Topological defects and highest energy cosmic and gamma rays |
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Authors: | G Sigl |
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Institution: | (1) Department of Astronomy & Astrophysics, Enrico Fermi Institute, The University of Chicago, 60637-1433 Chicago, IL |
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Abstract: | In this paper we review the hypothesis that a substantial part of the cosmic ray flux observed above about 1019 eV may be produced by decaying or annihilating topological defects left over from phase transitions in the early universe at grand unification energy scales ( 1016 GeV). Possible signatures of cosmic ray producing defect models are discussed which could be tested experimentally in the near future. We thereby focus on model independent universal spectral properties of the predicted particle fluxes. |
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Keywords: | highest energy -rays" target="_blank">gif" alt="gamma" align="MIDDLE" BORDER="0">-rays topological defects cosmic strings |
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