Energetic particle interactions in the universe: consequences for cosmic ray, gamma ray and neutrino astrophysics

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Energetic particle interactions in the universe: consequences for cosmic ray, gamma ray and neutrino astrophysics. The most energetic phenomena in the Universe will be explored with giant cosmic ray, neutrino and gamma ray telescopes. Particles accelerated or produced in astrophysical sources interact in their magnetic, matter and radiation environment, making cosmic rays, gamma rays and neutrinos. Subsequently, interactions in space as they travel to Earth change what we see. With theoretical work proposed in this project we aim to determine where in the Universe the highest energy cosmic rays originate, and the fundamental processes responsible for them. It will also lead to a greater understanding of how active galaxies and other astrophysical objects function.