Magnetic activity in very stable stellar magnetic fields
Vida Krisztián
MTA CSFK CSI


The fast-rotating single M4 dwarf V374 Peg is a well-known laboratory for studying intense stellar activity in a stable magnetic topology. As an observable proxy for the stellar magnetic field, we studied the stability of the light curve, and thus the spot configuration. The light curve suggests a spot configuration that is stable over about 16 years, confirming the previous indications of a very stable magnetic field. Spectral data indicates flares and a complex CME with falling-back and re-ejected material, with a maximal projected velocity of ~675km/s.