Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...365..354s&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 365, Dec. 10, 1990, p. 354-364.
Astronomy and Astrophysics
Astrophysics
15
Energetic Particles, Implosions, Magnetohydrodynamics, Particle Acceleration, Solar Flares, Electromagnetic Fields, Solar Corpuscular Radiation, Solar Electrons, Solar Protons
Scientific paper
A model for high-energy solar flares is presented to explain prompt proton and electron acceleration within 1 sec to relativistic energies. The three-dimensional X-type current loop coalescence, where two crossed flux tubes interact in one point, is a fundamemtally new process as compared to the one- and two-dimensional cases studied earlier. It is shown that the strong implosion can be driven by the magnetic pinch in the region where two current loops interact. The strong inductive electric field can be excited during the implosion. A test-particle orbit under the EM fields derived from the MHD equations is studied. It is also shown that both protons and electrons can be promptly accelerated to about 100 GeV and 100 MeV, respectively.
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