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Possible Detection of A Flare-associated Coronal Mass Ejection on A M-dwarf
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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 XMM-Newton satellite. Compared to the value at 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 1$\sigma$, which can be understood by an additional absorption due to a flare-associate CME. The CME mass is then estimated to be $\sim7\times10^{18}-2\times10^{20}$ g according to the ice cream cone model.
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