104 citations · 385 across the 11 of their papers we have counts for
11 papers
Equivalence between generalized phenomenological schemes for the interaction of cosmological fluids: applications to arbitrary linear barotropic fluids and vacuum decay
M. R. G. Maia, N. Pires, H. S. Gimenes
Interactions between cosmic fluids may appear in many cosmological scenarios that go far beyond the usually studied energy exchange in the dark sector. In the absence of known micr…
Coupling dark-baryonic matter density profile for vacuum decay scenarios
H. T. C. M. Souza, N. Pires, F. E. M. Costa +2
The cosmological consequences of an interacting model in which vacuum decay law is deducted from the effect that vacuum decay has on the dark matter evolution are investigated. Her…
Cosmographic constraints on a class of Palatini f(R) gravity
N. Pires, J. Santos, J. S. Alcaniz
Modified gravity, known as gravity, has presently been applied to Cosmology as a realistic alternative to dark energy. For this kind of gravity the expansion of the Universe…
Current lookback time-redshift bounds on dark energy
M. A. Dantas, J. S. Alcaniz, N. Pires
We investigate observational constraints on dark energy models from lookback time (LT) estimates of 32 old passive galaxies distributed over the redshift interval $0.11 \leq z \leq…
Latest supernovae constraints on f(R) cosmologies
J. Santos, J. S. Alcaniz, F. C. Carvalho +1
A class of modified gravity, known as -gravity, has presently been applied to Cosmology as a realistic alternative to dark energy. In this paper we use the most recent Type-I…
Lookback time bounds from energy conditions
J. Santos, J. S. Alcaniz, M. J. Reboucas +1
In general relativity, the energy conditions are invoked to restrict general energy-momentum tensors on physical grounds. We show that in the standard Friedmann-Lemaitre-Robertson-…