Astronomy and Astrophysics – Astrophysics
Scientific paper
2003-11-13
Astrophys.J. 599 (2003) 1426-1433
Astronomy and Astrophysics
Astrophysics
19 pages, 3 figures, accepted for publication in ApJ
Scientific paper
10.1086/379317
Energetic particles that undergo strong pitch-angle scattering and diffuse through a plasma containing strong compressible MHD turbulence undergo diffusion in momentum space with diffusion coefficient Dp. In this paper, the contribution of slow modes to Dp is calculated assuming the rms turbulent velocity is of order the Alfven speed. The energy spectrum of accelerated particles is derived assuming slow modes make the dominant contribution to Dp, taking into account Coulomb losses and particle escape from the acceleration region with an energy-independent escape time. The results are applied to solar flares.
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