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Context. Periodicities have frequently been reported across many wavelengths in the solar corona. Correlated periods of ~5 min, comparable to solar p-modes, are suggestive of coupling between the photosphere and the corona.
Published by: Astronomy and Astrophysics Published on: 06/2021
YEAR: 2021   DOI: 10.1051/0004-6361/202039510
Sun: radio radiation; Sun: corona; Sun: X-rays; gamma rays; Sun: oscillations; magnetic reconnection; radiation mechanisms: non-thermal; Astrophysics - Solar and Stellar Astrophysics; Physics - Space Physics; Parker Data Used
The first self-consistent simulations of electron acceleration during magnetic reconnection in a macroscale system are presented. Consistent with solar flare observations, the spectra of energetic electrons take the form of power laws that extend more than two decades in energy. The drive mechanism for these nonthermal electrons is Fermi reflection in growing and merging magnetic flux ropes. A strong guide field suppresses the production of nonthermal electrons by weakening the Fermi drive mechanism. For a weak guide field t ...
Published by: Physical Review Letters Published on: 04/2021
YEAR: 2021   DOI: 10.1103/PhysRevLett.126.135101