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

We give a brief review on the formation and the calculation of black hole shadows. Firstly,
we introduce the concept of a black hole shadow and the current works on a variety of black …

We consider a simple spherical model consisting of a Schwarzschild black hole of mass M
and a dark matter of mass ΔM around it. The general formula for the radius of black-hole …

In this paper, we study rotating black holes in symmergent gravity, and use deviations from
the Kerr black hole to constrain the parameters of the symmergent gravity. Symmergent …

We study the influence of the cosmic expansion on the size of the shadow of a spinning
black hole observed by a comoving observer. We first consider that the expansion is driven …

We study the shadow cast or silhouette generated by a Kerr-Newman-Kasuya (KNK)
spacetime (rotating dyon black hole). It is shown that in addition to the angular momentum of …

Abstract In this work, we explored the effect of the fuzzy dark matter (FDM)(or wave dark
matter) halo on a supermassive black hole (SMBH). Such a dark matter introduces a soliton …

We investigate the gravitational lensing by spinning Proca stars and the shadows and
lensing by Kerr black holes (BHs) with synchronised Proca hair, discussing both theoretical …

Abstract The Event Horizon Telescope (EHT), a global submillimeter wavelength very long
baseline interferometry array, unveiled event-horizon–scale images of the supermassive …

Taking QED effect into account, we investigate the shadows of a static black hole with
magnetic monopoles and neutral black holes in magnetic fields through the numerical …