Possible Detection of a Flare-associated Coronal Mass Ejection on an M-dwarf  

作　　者：J.Wang 

机构地区：[1]Guangxi Key Laboratory for Relativistic Astrophysics,School of Physical Science and Technology,Guangxi University,Nanning 530004,China [2]Key Laboratory of Space Astronomy and Technology,National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100101,China

出　　处：《Research in Astronomy and Astrophysics》2023年第9期207-212,共6页天文和天体物理学研究（英文版）

基　　金：support from the National Key Research and Development Project of China (grant 2020YFE0202100);supported by the National Natural Science Foundation of China (NSFC, grant No. 12173009);by the Strategic Pioneer Program on Space Science, Chinese Academy of Sciences, grants XDA15052600 and XDA15016500;supported by the Natural Science Foundation of Guangxi (2020GXNSFDA238018);by the Bagui Young Scholars Program.

摘　　要：We here report a probable detection of a stellar coronal mass ejection(CME)in active M dwarf KIC 8093473 by performing an analysis on its time resolved X-ray spectra observed by the XMM-Newton satellite.Compared to the value at the quiescent state and the interstellar one,our spectral modeling returns a marginal(and probably evolving)excess of hydrogen column density in the flare state at a significance level of 1σ,which can be understood by an additional absorption due to a flare-associate CME.The CME mass is then estimated to be∼7×10^(18)–2×10^(20)g according to the ice cream cone model.

关 键 词：STARS coronae-stars flare-stars late-type-X-rays STARS 

分 类 号：P182.62[天文地球—天文学] V476.4[航空宇航科学与技术—飞行器设计]