Space Weather

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

By Keith Cowing
Status Report
May 17, 2023
Filed under , , , , , ,
Possible Detection of A Flare-associated Coronal Mass Ejection on A M-dwarf
CME mass estimated through different ways plotted against flaring bolometric energy. KIC 8093473 is marked by the two red open stars connected by a dashed line. The two points correspond the CME masses estimated by different CME dynamical length scales (see the main text for the details). The four M-dwarf flares studied in Wang et al. (2021) and Wang et al. (2022) are denoted by the magenta open squares. The stellar CME candidates complied in Moschou et al. (2019) and one studied in Argiroffi et al. (2019) are shown by the solid blue points. The solar flare-CME events studied in Yashiro & Gopalswamy (2009) are denoted by the cyan circles. The best fit to these solar events obtained in Drake et al. (2013) is presented by the dashed line. — astro-ph.SR

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.

J. Wang

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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Submission history
From: Jing Wang
[v1] Mon, 15 May 2023 01:39:03 UTC (188 KB)
Astrobiology, space weather

SpaceRef co-founder, Explorers Club Fellow, ex-NASA, Away Teams, Journalist, Space & Astrobiology, Lapsed climber.