SMuK 2023 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 41: Cosmic Ray II
T 41.6: Vortrag
Dienstag, 21. März 2023, 18:15–18:30, POT/0013
Numerical investigation of bursting sources as potential accelerators of ultra-high-energy cosmic rays — •Leander Schlegel1,2, Julia Becker Tjus1,2, and Marcel Schroller1,2 — 1Theoretische Physik IV, Ruhr Universität Bochum, Bochum, Germany — 2RAPP-Center at Ruhr Universität Bochum, Bochum, Germany
Since their discovery over a century ago, the origin of cosmic rays of the highest energies is still widely uncertain. While the observed constant flux suggests at first sight to analyze primarily steady state source models, the needed magnetic luminosities for potential sources seem to favor bursting sources, that appear in quiescent and flaring states, like the class of Active Galactic Nuclei (AGN). The goal of this work is trying to understand the detailed behaviour of bursting sources and their possible contribution to the UHECR flux, by simulating the time resolved propagation of a plasma blob inside the jet of an AGN and accounting for a temporal variability of the source. For this purpose, a tool for cosmic-ray propagation in relativistic plasmoids of AGN jets implemented into the open-source code CRPropa 3.1, is further improved. With this framework, we will predict the multimessenger signatures of flaring sources that are active for certain intervals in time, representing a flaring behaviour. With this investigation we aim to help providing a numerical AGN model, that can finally be tested against other source models by fitting to observed UHECR data.