Particle acceleration by strong turbulence in solar flares: Theory of spectrum evolution

Document Type

Article

Publication Date

1-1-2009

Abstract

We propose a nonlinear self-consistent model of the turbulent nonresonant particle acceleration in solar flares. We simulate temporal evolution of the spectra of charged particles accelerated by strong long-wavelength MHD turbulence taking into account the back-reaction of the accelerated particles on the turbulence. The main finding is that the nonlinear coupling of accelerated particles with MHD turbulence results in prominent evolution of the spectra of accelerated particles, which can be either soft-hard-soft or soft-hard-harder depending on the particle injection efficiency. Such evolution patterns are widely observed in hard X-ray and gamma-ray emission from solar flares. © 2009. The American Astronomical Society. All rights reserved.

Identifier

64849091629 (Scopus)

Publication Title

Astrophysical Journal

External Full Text Location

https://doi.org/10.1088/0004-637X/692/1/L45

e-ISSN

15384357

ISSN

0004637X

First Page

L45

Last Page

L49

Issue

1

Volume

692

Grant

0607544

Fund Ref

National Science Foundation

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