The present white paper is submitted as part of the “Snowmass” process to help inform the
long-term plans of the United States Department of Energy and the National Science …

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 …

The tidal disruption event AT2018hyz, was a regular optically detected one with no special
prompt features. However, almost three years after the disruption it suddenly displayed a fast …

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 …

Context. In recent years, evidence for an anisotropic distribution of ultra-high-energy cosmic
rays (UHECRs) has been claimed, notably a dipole modulation in right ascension has been …

The combined fit of the measured energy spectrum and shower maximum depth
distributions of ultra-high-energy cosmic rays is known to constrain the parameters of …

Understanding the acceleration of Ultra High Energy Cosmic Rays is one of the great
challenges of contemporary astrophysics. In this short review, we summarize the general …

We use a new method to estimate the injected mass composition of ultrahigh cosmic rays
(UHECRs) at energies higher than 10 EeV. The method is based on comparison of the …

Ultra-high energy cosmic rays (UHECR) are particles with energies above 1 EeV that hit our
atmosphere coming from space. Their origin remains an open question in physics and …

Radio galaxies are promising candidates as the sources of ultrahigh energy cosmic rays
(UHECRs). In this work, we examine if the stringent constraints imposed by the dipole and …