical Astronomy, NAOC, CAS ; NASA
WOS研究方向Astronomy & Astrophysics
语种英语
出版者IOP Publishing Ltd
WOS记录号WOS:000832431800001
资助机构National Key Research and Development Project of China ; National Key Research and Development Project of China ; Natural Science Foundation of Guangxi ; Natural Science Foundation of Guangxi ; Bagui Young Scholars Program ; Bagui Young Scholars Program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences ; Open Project Program of the Key Laboratory of Optical Astronomy, NAOC, CAS ; Open Project Program of the Key Laboratory of Optical Astronomy, NAOC, CAS ; NASA ; NASA ; National Key Research and Development Project of China ; National Key Research and Development Project of China ; Natural Science Foundation of Guangxi ; Natural Science Foundation of Guangxi ; Bagui Young Scholars Program ; Bagui Young Scholars Program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences ; Open Project Program of the Key Laboratory of Optical Astronomy, NAOC, CAS ; Open Project Program of the Key Laboratory of Optical Astronomy, NAOC, CAS ; NASA ; NASA ; National Key Research and Development Project of China ; National Key Research and Development Project of China ; Natural Science Foundation of Guangxi ; Natural Science Foundation of Guangxi ; Bagui Young Scholars Program ; Bagui Young Scholars Program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences ; Open Project Program of the Key Laboratory of Optical Astronomy, NAOC, CAS ; Open Project Program of the Key Laboratory of Optical Astronomy, NAOC, CAS ; NASA ; NASA ; National Key Research and Development Project of China ; National Key Research and Development Project of China ; Natural Science Foundation of Guangxi ; Natural Science Foundation of Guangxi ; Bagui Young Scholars Program ; Bagui Young Scholars Program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences ; Strategic Pioneer Program on Space Science, Chinese Academy of Sciences ; Open Project Program of the Key Laboratory of Optical Astronomy, NAOC, CAS ; Open Project Program of the Key Laboratory of Optical Astronomy, NAOC, CAS ; NASA ; NASA
源URL[http://ir.bao.ac.cn/handle/114a11/87746]  
专题中国科学院国家天文台
通讯作者Wang, J.
作者单位1.Guangxi Univ, Sch Phys Sci & Technol, Guangxi Key Lab Relativist Astrophys, Nanning 530004, Peoples R China
2.Chinese Acad Sci, Natl Astron Observ, Key Lab Space Astron & Technol, Beijing 100101, Peoples R China
3.Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing, Peoples R China
4.Univ Sci & Technol China, Dept Astron, Hefei 230026, Peoples R China
5.Nanjing Univ, Sch Astron & Space Sci, Nanjing 210023, Peoples R China
推荐引用方式
GB/T 7714		 Wang, J.,Li, H. L.,Xin, L. P.,et al. Flaring-associated Complex Dynamics in Two M Dwarfs Revealed by Fast, Time-resolved Spectroscopy[J]. ASTROPHYSICAL JOURNAL,2022,934(2):11.
APA Wang, J..,Li, H. L..,Xin, L. P..,Li, G. W..,Bai, J. Y..,...&Wei, J. Y..(2022).Flaring-associated Complex Dynamics in Two M Dwarfs Revealed by Fast, Time-resolved Spectroscopy.ASTROPHYSICAL JOURNAL,934(2),11.
MLA Wang, J.,et al."Flaring-associated Complex Dynamics in Two M Dwarfs Revealed by Fast, Time-resolved Spectroscopy".ASTROPHYSICAL JOURNAL 934.2(2022):11.

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