28 citations · 40 across the 3 of their papers we have counts for
3 papers · 1 filter
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…
Assessing the impact of bulk and shear viscosities on large scale structure formation
C. M. S. Barbosa, H. Velten, J. C. Fabris +1
It is analyzed the effects of both bulk and shear viscosities on the perturbations, relevant for structure formation in late time cosmology. It is shown that shear viscosity can be…
Viscous Cosmology
C. M. S. Barbosa, J. C. Fabris, O. F. Piattella +2
We discuss the possibility to implement a viscous cosmological model, attributing to the dark matter component a behaviour described by bulk viscosity. Since bulk viscosity implies…