237 citations · 744 across the 25 of their papers we have counts for
6 papers · 1 filter
Dark Interactions and Cosmological Fine-Tuning
Miguel Quartin, Mauricio O. Calvao, Sergio E. Joras +2
Cosmological models involving an interaction between dark matter and dark energy have been proposed in order to solve the so-called coincidence problem. Different forms of coupling…
Cosmology, Thermodynamics and Matter Creation
J. A. S. Lima, M. O. Calvao, I. Waga
Several approaches to the matter creation problem in the context of cosmological models are summarily reviewed. A covariant formulation of the general relativistic imperfect simple…
Relativistic Effects of our Galaxy's Motion on Circles-in-the-sky
M. O. Calvao, G. I. Gomero, B. Mota +1
We study the geometric effects of our galaxy's peculiar motion on the circles-in-the-sky. We show that the shape of these circles-in-the-sky remains circular, as detected by a loca…
Entropy perturbations in quartessence Chaplygin models
R. R. R. Reis, I. Waga, M. O. Calvao +1
We show that entropy perturbations can eliminate instabilities and oscillations, in the mass power spectrum of the quartessence Chaplygin models. Our results enlarge the current pa…
Probing the dark energy with quasar clustering
M. O. Calvao, J. R. T. de Mello Neto, I. Waga
We show, through Monte Carlo simulations, that the Alcock-Paczynski test, as applied to quasar clustering, is a powerful tool to probe the cosmological density and equation of stat…
On Local Approximations to the Nonlinear Evolution of Large-Scale Structure
Martin Makler, Takeshi Kodama, Mauricio O. Calvao
We present a comparative analysis of several methods, known as local Lagrangian approximations, which are aimed to the description of the nonlinear evolution of large-scale structu…