Physics
Scientific paper
Aug 1957
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1957phrv..107..830p&link_type=abstract
Physical Review, vol. 107, Issue 3, pp. 830-836
Physics
76
Scientific paper
It is shown that the white-light cosmic-ray solar flare of February 23, 1956 expended of the order of 2×1032 ergs of energy, or 104 ergs/cm3. The energy apparently came from a 500-gauss force-free magnetic field initially occupying the site of the flare. It is shown that the 500-gauss field, besides supplying the flare energy, will produce fluid motions of sufficient velocity to accelerate ions from thermal to relativistic energies by Fermi's mechanism in about 2 minutes. The theoretical energy spectrum of the model is in agreement with the observed spectrum. About one percent of the total flare energy is converted to relativistic particles and the remainder is dissipated through thermal processes to produce the observed optical radiation.
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