ǂThe ǂUHECR-FR0 radio galaxy connection

ǂa ǂmulti-messenger study of energy spectra/composition emission and intergalactic magnetic field propagation

J. P. Lundquist (Author), Lukas Merten (Author), Serguei Vorobiov (Author), Margot Boughelilba (Author), Anita Reimer (Author), Paolo Da Vela (Author), Fabrizio Tavecchio (Author), Giacomo Bonnoli (Author), Chiara Righi (Author)

Abstract

This study investigates low luminosity Fanaroff-Riley Type 0 (FR0) radio galaxies as a potentially significant source of ultra-high energy cosmic rays (UHECRs). Due to their much higher prevalence in the local universe compared to more powerful radio galaxies (about five times more than FR-1s), FR0s may provide a substantial fraction of the total UHECR energy density. To determine the nucleon composition and energy spectrum of UHECRs emitted by FR0 sources, simulation results from CRPropa3 are fit to Pierre Auger Observatory data. The resulting emission spectral indices, rigidity cutoffs, and nucleon fractions are compared to recent Auger results. The FR0 simulations include the approximately isotropic distribution of FR0 galaxies and various intergalactic magnetic field configurations (including random and structured fields) and predict the fluxes of secondary photons and neutrinos produced during UHECR propagation through cosmic photon backgrounds. This comprehensive simulation allows for investigating the properties of the FR0 sources using observational multi-messenger data.

Keywords

ultra-high energy cosmic rays;UHECR propagation;CRPropa;active galactic nuclei;jetted AGN;FR0 radio galaxies;Pierre Auger Observatory;UHECR energy spectrum;

Data

Language:	English
Year of publishing:	2023
Typology:	1.08 - Published Scientific Conference Contribution
Organization:	UNG - University of Nova Gorica
UDC:	539.1
COBISS:	162203907
ISSN:	1824-8039
Views:	605
Downloads:	4
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