Possible Detection of a Flare-associated Coronal Mass Ejection on an M-dwarf
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 the XMM-Newton satellite. Compared to the value at the 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.
- Publication:
-
Research in Astronomy and Astrophysics
- Pub Date:
- September 2023
- DOI:
- 10.1088/1674-4527/acd590
- arXiv:
- arXiv:2305.08294
- Bibcode:
- 2023RAA....23i5019W
- Keywords:
-
- stars: coronae;
- stars: flare;
- stars: late-type;
- X-rays: stars;
- Astrophysics - Solar and Stellar Astrophysics
- E-Print:
- 8 pages, 3 figures and 1 table. To be published in Research in Astron. Astrophys