Horizon-scale images of black holes (BHs) and their shadows have opened an
unprecedented window onto tests of gravity and fundamental physics in the strong-field …

Our Universe is permeated with interstellar plasma, which prevents propagation of low-
frequency electromagnetic waves. Here, we show that two dramatic consequences arise out …

We study the dynamics and oscillations of electrically charged particles along stable circular
orbits around a nonrotating electrically charged spacetime. In this work, we consider a …

Within nonlinear electrodynamics (NED), photons follow null geodesics of an effective
geometry, which is different from the geometry of the spacetime itself. Over the last years …

ABSTRACT Gravitational-wave (GW) astronomy, together with precise pulsar timing and
long baseline interferometry, is changing our ability to perform tests of fundamental physics …

More than two years ago the Event Horizon Telescope collaboration presented the first
image reconstruction around the shadow for the supermassive black hole in M87*. It gives …

Whether astrophysical black holes (BHs) can have charge is a question to be addressed by
observations. In the era of gravitational wave (GW) astronomy, one can constrain the charge …

Nonlinear electrodynamic (NLED) theories are well motivated for their extensions to
classical electrodynamics in the strong field regime, and have been extensively investigated …

Black hole-neutron star (BH-NS) mergers are expected to emit gravitational wave (GW) and
electromagnetic (EM) counterparts when the NS is tidally disrupted or plunges into the BH …

We study the null and timelike geodesics of light and the neutral particles, respectively, in
the exterior of Kerr-Newman black holes. The geodesic equations are known to be written as …