Physics
Scientific paper
Aug 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001icrc....6.2554d&link_type=abstract
Proceedings of the 27th International Cosmic Ray Conference. 07-15 August, 2001. Hamburg, Germany. Under the auspices of the Int
Physics
Scientific paper
For different types of local stars with flarea ctivity we calculate expected gamma-ray fluxes inp eriods of flare energetic particle (FEP) generation. We suppose that main processes of FEP generation and propagation in the stellar-sphere are similar with processes in the Heliosphere but with much bigger energetic. Wec alculate the space-time-energy distribution of these particles in the stellar-sphere in the periods of FEP events. On the basis of investigations of cosmic ray nonlinearp rocesses we determine the space-time distribution ofs tellar wind matter. Then we calculate the generation ofg amma rays by decay of neutral pions generated inn uclear interactions of FEP with stellar wind matter andd etermine the expected space-time distribution of gammaray emissivity. Then we calculate the expected time variation of the angle distribution and spectra of gammar ay fluxes. For some simple diffusion models of stellarF EP propagation we obtain analytical approximation described the time evolution of gamma ray flux angled istribution as well as time evolution of gamma rays pectrum. It is shown that by observations from local stars of gamma rays generated by stellar FEP interactions withs tellar wind matter can be obtain important information ons tellar activity, on FEP spectrum, on mode of FEPp ropagation, and on matter distribution in the inner stellarsphere.
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