189 citations · 954 across the 20 of their papers we have counts for
7 papers · 1 filter
Rastall cosmology
J. C. Fabris, O. F. Piattella, D. C. Rodrigues +2
We review the difficulties of the generalized Chaplygin gas model to fit observational data, due to the tension between background and perturbative tests. We argue that such issues…
Scalar models for the unification of the dark sector
Mahamadou H. Daouda, Julio C. Fabris, Oliver F. Piattella
We review the difficulties of the generalized Chaplygin gas model to fit observational data, due to the tension between background and perturbative tests. We argue that such issues…
Rastall Cosmology and the ΛCDM Model
Carlos E. M. Batista, Mahamadou H. Daouda, Júlio C. Fabris +2
Rastall's theory is based on the non-conservation of the energy-momentum tensor. We show that, in this theory, if we introduce a two-fluid model, one component representing vacuum…
Note on the Evolution of the Gravitational Potential in Rastall Scalar Field Theories
J. C. Fabris, M. Hamani Daouda, O. F. Piattella
We investigate the evolution of the gravitational potential in Rastall scalar field theories. In a single component model a consistent perturbation theory, formulated in the newton…
New Static Solutions in f(T) Theory
M. Hamani Daouda, Manuel E. Rodrigues, M. J. S. Houndjo
We consider the equations of motion of an anisotropic space-time in theory, where is the torsion. New spherically symmetric solutions of black holes and wormholes are ob…
Scalar models for the generalized Chaplygin gas and the structure formation constraints
J. C. Fabris, T. C. C. Guio, M. Hamani Daouda +1
The generalized Chaplygin gas model represents an attempt to unify dark matter and dark energy. It is characterized by a fluid with an equation of state . It can be ob…
Testing the Rastall's theory using matter power spectrum
C. E. M. Batista, J. C. Fabris, M. Hamani Daouda
The Rastall's theory is a modification of the General Relativity theory leading to a different expression for the conservation law in the matter sector compared with the usual one.…