Single source scenario describing the very end of the cosmic ray energy spectrum

0582177 - FZÚ 2024 RIV FR eng C - Conference Paper (international conference)
Bakalová, Alena - Vícha, Jakub - Trávníček, Petr
Single source scenario describing the very end of the cosmic ray energy spectrum.
EPJ Web of Conferences. Vol. 283. Les Ulis: E D P Science, 2023 - (De Mitri, I.; Barbato, F.; Boncioli, D.; Evoli, C.; Pagliaroli, G.; Salamida, F.), č. článku 02016. ISSN 2100-014X.
[International symposium on Ultra High Energy Cosmic Rays (UHECR) /6./. L'Aquila (IT), 03.10.2022-07.10.2022]
R&D Projects: GA MŠMT LTT18004; GA MŠMT EF16_013/0001402
Research Infrastructure: AUGER-CZ II - 90102
Institutional support: RVO:68378271
Keywords : the highest energy cosmic rays * simulations
OECD category: Particles and field physics
https://www.epj-conferences.org/articles/epjconf/pdf/2023/09/epjconf_uhecr2023_02016.pdf

The energy spectrum of cosmic rays is steeply falling with a suppression of the flux at the highest energies caused by energy losses during propagation or by reaching the maximum energy of cosmic accelerators. The energy spectrum at the highest energies is currently measured with high precision by two experiments, Telescope Array in the Northern hemisphere and the Pierre Auger Observatory in the Southern hemisphere. In this work, we study the possibility of explaining the shape of the energy spectrum above 1019.5 eV measured by the Pierre Auger Observatory with a single source. Using CRPropa 3 numerical simulations of cosmic ray propagation in the Universe we show possible features of such a single source that would be able to create a shape of the energy spectrum compatible with the measurement including limitations on the source distance, spectral index and mass composition.
Permanent Link: https://hdl.handle.net/11104/0350268