10 citations · 35 across the 7 of their papers we have counts for
7 papers
Formation and Evolution of Wakes in the Spacetime Generated by a Cosmic String in Theory of Gravity
G. C. Carvalho, M. E. X. Guimarães, P. O. Mesquita +1
The formation and evolution of cosmic string wakes in the framework of a theory of gravity are investigated in this work. We consider a simple model in which baryonic matter…
Cosmic String Solution in a Born-Infeld Type Theory of Gravity
W. J. da Rocha, A. L. Naves de Oliveira, M. E. X. Guimaraes
In this work we derive an exact solution for the exterior metric of a local cosmic string in an effective theory of gravity, the so-called NDL theory, which is inspired in the Born…
Towards an hybrid compactification with a scalar-tensor global cosmic string
M. C. B. Abdalla, M. E. X. Guimaraes, J. M. Hoff da Silva
We derive a solution of the gravitational equations which leads to a braneworld scenario in six dimensions using a global cosmic string solution in a low energy effective string th…
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…
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…