31 citations · 52 across the 6 of their papers we have counts for
6 papers
Analytical reconstruction of equivalent purely kinetic k-essence description for barotropic fluid models
Dalibor Perkovic, Hrvoje Stefancic
A novel approach to the class of cosmic barotropic fluids in which the speed of sound squared is defined as a function of the Equation of State parameter, so called mode…
Dark matter fluid constraints from galaxy rotation curves
Dalibor Perkovic, Hrvoje Stefancic
Galaxy rotation curves are considered to be convincing evidence for dark matter or some dynamically equivalent alternative mechanism. Starting only from the rotation curve data, we…
Purely kinetic k-essence description of barotropic fluid models
Dalibor Perkovic, Hrvoje Stefancic
Purely kinetic k-essence models have been shown in the literature to be a field theory equivalent of barotropic fluid models of dark energy or dark matter-dark energy unification.…
Barotropic fluid compatible parametrizations of dark energy
Dalibor Perkovic, Hrvoje Stefancic
Parametrizations of Equation of state parameter as a function of the scale factor or redshift are frequently used in dark energy modeling. The question investigated in this paper i…
Dark sector unifications: dark matter-phantom energy, dark matter -- constant dark energy, dark matter-dark energy-dark matter
Dalibor Perkovic, Hrvoje Stefancic
The paper brings a novel approach to unification of dark matter and dark energy in terms of a cosmic fluid. A model is introduced in which the cosmic fluid speed of sound squared i…
Transient dark energy, cosmological constant boundary crossing and dark energy data fits
Dalibor Perkovic, Hrvoje Stefancic
The formalism of dark energy based on modeling speed of sound as a function of equation of state parameter is elaborated. A specific model which allows detailed study of cosmologic…