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

J. Wang

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

Solar and Stellar Astrophysics 2023-05-16 v1

Authors: J. Wang

Abstract

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.

Keywords

coronal mass ejections stellar outbursts and variable stars

Cite

@article{arxiv.2305.08294,
  title  = {Possible Detection of A Flare-associated Coronal Mass Ejection on A M-dwarf},
  author = {J. Wang},
  journal= {arXiv preprint arXiv:2305.08294},
  year   = {2023}
}

Comments

8 pages, 3 figures and 1 table. To be published in Research in Astron. Astrophys

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