Poster Open Access
Giant white-light flares on fully convective stars occur at high latitudes
Ekaterina Ilin;
Katja Poppenhaeger;
Sarah Jane Schmidt;
Silva P. Järvinen;
Elisabeth R. Newton;
Julián D. Alvarado-Gómez;
J. Sebastian Pineda;
James R. A. Davenport;
Mahmoudreza Oshagh;
Ilya Ilyin
Editor(s)
Wolk, ScottIn a systematic analysis of fully convective stars observed with TESS, we detected four stars that displayed giant flares that were modulated in brightness by the stars' rapid rotation. The morphology of the modulation allowed us to directly localize these flares between 55° and 81° latitude on the stellar surface, far higher than typical solar flare latitudes.
These findings are a. evidence that strong magnetic fields tend to emerge close to the stellar rotational poles for fully convective stars, and b. suggest that the impact of flares on the habitability of exoplanets around small stars could be weaker than previously thought.
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Davenport et al. (2014), ApJ, 797, 122
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- Publication date:
- February 24, 2021
- DOI:
-
- Keyword(s):
- Very low mass stars stellar activity flares stellar rotation stellar magnetic fields low-mass stars
- Meeting:
- The 20.5th Cambridge Workshop on Cool Stars, Stellar Systems and the Sun (CS20.5), virtually anywhere, March 2-4, 2021
- Communities:
- License (for files):
- Creative Commons Attribution 4.0 International