Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...258..812v&link_type=abstract
Astrophysical Journal, Part 1, vol. 258, July 15, 1982, p. 812-822.
Astronomy and Astrophysics
Astrophysics
17
Coronal Loops, Electron Acceleration, Shock Fronts, Solar Electrons, Solar Magnetic Field, Type 4 Bursts, Plasma Radiation, Propagation Velocity, Surges, Velocity Distribution, Wave Propagation
Scientific paper
It is proposed that in loop coronal transients an erupting loop moves away from the solar surface, with a velocity exceeding the local Alfven speed, pushing against the overlying magnetic fields and driving a shock in the front of the moving part of the loop. Lower hybrid waves are excited at the shock front and propagate radially toward the center of the loop with phase velocity along the magnetic field that exceeds the thermal velocity. The lower hybrid waves stochastically accelerate the tail of the electron distribution inside the loop. The manner in which the accelerated electrons are trapped in the moving loop are discussed, and their radiation signature is estimated. It is suggested that plasma radiation can explain the power observed in stationary and moving type IV bursts.
Gergely Tomas E.
Papadopoulos Konstantinos
Vlahos Loukas
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