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 …

We discuss exact regular compact object solutions in higher-dimensional extensions of
general relativity sourced by a phantom scalar field in arbitrary D spacetime dimensions (D> …

We find a plethora of new analytic black holes and globally regular horizonless spacetimes
in three dimensions. The solutions involve a single real scalar field ϕ which always admits a …

Three-dimensional static and spinning black hole solutions of the Einstein-Klein-Gordon
system are obtained for a particular scalar field configuration. At large distances, and for a …

We consider higher-order derivative gauge field corrections that arise in the fundamental
context of dimensional reduction of string theory and Lovelock-inspired gravities and obtain …

We derive an exact wormhole spacetime supported by a phantom scalar field in the context
of f (R) gravity theory. Without specifying the form of the f (R) function, the scalar field self …

In this work, we delve into the model of the shift symmetric and parity-preserving beyond
Horndeski theory in all its generality. We present an explicit algorithm to extract static and …

In the framework of a simple gravitational theory that contains a scalar field minimally
coupled to gravity, we investigate the emergence of analytic black-hole solutions with …

We study the Einstein-Euler-Heisenberg theory in the presence of a self interacting scalar
field, minimally coupled to gravity. We solve analytically the field equations for the …

We report exact black hole solutions in asymptotically flat or (A) dS four-dimensional
spacetime with a conformally coupled self-interacting scalar field in f (R) gravity. We first …