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Particle Acceleration and Kinematics in Solar Flares and the Solar Corona'' (Invited Review) View all abstracts by submitter

Markus J Aschwanden   Submitted: 1999-10-06 21:04

          and the Solar Corona'' (Invited Review)We review theoretical models of particle acceleration applied to solar flares (DC electric fields, wave-turbulence stochastic acceleration, shock acceleration acceleration) and confront these models with new observational findings from the {sl Compton Gamma Ray Observatory (CGRO), Solar Maximum Mission (SMM), Yohkoh}, and radio observations. Remote sensing of energetic particles via hard X-ray bremsstrahlung, gyrosynchrotron emission, and beam-driven plasma emission requi- requires a self-consistent modeling of the particle kinematics in the solar flare plasma, including acceleration, injection, propagation, trapping, and energy loss of the particles. New insights in these kinematic processes have been obtained, besides modeling of energetic particle spectra, increasingly from sub-second timing studies, e.g. in the context of Masuda's discovery of above-the-loop-top hard X-ray sources, from electron time-of-flight delay measurements, from the relative timing of propagation to magnetically conjugate footpoints, from the relative timing of particle signatures in interacting flare loops with quadrupolar geometry, and from the relative timing of gyrosynchrotron emission and hard X-ray signatures in magnetic traps. We anticipate significant progress to be made with the {sl High Energy Solar Spectroscopic Imager (HESSI)}, to be launched in 2000.           ``Magnetic Fields and Solar Processes'', Florence, Italy,          12-18 Sept 1999, ESA SP-448, Dec 1999, in press.

Authors: Aschwanden,M.J.
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Publication Status: in Proc. of the Ninth European Meeting on Solar Physics,
Last Modified: 1999-10-06 21:04
Go to main E-Print page  Tangential field changes in the great flare of May 24, 1990
  Radio and Hard X-Ray Observations of Flares and their Physical Interpretation'', (Invited Review)
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