22 citations · 114 across the 22 of their papers we have counts for
22 papers
On correlated noise in the LIGO-Virgo network: a test of the stochastic gravitational-wave background hypothesis
S. C. Ulhoa, B. C. C. Carneiro, F. L. Carneiro +1
We revisit the inter-detector cross-correlation criterion used in gravitational-wave validation by extending the analysis of Creswell et al.~\cite{Creswell2017} to nine LIGO--Virgo…
On the Gravitational Angular Momentum of Axial Perturbations of a Regular Black Hole
S. C. Ulhoa, F. L. Carneiro, B. C. C. Carneiro
This Letter deals with the gravitational angular momentum carried by axial (odd-parity) perturbations of the Bardeen regular black hole within the teleparallel equivalent of genera…
The Role of Gravitational Energy Flux in Cosmic Acceleration
S. C. Ulhoa, F. L. Carneiro, J. W. Maluf
The article deals with the role of gravitational radiation energy in the large-scale dynamics of the universe. Motivated by the observed accelerated expansion, we investigate wheth…
Blueshift of light rays induced by gravitational wave memory effect
F. L. Carneiro, S. C. Ulhoa, J. W. Maluf
The article deals with photon propagation in pp-wave spacetimes in the strong gravitational-wave regime and its consequences for redshift measurements. We show that null geodesics…
On the Gravitational Energy of Axial Perturbations in Regular Black Holes
S. C. Ulhoa, F. L. Carneiro, B. C. C. Carneiro
The article deals with the gravitational energy associated with axial perturbations of regular black holes. We review the stability of the geometry under odd-parity perturbations a…
On Reference Frames and Coordinate Transformations
F. L. Carneiro, S. C. Ulhoa, M. P. Lobo
This article explores the differences between frame and coordinate transformations in relativistic theories. We highlight the key role of tetrad fields in connecting spacetime and…
The irreducible mass of a regular rotating black hole
F. L. Carneiro, S. C. Ulhoa, J. F. da Rocha-Neto +1
This article presents an analysis of regular rotating black hole solutions within the framework of Teleparallel Equivalent to General Relativity (TEGR). The study evaluates the tot…
Energy of Gravitational Radiation and the Background Energy of the Space-Time
J. W. Maluf, F. Lessa Carneiro, S. C. Ulhoa +1
We address the issue of gravitational radiation in the context of the Bondi-Sachs space-time, and consider the expression for the gravitational energy of the radiation obtained in…
On the Thermodynamics of Gravitational Radiation
S. C. Ulhoa, F. L. Carneiro, J. W. Maluf
This article deals with the thermodynamics of gravitational radiation arising from the Bondi-Sachs space-time. The equation of state found allows us to conclude that the dependence…
Tetrad Fields, Reference Frames, and the Gravitational Energy-Momentum in the Teleparallel Equivalent of General Relativity
J. W. Maluf, F. L. Carneiro, S. C. Ulhoa +1
We review the concept and definitions of the energy-momentum and angular momentum of the gravitational field in the teleparallel equivalent of general relativity (TEGR). The import…
Kerr-Schild Tetrads and the Nijenhuis Tensor
J. W. Maluf, F. L. Carneiro, S. C. Ulhoa +1
We write the Kerr-Schild tetrads in terms of the flat space-time tetrads and of a (1,1) tensor . This tensor can be considered as a projection operator, since it transforms…
On the total energy conservation of the Alcubierre spacetime
F. L. Carneiro, S. C. Ulhoa, J. W. Maluf +1
In this article, we consider the Alcubierre spacetime, such a spacetime describes a ``bubble'' that propagates with arbitrary global velocity. This setting allows movement at a spe…
On the Black Hole Acceleration in the C-metric Space-time
F. L. Carneiro, S. C. Ulhoa, J. W. Maluf
We consider the C-metric as a gravitational field configuration that describes an accelerating black hole in the presence of a semi-infinite cosmic string, along the accelerating d…
Perturbations of the Gravitational Energy in the TEGR: Quasinormal Modes of the Schwarzschild Black Hole
J. W. Maluf, S. C. Ulhoa, F. L. Carneiro +1
We calculate the gravitational energy spectrum of the perturbations of a Schwarzschild black hole described by quasinormal modes, in the framework of the teleparallel equivalent of…
Non-linear Plane Gravitational Waves as Space-time Defects
F. L. Carneiro, S. C. Ulhoa, J. W. Maluf +1
We consider non-linear plane gravitational waves as propagating space-time defects, and construct the Burgers vector of the waves. In the context of classical continuum systems, th…
On the Quantization of Burgers Vector and Gravitational Energy in the Space-Time of a Conical Defect
F. L. Carneiro, S. C. Ulhoa, J. F. da Rocha-Neto +1
A conical topological defect is the result of translational and/or rotational deformations of spacetime, in particular the Burgers vector describes the translational deformation. S…
Energy-momentum and angular-momentum of a gyratonic pp-waves spacetime
F. L. Carneiro, S. C. Ulhoa, J. F. da Rocha-Neto
Gyratonic plane fronted gravitational waves are exact solutions of Einstein's field equations, which correspond to gravitational waves that carry momentum and angular-momentum. Usi…
Difficulties of Teleparallel Theories of Gravity with Local Lorentz Symmetry
J. W. Maluf, S. C. Ulhoa, J. F. da Rocha-Neto +1
A brief discussion is made about the relevance of surface terms in the Lagrangian and Hamiltonian formulations of theories of gravity. These surface terms play an important role in…
The Work-Energy Relation for Particles on Geodesics in the pp-Wave Spacetimes
J. W. Maluf, J. F. da Rocha-Neto, S. C. Ulhoa +1
A non-linear gravitational wave imparts gravitational acceleration to all particles that are hit by the wave. We evaluate this acceleration for particles in the pp-wave space-times…
Variations of the Energy of Free Particles in the pp-Wave Spacetimes
J. W. Maluf, J. F. da Rocha-Neto, S. C. Ulhoa +1
We consider the action of exact plane gravitational waves, or pp-waves, on free particles. The analysis is carried out by investigating the variations of the geodesic trajectories…
Kinetic Energy and Angular Momentum of Free Particles in the Gyratonic pp-Waves Space-times
J. W. Maluf, J. F. da Rocha-Neto, S. C. Ulhoa +1
Gyratonic pp-waves are exact solutions of Einstein's equations that represent non-linear gravitational waves endowed with angular momentum. We consider gyratonic pp-waves that trav…
Plane Gravitational Waves, the Kinetic Energy of Free Particles and the Memory Effect
J. W. Maluf, J. F. da Rocha-Neto, S. C. Ulhoa +1
It is shown that in the passage of a short burst of non-linear plane gravitational wave, the kinetic energy of free particles may either decrease or increase. The decreasing or inc…