Physics
Scientific paper
Sep 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987soph..107..283t&link_type=abstract
Solar Physics (ISSN 0038-0938), vol. 107, no. 2, 1987, p. 283-297.
Physics
8
Coronal Loops, Digital Simulation, Electric Fields, Force-Free Magnetic Fields, Particle Acceleration, Solar Prominences, Current Density, Decay, Electric Current, Electron Plasma, Solar Flares
Scientific paper
Numerical simulation for the dynamics of a coronal filamentary magnetic loop has been made under the assumption that the field is initially force-free and an electric resistivity suddenly increases at a given moment due to an appearance of ion sound waves, which can be excited due to a high current density if a characteristic radius r0 of the magnetic loop is about 3 km or less in a magnetic field B0 of 1000 G. During the resistive decay of the magnetic field a strong field-aligned electric field is created and maintained for a sufficient time to accelerate both electrons and protons to a high energy, which is proportional to B0/r0 and can be 100 MeV if r0 = 10 km and B0 = 1000 G. If the coronal magnetic tube is composed of many such filamentary loops, the total number of accelerated electrons is consistent with the observations.
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