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Implications of the detection of sub-PeV diffuse \\(\\gamma\\) rays from the Galactic disk apart from discrete sources
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Implications of the detection of sub-PeV diffuse \\(\\gamma\\) rays from the Galactic disk apart from discrete sources
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Implications of the detection of sub-PeV diffuse \\(\\gamma\\) rays from the Galactic disk apart from discrete sources
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Paper
Implications of the detection of sub-PeV diffuse \\(\\gamma\\) rays from the Galactic disk apart from discrete sources
2021
Overview
Very recently, the Tibet-AS\\(\\gamma\\) collaboration reported the detection of \\(\\gamma\\) rays from the galactic disk in the energy range of 100 TeV -- 1 PeV. Remarkably, many of these \\(\\gamma\\) rays were observed apart from known very high energy (E\\(>\\) 100 GeV) \\(\\gamma\\)-ray sources. These results are best understood if these diffuse \\(\\gamma\\) rays: 1) were produced by a conventional rather than an exotic (i.e. dark matter decay or annihilation) process, 2) have a hadronic rather than a leptonic origin, 3) were produced in impulsive rather than stable sources or, alternatively, in optically thick sources. In addition to that, the detection of the sub-PeV diffuse \\(\\gamma\\) rays implies a limit on the flux of neutrinos from the Galactic disk and a lower limit on the rigidity of the cutoff in the Galactic cosmic ray spectrum.
Publisher
Cornell University Library, arXiv.org
Subject
