X-Ray, Radio and SEP Observations of Relativistic Gamma-Ray Events
Bernd Heber; Clarisse Hamadache; Eino Valtonen; Jürgen Kiener; Karl-Ludwig Klein; Kostas Tziotziou; Nicole Vilmer; Olga E. Malandraki; Pietro Zucca
https://urn.fi/URN:NBN:fi-fe2021042720266
Tiivistelmä
The rather frequent occurrence, and sometimes long duration, of -
ray events at photon energies above 100 MeV challenges our understanding of
particle acceleration processes at the Sun. The emission is ascribed to pion-decay
photons due to protons with energies above 300 MeV.We study the X-ray and radio
emissions and the solar energetic particles (SEPs) in space for a set of 25 Fermi
-ray events. They are accompanied by strong SEP events, including, in most cases
where the parent activity is well-connected, protons above 300 MeV. Signatures of
energetic electron acceleration in the corona accompany the impulsive and early
post-impulsive -ray emission. -ray emission lasting several hours accompanies
in general the decay phase of long-lasting soft X-ray bursts and decametric-tokilometric
type II bursts. We discuss the impact of these results on the origin of
the -ray events.
Kokoelmat
- Rinnakkaistallenteet [19207]