The Cosmic-Ray Extremely Distributed Observatory (CREDO) is a newly formed, global
collaboration dedicated to observing and studying cosmic rays (CR) and cosmic-ray …

We investigate particle motion in the vicinity of a 4 D Einstein–Gauss–Bonnet (EGB) black
hole immersed in external asymptotically uniform magnetic field. It is well known that …

We present a review of the influence of cosmic repulsion and external magnetic fields on
accretion disks rotating around rotating black holes and on jets associated with these …

We present the results from a full polarization study carried out with the Atacama Large
Millimeter/submillimeter Array (ALMA) during the first Very Long Baseline Interferometry …

Messier 87 (M 87) is one of the nearest radio galaxies with a prominent jet extending from
sub-pc to kpc scales. Because of its proximity and the large mass of its central black hole …

The production and acceleration mechanisms of ultrahigh-energy cosmic rays (UHECRs) of
energy> 10 20 eV, clearly beyond the GZK cutoff limit, remain unclear, which points to the …

We present a review of the Penrose process and its modifications in relation to the Kerr
black holes and naked singularities (superspinars). We introduce the standard variant of this …

In this Letter, we wish to point out that the distinguishing feature of magnetic Penrose
process (MPP) is its super high-efficiency exceeding (which was established in mid 1980s …

We present the first results of a project called SAGAN, which is dedicated solely to the
studies of relatively rare megaparsec-scale radio galaxies in the Universe, called giant radio …

Aims. The collimation of relativistic jets in galaxies is a poorly understood process. Detailed
radio studies of the jet collimation region have been performed so far in a few individual …