Karlsruhe 2024 – scientific programme
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T: Fachverband Teilchenphysik
T 66: Neutrino astronomy 3
T 66.3: Talk
Wednesday, March 6, 2024, 16:30–16:45, Geb. 30.23: 6/1
Numerical Investigation of Bursting Sources as Potential Accelerators of Ultra-High-Energy Cosmic Rays* — •Leander Schlegel1,2, Julia Becker Tjus1,2,3, and Marcel Schroller1,2 — 1Theoretical Physics IV, Plasma Astroparticle Physics, Faculty for Physics and Astronomy, Ruhr University Bochum, 44780 Bochum, Germany — 2Ruhr Astroparticle and Plasma Physics Center (RAPP Center), Germany — 3Department of Space, Earth and Environment, Chalmers University of Technology, 412 96 Gothenburg, Sweden
Since their discovery over a century ago, the origin of cosmic rays (CR) of the highest energies is still widely uncertain. A promising class of source candidates are Active Galactic Nuclei (AGN), whose subclass of blazars shows strong temporal variability as they appear in quiescent and flaring states. The goal of this work is trying to understand the detailed behaviour of these bursting sources and their possible contribution to the ultra-high-energy CR flux, by numerically simulating the time resolved propagation of a relativistic plasmoid inside the jet of an AGN. In foregoing work, a tool for cosmic-ray propagation and interaction in these local environments was implemented into the open-source code CRPropa, that is now further improved and applied. During this work, contributions could also be made to the development of CRPropa 3.2. With our framework, we apply the model to observed data of bursting sources, aiming to fit both their spectrum and light curve and try to predict their multi-messenger signatures, in order to get a more detailed understanding of this source class. *Supported by DFG (MICRO and SFB 1491)
Keywords: Cosmic Rays; Neutrinos; Multimessenger; AGN; Bursting