135 citations · 1.4k across the 81 of their papers we have counts for
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Isotropization in Bianchi type-I cosmological model with fermions and bosons interacting via Yukawa potential
M. O. Ribas, L. L. Samojeden, F. P. Devecchi +1
In this work we investigate a model for the early Universe in a Bianchi type-I metric, where the sources of the gravitational field are a fermionic and a bosonic field, interacting…
Analysis of Jeans instability from the Boltzmann equation
Gilberto M. Kremer
The dynamics of self-gravitating fluids is analyzed within the framework of a collisionless Boltzmann equation in the presence of gravitational fields and Poisson equation. Two cas…
Chaplygin Gas of Tachyon Nature Imposed by Symmetry and Constrained via H(z) Data
Lucas Gardai Collodel, Gilberto Medeiros Kremer
An action of general form is proposed for a Universe containing matter, radiation and dark energy. The latter is interpreted as a tachyon field non-minimally coupled to the scalar…
Analysis of instability of systems composed by dark and baryonic matter
Gilberto M. Kremer, Raíla André
In this work the dynamics of self-gravitating systems composed by dark and baryonic matter is analyzed. Searching for a description of this dynamics, a system of collisionless Bolt…
Mixtures of relativistic gases in gravitational fields: combined Chapman-Enskog and Grad method and the Onsager relations
Valdemar Moratto, Gilberto M. Kremer
In this work we study a r-species mixture of gases within the relativistic kinetic theory point of view. We use the relativistic covariant full Boltzmann equation and we incorporat…