169 citations · 202 across the 2 of their papers we have counts for
4 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…