The universe is magnetized on all scales probed so far. On the largest scales, galaxies and
galaxy clusters host magnetic fields at the micro Gauss level coherent on scales up to ten …

One of the most promising ways to probe intergalactic magnetic fields (IGMFs) is through
gamma rays produced in electromagnetic cascades initiated by high-energy gamma rays or …

The origin and maintenance of coherent magnetic fields in the Universe is reviewed with an
emphasis on the possible challenges that arise in their theoretical understanding. We begin …

Particle acceleration in collisionless plasma systems is a central question in astroplasma
and astroparticle physics. The structure of the acceleration regions, electron–ion energy …

We study the effect of a tangled sub-fG level intergalactic magnetic field (IGMF) on the
electrostatic instability of a blazar-induced pair beam. Sufficiently strong IGMF may …

This work revisits the electrostatic instability for blazar-induced pair beams propagating
through the intergalactic medium (IGM) using linear analysis and PIC simulations. We study …

The fate of relativistic pair beams produced in the intergalactic medium by very high energy
emission from blazars remains controversial in the literature. The possible role of resonance …

Relativistic pair beams produced in the cosmic voids by TeV gamma-rays from blazars are
expected to produce a detectable GeV-scale cascade that is missing in the observations …

Properties of the extragalactic magnetic field (EGMF) outside of clusters and filaments of the
large-scale structure are essentially unknown. The EGMF could be probed with γ-ray …

We study the longitudinal stability of beam–plasma systems in the presence of a density
inhomogeneity in the background plasma. Previous works have focused on the non …