Astronomy and Astrophysics – Astrophysics
Scientific paper
1995-03-02
Space Sci.Rev.75:375-385,1996
Astronomy and Astrophysics
Astrophysics
11 pages of uuencoded compressed postscript, including 3 figures, to be published in Space Science Reviews.
Scientific paper
10.1007/BF00195046
In this paper we review the hypothesis that a considerable part of the cosmic ray flux observed above about $10^{19}\eV$ may be produced by decaying or annihilating topological defects left over from phase transitions in the early universe at grand unification energy scales ($\approx10^{16}\GeV$). 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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