89 citations · 176 across the 6 of their papers we have counts for
6 papers
Causal structure of black holes immersed in a Chaplygin-like dark fluid environment: Horizons and singularities
Rodrigo Dal Bosco Fontana, Jeferson de Oliveira
In the present work, we study the causal structure of spherically symmetric black holes immersed in a Chaplygin-like dark fluid, emphasizing the impact of the fluid parameters on c…
Analytical correspondence between shadow radius and black hole quasinormal frequencies
B. Cuadros-Melgar, R. D. B. Fontana, Jeferson de Oliveira
We consider the equivalence of quasinormal modes and geodesic quantities recently brought back due to the black hole shadow observation by Event Horizon Telescope. Using WKB method…
Late-time tails, entropy aspects, and stability of black holes with anisotropic fluids
B. Cuadros-Melgar, R. D. B. Fontana, Jeferson de Oliveira
In this work we consider black holes surrounded by anisotropic fluids in four dimensions. We first study the causal structure of these solutions showing some similarities and diffe…
Vectorial and spinorial perturbations in Galileon Black Holes: Quasinormal modes, quasiresonant modes and stability
E. Abdalla, B. Cuadros-Melgar, Jeferson de Oliveira +2
In this work we have considered a model that includes the interaction of gravity and matter fields with Galilean invariance (the so-called derivative coupling) as well as some corr…
Dynamical evolution of non-minimally coupled scalar field in spherically symmetric de Sitter spacetimes
R. D. B. Fontana, Jeferson de Oliveira, A. B. Pavan
We investigate the dynamical behavior of a scalar field non-minimally coupled to Einstein's tensor and Ricci scalar in geometries of asymptotically de Sitter spacetimes. We show th…
Three-dimensional black holes with quintessence
Jeferson de Oliveira, R. D. B. Fontana
We study a quintessential black hole solution in three dimensions, with mass and quintessence charge. By exploring the Carter-Penrose diagram, we show the presence of spacelike and…