260 citations · 860 across the 21 of their papers we have counts for
8 papers · 1 filter
The unphysical character of dark energy fluids
Ronaldo C. Duarte, Edésio M. Barboza, Everton M. C. Abreu +1
It is well known that, in the context of general relativity, an unknown kind of matter that must violate the strong energy condition is required to explain the current accelerated…
Constraints on kinematic parameters at
C. Rodrigues Filho, Edésio M. Barboza
The standard cosmographic approach consists in performing a series expansion of a cosmological observable around and then using the data to constrain the cosmographic (or kin…
Jeans instability criterion from the viewpoint of non-gaussian statistics
Everton M. C. Abreu, Jorge Ananias Neto, Edesio M. Barboza +1
In this Letter we have derived the Jeans length in the context of the Kaniadakis statistics. We have compared this result with the Jeans length obtained in the non-extensive Tsalli…
Dark matter-dark energy interaction for a time-dependent equation of state
Rafael C. Nunes, Edésio M. Barboza
In this work we investigate the interaction between dark matter and dark energy for a coupling that obeys the Wang-Meng decaying law, , and the Barbo…
Scalar field description of a parametric model of dark energy
E. M. Barboza, J. S. Alcaniz, B. Santos
We investigate theoretical and observational aspects of a time-dependent parameterization for the dark energy equation of state (EoS) , which is a well behaved function of th…
Probing the time dependence of dark energy
E. M. Barboza, J. S. Alcaniz
A new method to investigate a possible time-dependence of the dark energy equation of state is proposed. We apply this methodology to two of the most recent data sets of type I…
Cosmology with interaction in the dark sector
F. E. M. Costa, E. M. Barboza, J. S. Alcaniz
Unless some unknown symmetry in Nature prevents or suppresses a non-minimal coupling in the dark sector, the dark energy field may interact with the pressureless component of dark…
A generalized equation of state for dark energy
E. M. Barboza, J. S. Alcaniz, Zong-Hong Zhu +1
A generalized parameterization for the dark energy equation of state (EoS) is proposed and some of its cosmological consequences are investigated. We show that in the limi…