13 citations · 32 across the 6 of their papers we have counts for
6 papers
Contributions from Dilatonic Strings to the Flat Behaviour of the Rotational Curves in Galaxies
M. Leineker Costa, A. L. Naves de Oliveira, M. E. X. Guimaraes
We analyse the flat behaviour of the rotational curves in some galaxies in the framework of a dilatonic, current-carrying string. We determine the expression of the tangential velo…
Quantum Effects in the Spacetime of a Magnetic Flux Cosmic String
M. E. X. Guimaraes, A. L. N. Oliveira
In this work we compute the vacuum expectation values of the energy-momentum tensor and the average value of a massive, charged scalar field in the presence of a magnetic flux cosm…
Breakdown of the Mechanism of Forming Wakes by a Current-Carrying String
A. L. N. Oliveira, M. E. X. Guimaraes
In this letter, we emphasize the effect that the inclusion of a electromagnetic properties for a string brings logarithmic divergences to the accretion problem and the formation an…
Wakes in Dilatonic Current-Carrying Cosmic Strings
A. L. N. Oliveira, M. E. X. Guimaraes
In this work, we present the gravitational field generated by a cosmic string carrying a timelike current in the scalar-tensor gravities. The mechanism of formation and evolution o…
A New Version of Dirac's AEther and Its Cosmological Applications
Marcelo Carvalho, A. L. Oliveira
We propose a new formulation for the AEther of Dirac based on a lagrangian approach. We analyse how the presence of a particular self-interaction term in the lagrangian lead us to…
Dirac's AEther in Curved Spacetime-II: The Geometric Amplification of the Cosmic Magnetic Induction
Marcelo Carvalho, A. L. Oliveira, C. R. Rabaca
We search for an amplification mechanism of the seed cosmic magnetic induction by studying a new version of the Dirac's aether in a curved cosmological background. We find that an…