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 …

The Event Horizon Telescope (EHT) collaboration has recently released the first image of a
black hole (BH), opening a new window onto tests of general relativity in the strong field …

The Event Horizon Telescope has recently provided the first image of the dark shadow
around the supermassive black hole M87*. The observation of a highly circular shadow …

In this paper, we construct an effective rotating loop quantum black hole (LQBH) solution,
starting from the spherical symmetric LQBH by applying the Newman-Janis algorithm …

The recent discovery of the novel four-dimensional static and spherically symmetric Gauss–
Bonnet black hole provides a promising bed to test Gauss–Bonnet gravity by using …

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 …

In this paper, we study the shadow cast by two types of charged and slowly rotating black
holes in the Einstein-Æther theory of gravity. These two types of black holes correspond to …

In this paper, we explore three simple models of accretions on a global monopole black hole
in f (R) theory, and numerically study the corresponding observational appearances as seen …

In this paper, under the illumination of thin disk accretion, we have employed the ray-tracing
method to carefully investigate shadows and rings of the Kehagias-Sfetsos (KS) black hole …