SMuK 2023 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 144: Cosmic Ray VII

T 144.5: Vortrag

Donnerstag, 23. März 2023, 18:30–18:45, POT/0013

Stochastic modelling of cosmic ray sources for diffuse high-energy neutrinos — •Anton Stall and Philipp Mertsch — Institute for Theoretical Particle Physics and Cosmology (TTK), RWTH Aachen University, Aachen, Germany

Cosmic rays of energies up to a few PeV are believed to be of Galactic origin, yet individual sources have still not been firmly identified. Due to inelastic collisions with the interstellar gas, cosmic-ray nuclei produce a diffuse flux of high-energy gamma-rays and neutrinos. Fermi-LAT has provided maps of galactic gamma-rays at GeV energies which can be produced by both hadronic and leptonic processes. Neutrinos, on the other hand, are exclusively produced by the sought-after hadronic processes, yet they can be detected above backgrounds only at hundreds of TeV. To predict diffuse emission at these high energies, one can extrapolate from the GeV maps, but it is an open question to what extend this is justified. It can be expected that the consideration of individual cosmic-ray sources instead of a smooth density limits the correlation of the maps at TeV energies compared to the ones at GeV energies. Such a modelling of sources should be done stochastically. In a first step, we investigate the modelling of multiple point sources and the extension to a stochastic model.