期刊
ASTROPHYSICAL JOURNAL
卷 675, 期 2, 页码 1645-1655出版社
IOP PUBLISHING LTD
DOI: 10.1086/527044
关键词
acceleration of particles; Sun : corona; Sun : flares; waves
资金
- STFC [ST/F002149/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/F002149/1] Funding Source: researchfish
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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