142 citations · 266 across the 8 of their papers we have counts for
8 papers
Cosmic voids in modified gravity scenarios
E L D Perico, R Voivodic, M Lima +1
Modified gravity (MG) theories aim to reproduce the observed acceleration of the Universe by reducing the dark sector while simultaneously recovering General Relativity (GR) within…
The Arrow of Time in the collapse of collisionless self-gravitating systems: non-validity of the Vlasov-Poisson equation during violent relaxation
Leandro Beraldo e Silva, Walter de Siqueira Pedra, Laerte Sodré +2
The collapse of a collisionless self-gravitating system, with the fast achievement of a quasi-stationary state, is driven by violent relaxation, with a typical particle interacting…
Running Vacuum Cosmological Models: Linear Scalar Perturbations
E. L. D. Perico, D. A. Tamayo
In cosmology, phenomenologically motivated expressions for running vacuum are commonly parametrized as linear functions or . Such kind of models assume an equation o…
Decaying Vacuum Inflationary Cosmologies: A Complete Scenario Including Curvature Effects
J. A. S. Lima, E. L. D. Perico, G. J. M. Zilioti
We propose a large class of nonsingular cosmologies of arbitrary spatial curvature whose cosmic history is determined by a primeval dynamical -term. For all values of the cur…
Complete Cosmic History with a dynamical Lambda(H) term
E. L. D. Perico, J. A. S. Lima, Spyros Basilakos +1
In the present mainstream cosmology, matter and spacetime emerged from a singularity and evolved through four distinct periods: early inflation, radiation, dark matter and late-tim…
Black Hole Formation with an Interacting Vacuum Energy Density
M. Campos, J. A. S. Lima
We discuss the gravitational collapse of a spherically symmetric massive core of a star in which the fluid component is interacting with a growing vacuum energy density. The influe…
Reproducing neutrino effects on the matter power spectrum through a degenerate Fermi gas approach
E. L. D. Perico, Alex E. Bernardini
Modifications on the predictions about the matter power spectrum based on the hypothesis of a tiny contribution from a degenerate Fermi gas (DFG) test-fluid to some dominant cosmol…
Degenerate Fermi gas perturbations at standard background cosmology
Alex E. Bernardini, E. L. D. Perico
The hypothesis of a tiny fraction of the cosmic inventory evolving cosmologically as a degenerate Fermi gas test fluid at some dominant cosmological background is investigated. Our…