189 citations · 464 across the 8 of their papers we have counts for
8 papers
Observational constraints on Rastall's cosmology
C. E. M. Batista, J. C. Fabris, O. F. Piattella +1
Rastall's theory is a modification of General Relativity, based on the non-conservation of the stress-energy tensor. The latter is encoded in a parameter such that resto…
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…
Finite-time singularities in f(R, T) gravity and the effect of conformal anomaly
M. J. S. Houndjo, C. E. M. Batista, J. P. Campos +1
We investigate gravity models ( is the curvature scalar and is the trace of the stress-energy tensor of ordinary matter) that are able to reproduce the four known t…
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…
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.…
Power-law solutions and accelerated expansion in scalar-tensor theories
C. E. M. Batista, W. Zimdahl
We find exact power-law solutions for scalar-tensor theories and clarify the conditions under which they can account for an accelerated expansion of the Universe. These solutions h…