http://arxiv.org/abs/2305.08294
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.
J. Wang
Tue, 16 May 23
15/83
Comments: 8 pages, 3 figures and 1 table. To be published in Research in Astron. Astrophys