Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...224..259s&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 224, no. 1-2, Oct. 1989, p. 259-266.
Astronomy and Astrophysics
Astronomy
9
Gamma Ray Astronomy, Particle Acceleration, Solar Flares, Solar Protons, Stochastic Processes, Approximation, Roots Of Equations, Transport Theory
Scientific paper
A model for the stochastic proton acceleration in solar flares with solutions valid for all energies is presented. A comparison with measured proton spectra supplies excellent agreement for shock dominated events and deviations in the nonrelativistic range for spectra of curved shape in contradiction to the conclusions of McGuire and v. Rosenvinge 1984, who used exclusively the non- and ultrarelativistic approximation. The deviations are discussed in detail with regard to a more accurate consideration of the spatial conditions. In the case of a constant escape time we obtain a theoretical spectrum that can be used for calculating the gamma ray radiation with energies greater than 10 MeV, reproducing the data in the transrelativistic region, where the relevant cross sections of the radiation producing processes are maximal.
Schlickeiser Reinhard
Steinacker Juergen
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