4 papers
Qualitative analysis of a quasi-magnetic universe
Alan G. Cesar, Mario Novello, Eduardo Bittencourt +1
We investigate the cosmological dynamics induced by nonlinear electrodynamics in a homogeneous and isotropic universe, focusing on the role of primordial electromagnetic fields wit…
Qualitative analysis of viscous cosmology
A. G. Cesar, Mario Novello
We analyze the effect of higher order viscosity corrections in a spatially homogeneous and isotropic universe. The viscous effects are modeled by introducing a second-order term to…
An overview of field theories of gravity
Mario Novello, Júnior D. Toniato
In the general relativity theory the basic ingredient to describe gravity is the geometry, which interacts with all forms of matter and energy, and as such, the metric could be int…
Friedmann's Universe Controlled by Gauss-Bonnet Modified Gravity
Fábio dos Anjos, Mario Novello
The accepted idea that the expansion of the universe is accelerating needs, for compatibility to general relativity, the introduction of some unusual forms of matter. However, seve…