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T: Fachverband Teilchenphysik

T 62: Neutrino-Astronomie II

T 62.10: Vortrag

Mittwoch, 27. März 2019, 18:20–18:35, S14

Predictions for the flux of high-energy cosmogenic neutrinos* — •David Wittkowski and Karl-Heinz Kampert — Bergische Universität Wuppertal, Gaußstraße 20, 42119 Wuppertal

The origin and properties of the sources of ultra-high energy cosmic rays (UHECR, charged nuclei with energies E>1  EeV) are still among the most important issues in astroparticle physics. A promising way to solve these issues is offered by multi-messenger approaches. When they propagate through the universe, UHECR interact with cosmic background photons generating the so-called cosmogenic neutrinos. Since they are not affected by cosmic magnetic fields or energy losses due to interactions with the cosmic background photons, cosmogenic neutrinos can provide additional and independent information about the sources of UHECR. In this talk, we present predictions for the so far unmeasured flux of high-energy cosmogenic neutrinos. These predictions are consistent with recent upper limits for the neutrino flux from large-scale cosmic-ray experiments and based on four-dimensional simulations that take the extragalactic magnetic field into account. The corresponding simulation results for the flux of UHECR are in good agreement with data from the Pierre Auger Observatory. Our predictions are important for the design of future neutrino observatories, since they allow to assess what detector volume and detection time are needed to measure the flux of high-energy cosmogenic neutrinos.

*Gefördert durch die BMBF Verbundforschung Astroteilchenphysik (Vorhaben 05A17PX1).