Journal
ASTROPHYSICAL JOURNAL
Volume 675, Issue 2, Pages 1645-1655Publisher
IOP PUBLISHING LTD
DOI: 10.1086/527044
Keywords
acceleration of particles; Sun : corona; Sun : flares; waves
Categories
Funding
- STFC [ST/F002149/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/F002149/1] Funding Source: researchfish
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The impulsive phase of a solar flare marks the epoch of rapid conversion of energy stored in the preflare coronal magnetic field. Hard X-ray observations imply that a substantial fraction of flare energy released during the impulsive phase is converted to the kinetic energy of mildly relativistic electrons (10-100 keV). The liberation of the magnetic free energy can occur as the coronal magnetic field reconfigures and relaxes following reconnection. We investigate a scenario in which products of the reconfiguration-large-scale Alfven wave pulses-transport the energy and the magnetic field changes rapidly through the corona to the lower atmosphere. This offers two possibilities for electron acceleration. First, in a coronal plasma with beta
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