13 citations · 72 across the 8 of their papers we have counts for
4 papers · 1 filter
Evolution of the fine-structure constant in the non-linear regime
P. P. Avelino, C. J. A. P. Martins, J. Menezes +1
We study the evolution of the fine-structure constant, , induced by non-linear density perturbations in the context of the simplest class of quintessence models with a non-minim…
Cosmic strings in Bekenstein-type models
J. Menezes, P. P. Avelino, C. Santos
We study static cosmic string solutions in the context of Bekenstein-type models. We show that there is a class of models of this type for which the classical Nielsen-Olesen vortex…
Topological Defects in Contracting Universes
P. P. Avelino, C. J. A. P. Martins, C. Santos +1
We study the behaviour and consequences of cosmic string networks in contracting universes. They approximately behave during the collapse phase as a radiation fluids. Scaling solut…
Topological defects: A problem for cyclic universes?
P. P. Avelino, C. J. A. P. Martins, C. Santos +1
We study the behaviour of cosmic string networks in contracting universes, and discuss some of their possible consequences. We note that there is a fundamental time asymmetry betwe…