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Unveiling the nature of galactic TeV sources with IceCube results
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abstract
IceCube collaboration reported the first high-significance observation of the neutrino emission from the Galactic disk. The observed signal can be due to diffuse emission produced by cosmic rays interacting with interstellar gas but can also arise from a population of sources. In this paper, we evaluate both the diffuse and source contribution by taking advantage of gamma-ray observations and/or theoretical considerations. By comparing our expectations with IceCube measurement, we constrain the fraction of Galactic TeV gamma-ray sources (resolved and unresolved) with hadronic nature. In order to be compatible with the IceCube results, this fraction should be less than $\sim 40\%$ corresponding to a cumulative source flux $\Phi_{\nu, \rm s} \le 2.6 \times 10^{-10} cm^{-2}s^{-1}$ integrated in the 1-100 TeV energy range.
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Cited by 1 Pith paper
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The Galactic Neutrino Sky: Predictions from Gamma-ray Source Populations
A template of resolved and unresolved gamma-ray sources, added to an unmodified diffuse model, reproduces the shape and spectrum of IceCube's inner-Galaxy neutrino excess.
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