The coronae of Kepler superflare stars
Abstract
Kepler has revealed a population of apparently solar-like, slowly rotating G-type stars showing enormous white-light flares, which release energies exceeding that of known solar flares by many orders of magnitude. The existence of such extreme releases of magnetic energy on seemingly innocuous suns raises the question whether also the coronal properties of these stars are somehow exceptional and, ultimately, whether even the Sun itself may produce superflares at some point. We present XMM-Newton X-ray observations of a sample of Kepler superflare stars. These allow us to obtain a snapshot of their coronal properties and to study their relation to the coronae of normal stars and the Sun.
- Publication:
-
The X-ray Universe 2017
- Pub Date:
- October 2017
- Bibcode:
- 2017xru..conf..260C