Quasi periodic pulsations in stellar flares
Abstract
Quasi-periodic pulsations (QPPs) are frequently observed in the decaying section of a solar flare. These are visible over a wide range of wavelengths and may provide information regarding the physical conditions of the flare. The timescale of QPPs range widely from a fraction of a second to many minutes, but the mechanism(s) which generates these pulsations is poorly understood. Although solar QPPs have been studied for many years, very little is known about QPPs associated with stellar flares because these are unusual events and the oscillations have relatively short lifetimes. The advent of space missions has opened up new possibilities for the study of stellar QPPs. We summarize what is currently known about stellar QPPs and present new results in the optical obtained from the Kepler satellite and in the UV from GALEX.
- Publication:
-
40th COSPAR Scientific Assembly
- Pub Date:
- 2014
- Bibcode:
- 2014cosp...40E.200B