Effects of extragalactic magnetic field on the spectra of ultra-high-energy cosmic rays from jetted sources

Abstract

The origins and acceleration mechanisms of ultra-high-energy cosmic rays (UHECRs) are unknown. Many models attribute their extreme energies to powerful astrophysical jets. Understanding whether jet geometry -- specifically the opening angle and its orientation relative to Earth -- affects observational signatures is crucial for interpreting UHECR data. In this work, we perform numerical simulations of UHECR propagation in a magnetized universe to investigate the spectral signatures of jetted and nonjetted astrophysical sources. We demonstrate, for the first time, that under certain conditions, emission geometry can play a decisive role in shaping the observed spectrum of individual UHECR sources. These findings provide new insights into the conditions necessary for detecting UHECRs from jets, and highlight how the interplay between emission geometry and magnetic fields influences observed energy spectra.

16 pages, 12 figures

References in corpus (25)

• A radio ridge connecting two galaxy clusters in a filament of the cosmic web
• Progress on Cosmological Magnetic Fields
• Simulations of extragalactic magnetic fields and of their observables
• The intracluster magnetic field power spectrum in Abell 2382
• A new view on Auger data and cosmogenic neutrinos in light of different nuclear disintegration and air-shower models
• CRPropa 3.2 -- an advanced framework for high-energy particle propagation in extragalactic and galactic spaces
• Discovery of Magnetic Fields Along Stacked Cosmic Filaments as Revealed by Radio and X-Ray Emission
• Arrival Directions of Cosmic Rays above 32 EeV from Phase One of the Pierre Auger Observatory
• Simulations of ultra-high Energy Cosmic Rays in the local Universe and the origin of Cosmic Magnetic Fields
• The Coherent Magnetic Field of the Milky Way
• New constraints on the magnetization of the cosmic web using LOFAR Faraday rotation observations
• The Gamma-Ray Window to Intergalactic Magnetism
• Magnetic field strength in cosmic web filaments
• Probing Intergalactic Magnetic Fields with Simulations of Electromagnetic Cascades
• Diffusion of cosmic rays at EeV energies in inhomogeneous extragalactic magnetic fields
• New constraints on the magnetic field in filaments of the cosmic web
• Multimessenger Constraints on Intergalactic Magnetic Fields from the Flare of TXS 0506+056
• Large-scale cosmic ray anisotropies with 19 years of data from the Pierre Auger Observatory
• The Diffuse Gamma-Ray Flux from Clusters of Galaxies
• The coherent magnetic field of the Milky Way halo, Local Bubble and Fan Region
• Constraints on UHECR sources and extragalactic magnetic fields from directional anisotropies
• Impact of the Magnetic Horizon on the Interpretation of the Pierre Auger Observatory Spectrum and Composition Data
• Caustic-like Structures in UHECR Flux after Propagation in Turbulent Intergalactic Magnetic Fields
• The large-scale anisotropy and flux (de-)magnification of ultra-high-energy cosmic rays in the Galactic magnetic field
• Images of the Ultra-High Energy Cosmic Rays from Point Sources