In recent years, unprecedented progress has been achieved regarding black holes'
observation through the electromagnetic channel. The images of the supermassive black …

More than a century ago, Albert Einstein presented his general theory of gravitation (GR) to
the Prussian Academy of Sciences. One of the predictions of the theory is that not only …

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 …

In April 2019, the Event Horizon Telescope (EHT) Collaboration reported the first-ever event-
horizon-scale images of a black hole, resolving the central compact radio source in the giant …

Ultralight bosons can affect the dynamics of spinning black holes (BHs) via superradiant
instability, which can lead to a time evolution of the supermassive BH shadow. We study …

We report on the polarized light curves of the Galactic Center supermassive black hole
Sagittarius A*, obtained at millimeter wavelength with the Atacama Large Millimeter …

The bumblebee gravity model, with a vector field nonminimally coupled to gravity, is a
natural extension of the Einstein-Maxwell theory. In this theory, a black hole can carry a …

The formation of jets in black hole accretion systems is a long-standing problem. It has been
proposed that a jet can be formed by extracting the rotation energy of the black hole (“BZ …

Black hole (BH) shadows can be used to probe new physics in the form of ultralight particles
via the phenomenon of superradiant instability. By directly affecting the BH mass and spin …

Non-linear interaction between the electromagnetic fields (EMF) occurs when vacuum
polarization in quantum electrodynamics (QED) happens. The field of non-linear …