- Press Release
- May 26, 2023
Possible Detection of A Flare-associated Coronal Mass Ejection on A M-dwarf
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 1σ, which can be understood by an additional absorption due to a flare-associate CME.
The CME mass is then estimated to be ∼7×1018−2×1020 g according to the ice cream cone model.
Comments: 8 pages, 3 figures and 1 table. To be published in Research in Astron. Astrophys
Subjects: Solar and Stellar Astrophysics (astro-ph.SR)
Cite as: arXiv:2305.08294 [astro-ph.SR] (or arXiv:2305.08294v1 [astro-ph.SR] for this version)
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From: Jing Wang
[v1] Mon, 15 May 2023 01:39:03 UTC (188 KB)
Astrobiology, space weather