activity
20112026
most citedBlack holes with a cosmological constant in bumblebee gravity

182 citations · 1.6k across the 70 of their papers we have counts for

collaborators

74 papers

gr-qc2026

Bounds on Black Bounces from Phenomenological Imprints

Alana C. L. Santos, Marcos S. Melo, Roberto V. Maluf

In this work, we derive phenomenological constraints on a symmetric black-bounce geometry supported by an anisotropic fluid. We investigate the effects of the bounce parameter and…

gr-qc2026

Shadows and gravitational perturbations of black bounces

Alana C. L. Santos, Leandro A. Lessa, Roberto V. Maluf +1

We investigate axial gravitational perturbations and shadow formation in black-bounce geometries supported by anisotropic fluids within general relativity. Two distinct classes of…

hep-th2026

Nonlocal Rarita-Schwinger theory

Fernando M. Belchior, Roberto V. Maluf

In this paper, one constructs a nonlocal extension of the Rarita-Schwinger theory for spin- fermions. Two classes of analytic form factors are considered: scalar form factors…

hep-th2026

Duality in topologically massive models with term

Fernando M. Belchior, Roberto V. Maluf

This paper aims to investigate the classical duality between the -Maxwell-Kalb-Ramond (MKR) theory and a self-dual non-gauge-invariant model. First, we establish the equiva…

gr-qc2025

Braneworlds in Einstein-Scalar-Gauss-Bonnet gravity

José Euclides G. Silva, Leandro A. Lessa, Roberto V. Maluf

We explore the features of a thick braneworld model in five dimensions governed by a Einstein-Gauss-Bonnet gravity with a non-minimal coupling to a dynamical scalar field. We consi…

gr-qc2025

Fermionic greybody factors and strong gravitational lensing by Lorentz-violating global monopole

F. M. Belchior, R. V. Maluf, A. R. M. Oliveira +2

In this work, we study the greybody factors (GFs) of spin 1/2 and spin 3/2 fermions for a black hole with global monopole in self-interacting Kalb-Ramond gravity with Lorentz symme…