201 citations · 412 across the 10 of their papers we have counts for
12 papers
Optical Signatures of Black Holes Surrounded by a Generalized Cloud of Strings
Marcos V. de S. Silva, Ednaldo L. B. Junior, Carlos F. S. Pereira +1
In this work, we investigate the optical signatures of black holes surrounded by a generalized cloud of strings, described by the Letelier--Alencar spacetime. We first analyze null…
From massless wormholes to massive black bounces: Shadows and multiple light rings
G. Alencar, Kirill A. Bronnikov, T. M. Crispim +2
We develop a general framework for constructing massive black bounce geometries from massless wormhole seeds by introducing a position-dependent mass function while preserving the…
Light propagation and gravitational lensing effects in charged Kalb-Ramond spacetime in nonlinear electrodynamics
C. F. S. Pereira, Marcos V. de S. Silva, A. R. Soares +3
In this work, we theoretically investigate the deflection of light for strong- and weak-field regimes in the background of an electrically charged BH described in Kalb-Ramond gravi…
Light propagation and quasinormal modes of a topologically charged Schwarzschild-Klinkhamer wormhole
C. F. S. Pereira, H. Belich, A. R. Soares +3
In this work, we present a theoretical analysis of null geodesics, critical photon orbits, and shadow formation associated with a wormhole generated by a geometric defect. The prop…
Sources of matter for wormholes in a k-essence theory
Marcos V. de S. Silva, Carlos F. S. Pereira, Bruna Bragato +3
In this work, we analyze some matter sources associated with wormhole models within a k-essence theory coupled to the gravitational sector through a phantom scalar field. We adopt…
Orbits around a black bounce spacetime
Marcos V. de S. Silva, Manuel E. Rodrigues
In this work, the trajectories of particles around a black bounce spacetime are considered, with the Simpson-Visser model serving as an example. Trajectories for massless and massi…
On black bounce space-times in non-linear electrodynamics
G. Alencar, Kirill A. Bronnikov, Manuel E. Rodrigues +2
One of the main issues in gravitation is the presence of singularities in the most common space-time solutions of General Relativity, as the case of black holes. A way of construct…
Cylindrical black bounces and their field sources
Kirill A. Bronnikov, Manuel E. Rodrigues, Marcos V. de S. Silva
We apply the Simpson-Visser phenomenological regularization method to a cylindrically symmetric solution of the Einstein-Maxwell equations known as an inverted black hole. In addit…
Source of black bounces in general relativity
Manuel E. Rodrigues, Marcos V. de S. Silva
Black bounces are spacetimes that can describe, depending on certain parameters, black holes or wormholes. In this work, we use a method to obtain the matter content that generates…
Black Bounces with multiple throats and anti-throats
Manuel E. Rodrigues, Marcos V. de S. Silva
In this article, we test the possibility of building new black-bounce spacetimes with changes in the area in the context of general relativity in four dimensions. These new metrics…
Novel black-bounce spacetimes: wormholes, regularity, energy conditions, and causal structure
Francisco S. N. Lobo, Manuel E. Rodrigues, Marcos V. de S. Silva +2
We develop a number of novel "black-bounce" spacetimes. These are specific regular black holes where the "area radius" always remains non-zero, thereby leading to a "throat" that i…
Using Dominant and Weak Energy Conditions for build New Classes of Regular Black Holes
Manuel E. Rodrigues, Ednaldo L. B. Junior, Marcos V. de S. Silva
We study the generalization of the mass function of classes of regular spherically symmetric black holes solutions of in coming from the coupling of General Relativity with…