Physics
Scientific paper
Jul 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003icrc....6.3347n&link_type=abstract
Proceedings of the 28th International Cosmic Ray Conference. July 31-August 7, 2003. Trukuba, Japan. Under the auspices of the I
Physics
Scientific paper
We investigate particle acceleration in solar flares, which may be attributed to radio, hard X-ray and γ -ray emissions during their impulsive phase. The magneto-hydro dynamics picture utilizing magnetic reconnection, in which the fast shock is naturally formed. Such fast shock must be efficient accelerator of electrons and protons by first-order Fermi acceleration because the shock has oblique magnetic configuration where the enhancement of the shock acceleration is suggested and the acceleration region is sandwiched by slow shock which reflects the particles. We simulate the particle acceleration using Monte-Carlo method under test particle approximation and find that the particles are accelerated to power-law distribution. The resultant spectral index is sensitive to angle between the magnetic field and the shock normal and to compression ratio of the fast shock.
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