Cosmic-ray particles with energies in excess of 1020eV have been detected. The sources as
well as the physical mechanism (s) responsible for endowing cosmic-ray particles with such …

The origin of the highest energy cosmic rays is still unknown. The discovery of their sources
is expected to reveal the workings of the most energetic astrophysical accelerators in the …

We show that cosmic-ray observations set a model-independent upper bound of E ν 2 Φ ν<
2× 10− 8 G e V/cm 2 s sr to the intensity of high-energy neutrinos produced by photo-meson …

The nature and origin of turbulence and magnetic fields in the intergalactic space are
important problems that are yet to be understood. We propose a scenario in which turbulent …

We obtain the maximum diffuse neutrino intensity predicted by hadronic photoproduction
models of the type which have been applied to the jets of active galactic nuclei or gamma …

We use simulations of large-scale structure formation to study the build-up of magnetic fields
(MFs) in the intergalactic medium. Our basic assumption is that cosmological MFs grow in a …

We give for a plasma with a history of several expansion and contraction phases an
analytical model of the evolution of a contained relativistic electron population under …

We study the effect of inhomogeneities in the matter distribution of the universe on the
Faraday rotation of light from distant QSOs and derive new limits on the cosmological …

We have examined the properties of shock waves in simulations of large-scale structure
formation. Two cosmological scenarios have been considered: a standard cold dark matter …

We study within a fully kinetic framework the generation of “seed” magnetic fields through
the Weibel instability, driven in an initially unmagnetized plasma by a large-scale shear …