Acceleration of Energetic Particles by Shock Waves from Large Solar Flares
Abstract
Time-intensity profiles for solar proton events are analyzed with respect to the acceleration of energetic particles from the ambient solar wind by an interplanetary shock. The time-intensity profiles are derived from the Helio 1 particle data base for 1974 to 1984. It is found that many of the large proton events display a prolonged plateau. The Fe/O abundances in the large proton events are studied. It is observed that initially the Fe/O ratio is high (about 1.0), but after proton intensities increase to about 100 protons/sq cm sr sec MeV the Fe/O ratio decreases to a value near 0.1.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- August 1990
- DOI:
- 10.1086/185780
- Bibcode:
- 1990ApJ...358L..63R
- Keywords:
-
- Particle Acceleration;
- Shock Wave Interaction;
- Solar Flares;
- Solar Planetary Interactions;
- Heavy Elements;
- Mass Distribution;
- Solar Protons;
- Solar Physics;
- PARTICLE ACCELERATION;
- SHOCK WAVES;
- SUN: ABUNDANCES;
- SUN: FLARES;
- SUN: SOLAR WIND