75 citations · 233 across the 25 of their papers we have counts for
4 papers · 1 filter
Dark energy with zero pressure: Accelerated expansion and large scale structure in action-dependent Lagrangian theories
Thiago R. P. Caramês, H. Velten, J. C. Fabris +1
We develop a cosmological model based on action-dependent Lagrangian theories. The main feature here is the nonconservation of the energy momentum tensor due to the nontrivial geom…
Modified gravity versus shear viscosity: imprints on the scalar matter perturbations
C. M. S. Barbosa, H. Velten, J. C. Fabris +1
Cosmological scalar perturbation theory studied in the Newtonian gauge depends on two potentials and . In General Relativity (GR) they must coincide () in the absence o…
Degeneracy between nonadiabatic dark energy models and CDM: ISW effect and the cross correlation of CMB with galaxy clustering data
Hermano Velten, Raquel Emy Fazolo, Rodrigo von Marttens +1
As recently pointed out in Ref. [Phys.\ Rev.\ D {\bf 96}, 8, 083502 (2017)] the evolution of the linear matter perturbations in nonadiabatic dynamical dark energy models is almost…
Nonconservative traceless type gravity
Mahamadou Daouda, J. C. Fabris, A. M. Oliveira +2
Extensions of the gravity theory in order to obtain traceless field equations have been widely considered in the literature. The leading example of such class of theories is the un…