182 citations · 870 across the 30 of their papers we have counts for
19 papers · 1 filter
Stars and quark stars in bumblebee gravity
Juliano C. S. Neves, Fernando G. Gardim
In this work, the interior spacetime of stars is built in a Lorentz symmetry breaking model called bumblebee gravity. Firstly, we calculated the modified Tolman-Oppenheimer-Volkoff…
Shadows of black holes at cosmological distances in the co-varying physical couplings framework
R. R. Cuzinatto, C. A. M. de Melo, Juliano C. S. Neves
The co-varying physical couplings (CPC) framework states that physical parameters like the speed of light in vacuum , the Newtonian constant , and the cosmological constant $…
Viable wormhole solution in Bopp-Podolsky electrodynamics
D. A. Frizo, C. A. M. de Melo, L. G. Medeiros +1
Following a recent approach in which the gravitational field equations in curved spacetimes were presented in the Bopp--Podolsky electrodynamics, we obtained an approximate and sph…
Kasner cosmology in bumblebee gravity
Juliano C. S. Neves
Kasner cosmology is a vacuum and anisotropically expanding spacetime in the general relativity context. In this work, such a cosmological model is studied in another context, the b…
Bianchi type I cosmology with a Kalb-Ramond background field
R. V. Maluf, Juliano C. S. Neves
An effect of the Lorentz symmetry breaking is pointed out in the cosmological context. Using a Bianchi I geometry coupled to the Kalb-Ramond field, a consequence of the Lorentz sym…
Bumblebee field as a source of cosmological anisotropies
R. V. Maluf, Juliano C. S. Neves
In this work, a bumblebee field is adopted in order to generate cosmological anisotropies. For that purpose, we assume a Bianchi I cosmology, as the background geometry, and a bumb…
Black holes with a cosmological constant in bumblebee gravity
R. V. Maluf, Juliano C. S. Neves
In this work, we present black hole solutions with a cosmological constant in bumblebee gravity, which provides a mechanism for the Lorentz symmetry violation by assuming a nonzero…
Constraining the tidal charge of brane black holes using their shadows
Juliano C. S. Neves
A constraint on the tidal charge generated within a brane world is shown. Using the shadow of a rotating black hole in a brane context in order to describe the M87* parameters rece…
Upper bound on the GUP parameter using the black hole shadow
Juliano C. S. Neves
An upper bound on the parameter that provides a generalized uncertainty principle (GUP) is obtained from the black hole shadow. With the aid of a recent constraint between regular…
Accretion of perfect fluids onto a class of regular black holes
Juliano C. S. Neves, Alberto Saa
We consider the stationary spherical accretion process of perfect fluids onto a class of spherically symmetric regular black holes corresponding to quantum-corrected Schwarzschild…
Bardeen regular black hole as a quantum-corrected Schwarzschild black hole
R. V. Maluf, Juliano C. S. Neves
Bardeen regular black hole is commonly considered as a solution of general relativity coupled to a nonlinear electrodynamics. In this paper, it is shown that the Bardeen solution m…
Thermodynamics of a class of regular black holes with a generalized uncertainty principle
R. V. Maluf, Juliano C. S. Neves
In this article, we present a study on thermodynamics of a class of regular black holes. Such a class includes Bardeen and Hayward regular black holes. We obtained thermodynamic qu…
Well-behaved relativity: regular black holes
J. C. S. Neves
The recent observation of gravitational waves confirms one of the most interesting predictions in general relativity: the black holes. Because the gravitational waves detected by L…
Bouncing cosmology inspired by regular black holes
J. C. S. Neves
In this article, we present a bouncing cosmology inspired by a family of regular black holes. This scale-dependent cosmology deviates from the cosmological principle by means of a…
Are black holes in an ekpyrotic phase possible?
J. C. S. Neves
The ekpyrotic phase (a slow contraction cosmic phase before the current expansion phase) manages to solve the main problems of the standard cosmology by means of a scalar field int…
Deforming regular black holes
J. C. S. Neves
In this work we have deformed regular black holes which possess a general mass term described by a function which generalizes the Bardeen and Hayward mass functions. By using linea…
Regular rotating black holes and the weak energy condition
J. C. S. Neves, Alberto Saa
We revisit here a recent work on regular rotating black holes. We introduce a new mass function generalizing the commonly used Bardeen and Hayward mass functions and extend the rec…
Rotating black holes in a Randall-Sundrum brane with a cosmological constant
J. C. S. Neves, C. Molina
In this work we have constructed axially symmetric vacuum solutions of the gravitational field equations in a Randall-Sundrum brane. A non-null effective cosmological constant is c…
Wormholes in de Sitter branes
C. Molina, J. C. S. Neves
In this work we present a class of geometries which describes wormholes in a Randall-Sundrum brane model, focusing on de Sitter backgrounds. Maximal extensions of the solutions are…