10 citations · 26 across the 7 of their papers we have counts for
7 papers
Inflationary Cosmology in Scalar-Tensor Gravity: Reconstructing Higgs-Like Potentials
Anderson Mendonça da Silva, Jim E. F. Skea
We study cosmology in scalar-tensor (Bergmann Wagoner) gravity, restricting the coupling function, to be constant. Rather than specify the form of the cosmological function,…
The stability of the triangular libration points for the plane circular restricted three-body problem with light pressure
M. Alvarez-Ramírez, J. K. Formiga, R. V. de Moraes +2
We study the fourth-order stability of the triangular libration points in the absence of resonance for the three-body problem when the infinitesimal mass is affected not only by gr…
Numerical evolution of general Robinson-Trautman spacetimes: code tests, wave forms and the efficiency of the gravitational wave extraction
H. P. de Oliveira, E. L. Rodrigues, J. E. F. Skea
We present an efficient numerical code based on spectral methods to integrate the field equations of general Robinson-Trautmann spacetimes. The most natural basis functions for the…
Friedmann Robertson Walker models with Conformally Coupled Massive Scalar Fields are Non-integrable
L. A. A. Coelho, J. E. F. Skea, T. J. Stuchi
In this work we use a recently developed nonintegrability theorem of Morales and Ramis to prove that the Friedmann Robertson Walker cosmological model with a conformally coupled ma…
The high temperature expansion of the classical chain
E. V. Correa Silva, Onofre Rojas, James E. F. Skea +2
We present the -expansion of the Helmholtz free energy of the classical model, with a single-ion anisotropy term and in the presence of an external magnetic field, up to o…
Active gravitational mass and the invariant characterization of Reissner-Nordstrom spacetime
L. Herrera, N. O. Santos, J. E. F. Skea
We analyse the concept of active gravitational mass for Reissner-Nordstrom spacetime in terms of scalar polynomial invariants and the Karlhede classification. We show that while th…