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- W2011619018 abstract "New data on dynamic phenomena in the solar corona create new outstanding questions for the theory of cosmic plasma. Reconnection plays a key role in conversion of the so-called ‘free magnetic energy’ to kinetic and thermal energies of the plasma, to hard electromagnetic radiation and accelerated particles. These effects occur in the solar atmosphere and manifest themselves as flares and flare-like events, coronal transients and mass ejections. Some new results of reconnection theory are reviewed, and new problems are pointed out. The most important of them is magnetic reconnection of electric currents in the corona. This effect can be significant, for example, in active regions with observed large shear but it is not studied well yet. In order to explain the acceleration of protons and heavier ions up to several GeV in a time of < 0.1 s, the transverse electric field outside the reconnecting current sheet must be taken into account. The transverse electric field efficiently can ‘lock’ nonthermal ions in the current sheet, thus allowing their acceleration by the direct electric field. Evolutionarity and stability of reconnecting current sheets are not investigated yet either. Another phenomenon, which can play a role in dynamics of coronal plasma, is electromagnetic expulsion, different from Parker's well-known magnetic buoyancy. This force is induced by the presence of plasma regions with considerably different conductivity in the corona." @default.
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- W2011619018 date "1996-01-01" @default.
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- W2011619018 title "Theoretical perspectives on the study of coronal dynamic phenomena" @default.
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- W2011619018 doi "https://doi.org/10.1016/0273-1177(95)00579-4" @default.
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