Low-luminosity active galactic nuclei as cosmic-ray sources
Anita Reimer (University of Innsbruck)
Tuesday 31/03/2026 @ 14:00, Sala Antonio Sollima (IV piano Battiferro)
The detection of cosmic gamma rays, high-energy neutrinos and cosmic rays (CRs) signal the existence of environments in the Universe that allow particle acceleration to extremely high energies. These observable signatures from putative CR sources are the result of in-source acceleration of particles, their energy and time-dependent transport including interactions in an evolving source environment, their escape and propagation to Earth. Although the nature and origin of the extragalactic CRs is not very well understood so far, recent Auger-based multipole measurements are in line with rather abundant source populations as the origin of the extragalactic CR-flux. Low-luminosity active galactic nuclei (LLAGN) jets constitute the most numerous persistent jet source population in the local Universe within the UHECR-horizon. In this talk I will focus on a few key aspects of LLAGN as CR-sources. I will also introduce CR-ENTREES, a fully time-dependent CR particle and photon propagation framework which allows for evolving source environments.