Gamma-ray bursts, ultra-high-energy cosmic rays, and cosmic gamma-ray background |
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Authors: | Tomonori Totani |
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Affiliation: | Department of Physics, School of Science, The University of Tokyo, Tokyo 113-0033, Japan |
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Abstract: | We argue that gamma-ray bursts (GRBs) may be the origin of the cosmic gamma-ray background radiation observed in the GeV range. It has theoretically been discussed that protons may carry a much larger amount of energy than electrons in GRBs, and this large energy can be radiated in the TeV range by synchrotron radiation of ultra-high-energy protons ( 1020 eV). The possible detection of GRBs above 10 TeV suggested by the Tibet and HEGRA groups also supports this idea. If this is the case, most of TeV gamma-rays from GRBs are absorbed in intergalactic fields and eventually form GeV gamma-ray background, whose flux is in good agreement with the recent observation. |
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Keywords: | PACS classification codes: 95.85.Pw 98.70.Rz 98.70.Sa |
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