Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006spd....37.2802g&link_type=abstract
American Astronomical Society, SPD meeting #37, #28.02; Bulletin of the American Astronomical Society, Vol. 38, p.254
Astronomy and Astrophysics
Astronomy
Scientific paper
Acceleration of charged particles in a plasma by means of stochastic interactions with turbulent waves is very efficient and therefore is often invoked as the key mechanism acting in solar flare electron acceleration. We compare the photon spectra produced by electrons accelerated using the Transit Time Damping (TTD) mechanism with the detailed hard X-ray observations provided by RHESSI for looptop sources, showing the soft-hard-soft behavior in the spectral evolution. The TTD model with a simple leaky box escape term shows the observed correlation between the photon spectral index and flux but requires too large variations in photon flux over the range of observed spectral indices. We discuss more realistic models and further modifications needed to reproduce the RHESSI observations.
Benz Arnold O.
Grigis Paolo C.
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