Physics
Scientific paper
Jul 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003icrc....6.3515s&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
1
Scientific paper
The solar flares of 1991 June 11 and 15 are famous for their prolonged γ -emission with a significant contribution from π 0 -decay, which provides a unique evidence that relativistic solar protons can exist in the solar corona for hours. The model of diffusion propagation assuming prolonged and multiple injection fits quite well time profiles of about 100 MeV protons aboard GOES-7 during first 20 hours of these events. Source functions on the Sun required to fit the proton data are in a qualitative agreement with the observed solar γ -emission. The number of protons in the solar source is estimated for different time moments by using the propagation model. For the 15 July 1991 event the number of protons interacting in the solar atmosphere and escaping into the interplanetary space quantitatively agree well with each other, i.e. they are likely of the same population.
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