Physics
Scientific paper
Oct 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000spd....31.0248m&link_type=abstract
American Astronomical Society, SPD Meeting #31, #02.48; Bulletin of the American Astronomical Society, Vol. 32, p.1291
Physics
Scientific paper
We present a unified spatially-dependent model for simultaneous ion and electron acceleration in impulsive solar flares. In this model, both particle species are stochastically accelerated out of the thermal distribution and then to relativistic energies via resonance with cascading low-amplitude MHD Alfven and fast mode waves. The coupled and nonlinear wave and particle evolution are treated with a quasilinear simulation, which takes into account additional relevant physical processes such as Coulomb collisions, particle transport and escape, wave transport, and the replenishment of the solar flare acceleration region by a cospatial return current. We demonstrate how electron and ion fluxes consistent with those from a large impulsive event are readily obtained in this acceleration scenario, and consider the spatial dependence of the electron and ion energy-differential distributions. We conclude with the implications for the spatial dependence of the hard X-ray emission. Funded by NASA SEC Solar Physics grant NAG5-8480.
Mariska John
Miller Aaron J.
Newton Elizabeth K.
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