Starburst Galaxies as possible sources of UHECRs and neutrinos

Discussion timeslot (ZOOM-Meeting): 21. July 2021 - 12:00
ZOOM-Meeting URL: https://desy.zoom.us/j/91896950007
ZOOM-Meeting ID: 91896950007
ZOOM-Meeting Passcode: ICRC2021
Corresponding Session: https://icrc2021-venue.desy.de/channel/24-Ground-based-measurements-of-low-energy-GCRs-SH/98
Live-Stream URL: https://icrc2021-venue.desy.de/livestream/Discussion-06/7

Abstract:
'The coexistence of powerful accelerators of cosmic rays with intense background radiation fields creates unique conditions in astrophysical sources, where the Ultra-High-Energy-Cosmic-Rays (UHECRs) interactions could take place copiously and produce several secondary particles. rnIn particular, such phenomena could explain the features observed in the UHECR spectrum measurements. rnWe explore this scenario extending SimProp, a simulation code for UHECR extra-galactic propagation, allowing us to compute the interactions inside and outside the source. rnInspired by recent results on the anisotropy in the arrival directions of the highest energy cosmic-rays, we perform our simulations in the context of Starburst Galaxies, one of the most promising candidate sources. rnWe model the interactive and diffusive processes in the region surrounding the Starburst Nucleus, taking into account interactions with background photons and the interstellar medium. The escaping cosmic-ray flux is then propagated to the Earth and compared with the experimental spectrum and composition measured by the Pierre Auger Observatory.rnThe proposed method could be used to connect the features of the UHECR spectrum and composition at Earth to the parameters describing Starburst Galaxies. rnIn addition, neutrinos directly produced in these sources can be compared with the measured IceCube flux, thus providing an additional way to constrain some source parameters.'

Authors: Antonio Condorelli | Denise Boncioli | Enrico Peretti | Sergio Petrera
Indico-ID: 899
Proceeding URL: https://pos.sissa.it/395/959