Active Galactic Nuclei (AGNs) and their relativistic jets belong to the most promising class of
ultra-high-energy cosmic ray (UHECR) accelerators. This compact review summarises basic …

In this work we present the interpretation of the energy spectrum and mass composition data
as measured by the Pierre Auger Collaboration above 6× 1017 eV. We use an astrophysical …

Cosmic rays are energetic charged particles from extraterrestrial sources, with the highest-
energy events thought to come from extragalactic sources. Their arrival is infrequent, so …

We test the hypothesis of starburst galaxies as sources of ultrahigh energy cosmic rays and
high energy neutrinos. The computation of interactions of ultrahigh energy cosmic rays in the …

Abstract The Telescope Array Collaboration recently reported the detection of a cosmic-ray
particle," Amaterasu," with an extremely high energy of 2.4× 10 20 eV. Here we investigate …

Galaxy clusters are the largest objects in the Universe kept together by gravity. Most of their
baryonic content is made of a magnetized diffuse plasma. We investigate the impact of such …

We present a suite of models of the coherent magnetic field of the Galaxy based on new
divergence-free parametric functions describing the global structure of the field. The model …

The unification of quantum mechanics and general relativity has long been elusive. Only
recently have empirical predictions of various possible theories of quantum gravity been put …

Understanding the anisotropy of ultra high-energy cosmic rays (UHECRs) is crucial for
unraveling the origins and propagation mechanisms of these enigmatic particles. In this …

By combining swampland conjectures with observational data, it was recently pointed out
that our universe could stretch off in an asymptotic region of the string landscape of vacua …