UHECR propagation in the Galactic Magnetic Field

Understand

Extensive simulations of the ultra-high energy cosmic ray (UHECR) propagation in the Galactic magnetic field (GMF) have been performed, and the results are presented.

• The use of different available models of the large-scale GMF and/or primary particle assumptions leads to distinctly different deflection patterns of the highest energy cosmic rays (CR).
• The lensing effects of the Galactic field modify the exposure of an UHECR experiment to the extragalactic sky.
• To quantify these effects for the Pierre Auger experiment, we performed a correlation analysis of the simulated cosmic ray event samples, backtracked from the Earth to the Galactic border, with the active galactic nuclei (AGN) from the 12th edition of the V\'eron-Cetty and V\'eron catalogue.