An interpretation of the millisecond time variation in hard X-ray solar flares
Abstract
Recent observations of the fast time variability in the hard X-ray emission from solar flares are interpreted. The fast spikes are assumed to be superimposed on the thermal X-ray emission. The rise and fall of a spike are caused by disruptions in the plasma. The rise time represents the impulsive heating time and the decay or fall time represents a quick cooling of the plasma due to the accelerating growth rate of the m = 1 tearing mode. The estimated characteristic time durations of the spike are found to be in good agreement with the observed ones.
- Publication:
-
Unstable Current Systems and Plasma Instabilities in Astrophysics
- Pub Date:
- 1985
- Bibcode:
- 1985IAUS..107..299K
- Keywords:
-
- Periodic Variations;
- Solar Flares;
- Solar X-Rays;
- Spectrum Analysis;
- Temporal Distribution;
- Plasma Cooling;
- Solar Wind;
- Spectral Energy Distribution;
- Stellar Models;
- Tearing Modes (Plasmas);
- Solar Physics