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 …

We review spherical and inhomogeneous analytic solutions of the field equations of Einstein
and of scalar–tensor gravity, including Brans–Dicke theory, non-minimally (possibly …

In this paper, we review some general aspects of modified gravity theories, investigating
mathematical and physical properties and, more specifically, the feature of viable and …

A new class of analytic charged spherically symmetric black hole solutions, which behave
asymptotically as flat or (anti-) de Sitter spacetimes, is derived for specific classes of f (R) …

We investigate static and rotating charged spherically symmetric solutions in the framework
of f (R) gravity, allowing additionally the electromagnetic sector to depart from linearity …

We study black hole solutions in extended gravities with higher-order curvature terms,
including conformal and Einstein-Weyl gravities. In addition to the usual anti-de Sitter (AdS) …

Novel static black hole solutions with electric and magnetic charges are derived for the class
of modified gravities: f (R)= R+ 2 β R f (R)= R+ 2 β R, with or without a cosmological …

Recent observation shows that general relativity (GR) is not valid in the strong regime. f (R)
gravity, where R is the Ricci scalar, is regarded to be a good candidate able to cure the …

A toy model of Einstein gravity with a Gauss-Bonnet classically “entropic” term mimicking a
quantum correction is considered. The static black hole solution due to Tomozawa is found …

We investigate the stability of motion and the thermodynamics in the case of spherically
symmetric solutions in f (T) gravity using the perturbative approach. We consider small …