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Résumé |
The era of neutrino astronomy has begun. After decades of detector improvement, IceCube recently discovered neutrinos of astrophysical origin. Energies between 30 TeV and 2 PeV make them the most energetic neutrinos detected. However, their sources remain a mystery: multi-messenger arguments and the lack of correlation with potential, promising source classes, such as blazars and gamma-ray bursts, hint at a non-trivial resolution of this pressing question. I will show how neutrino telescopes detect high-energy astrophysical neutrinos, how observables such as spectral shape and neutrino flavor are inferred, and what are the current status and near-future prospects of the field. I will also touch upon the next frontier in neutrino astrophysics: the detection of cosmogenic, or GZK neutrinos, with EeV energies, created in the interaction of ultra-high-energy cosmic rays and cosmological photon backgrounds. |
