Other
Scientific paper
May 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agusmsp51c..11m&link_type=abstract
American Geophysical Union, Spring Meeting 2008, abstract #SP51C-11
Other
7519 Flares, 7554 X-Rays, Gamma Rays, And Neutrinos
Scientific paper
We present spectral fits for RHESSI and GOES solar flare data that include both a Differential Emission Measure for thermal emission and a power law fit for nonthermal emission. This improvement over the traditional isothermal approximation for thermal flare emission is intended to help to resolve the ambiguity in the range where the thermal and nonthermal components may have similar photon fluxes. This "crossover" range can be anywhere from 10 to 30 keV for medium to large solar flares. It is also expected that the low energy cutoff of the nonthermal electron spectrum lurks in this enery range, or below, but is obscured by thermal emission. In this work we apply the process (initially presented at the 2007 SPD-AAS meeting for two solar flares and simulated data) to a large sample of GOES X and M class flares. For each flare we attempt to establish limits for the low energy cutoff of the nonthermal spectrum and the energy in nonthermal electrons. This research is supported by NASA contract NAS5-98033.
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