Cosmic Rays from Pair-Instability Supernova Remnants
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- Institutt for fysikk 
Pair-instability supernovae are the most energetic thermonuclear explosions in theUniverse, up to 100 times more energetic than type Ia supernovae. Around redshiftz > 6 approximately one out of ten supernovae was a pair-instability supernova, inthe local universe, however, this number is drastically reduced to less than one outof ten thousand. In this thesis we look at progenitors both among the first generationof stars and in the local universe. We determine the dynamical evolution of thesupernova blast wave propagating through the interstellar medium. The maximumenergy a cosmic ray proton can be accelerated to in the supernova remnant is thenfound to be 4e15 eV, for a mean magnetic field of 100 μG parallel to the shockfront. Lastly, the proton and neutrino flux for a Pop III pair-instability supernovais estimated. The diffuse neutrino flux for PI SNe is found to be a sub-dominantcontribution to the observed flux.