22 citations · 87 across the 13 of their papers we have counts for
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Thin-Shell Black Bounce
Leandro A. Lessa, Renan B. Magalhães, Gonzalo J. Olmo
A recently proposed class of black-bounce solutions sourced by anisotropic fluids, whose exterior reproduces the Reissner-Nordström geometry all the way down to a minimal-area boun…
Charged particles and fields in bumblebee gravity: Periodic orbits and superradiance
Marco A. A. de Paula, Renan B. Magalhães, V. B. Bezerra +1
We investigate the dynamics of charged particles and fields in the background of a charged black hole in bumblebee gravity, aiming to better understand the role played by the Loren…
Hairy black holes via gravitational decoupling: light rings, absorption and spectral lines
Gabriel P. Ribeiro, Renan B. Magalhães, Luís C. B. Crispino
We investigate the absorption of massless scalar waves by three distinct hairy black hole solutions obtained through the gravitational decoupling method, considering the weak, the…
Spectral lines of dirty wormholes
Leonardo K. S. Furuta, Renan B. Magalhães, Haroldo C. D. Lima Junior +1
Astrophysical objects like black holes are usually surrounded by matter in the form of accretion disks or jets of matter. These astrophysical scenarios are expected to introduce no…
Resolving space-time singularities in spherically symmetric black holes: geodesic completeness, curvature scalars, and tidal forces
Haroldo C. D. Lima Junior, Renan B. Magalhães, Gonzalo J. Olmo +1
The existence of black holes in the Universe is nowadays established on the grounds of a blench of astrophysical observations, most notably those of gravitational waves from binary…
Singular space-times with bounded algebraic curvature scalars
Renan B. Magalhães, Gabriel P. Ribeiro, Haroldo C. D. Lima Junior +2
We show that the absence of unbounded algebraic curvature invariants constructed from polynomials of the Riemann tensor cannot guarantee the absence of strong singularities. As a c…
Echoes from bounded universes
Renan B. Magalhães, Andreu Masó-Ferrando, Flavio Bombacigno +2
We construct a general class of modified Ellis wormholes, where one asymptotic Minkowski region is replaced by a bounded 2-sphere core, characterized by asymptotic finite areal rad…
Parametrized black holes: Scattering investigation
Renan B. Magalhães, Luiz C. S. Leite, Luís C. B. Crispino
We study the scattering of light-like geodesics and massless scalar waves by a static Konoplya-Zhidenko black hole, considering the case that the parametrized black hole solution c…
Asymmetric wormholes in Palatini gravity: Energy conditions, absorption and quasibound states
Renan B. Magalhães, Andreu Masó-Ferrando, Gonzalo J. Olmo +1
We investigate the absorption properties of reflection-asymmetric wormholes constructed via the thin-shell formalism in Palatini gravity. Such wormholes come from the…
Compact objects in quadratic Palatini gravity generated by a free scalar field
Renan B. Magalhães, Luís C. B. Crispino, Gonzalo J. Olmo
We study the correspondence that connects the space of solutions of General Relativity (GR) with that of Ricci-based Gravity theories (RBGs) of the type in the metric-affi…
Scattering by deformed black holes
Renan B. Magalhães, Luiz C. S. Leite, Luís C. B. Crispino
Obtaining black hole solutions in alternative theories of gravity can be a difficult task due to cumbersome field equations that arise in many of such theories. In order to study t…
Schwarzschild-like black holes: Light-like trajectories and massless scalar absorption
Renan B. Magalhães, Luiz C. S. Leite, Luís C. B. Crispino
Black holes are among the most intriguing objects in nature. They are believed to be fully described by General Relativity (GR), and the astrophysical black holes are expected to b…
Absorption by deformed black holes
Renan B. Magalhães, Luiz C. S. Leite, Luís C. B. Crispino
Alternative theories of gravity and the parameterized deviation approach allow black hole solutions to have additional parameters beyond mass, charge and angular momentum. Matter f…