184 citations · 325 across the 8 of their papers we have counts for
4 papers · 1 filter
Matter growth in extended CDM cosmology
W. Zimdahl, H. E. S. Velten, W. C. Algoner
On the basis of a previously established scalar-tensor extension of the CDM model we develop an effective fluid approach for the matter growth function. This extended CDM (he…
Matter Perturbations in Scaling Cosmology
A. Romero Fuño, W. S. Hipólito-Ricaldi, W. Zimdahl
A suitable nonlinear interaction between dark matter with an energy density and dark energy with an energy density is known to give rise to a non-canonical scaling…
Viscous dark matter growth in (neo-)Newtonian cosmology
H. Velten, D. J. Schwarz, J. C. Fabris +1
We assume cold dark matter to possess a small bulk-viscous pressure which typically attenuates the growth of inhomogeneities. Explicit calculations, based on Eckart's theory of dis…
Viscous dark fluid Universe: a unified model of the dark sector?
W. Zimdahl, H. E. S. Velten, W. S. Hipólito-Ricaldi
The Universe is modeled as consisting of pressureless baryonic matter and a bulk viscous fluid which is supposed to represent a unified description of the dark sector. In the homog…