113 citations · 837 across the 28 of their papers we have counts for
7 papers · 1 filter
Toward reconstruction of dynamics of the Universe from distant supernovae type Ia
Marek Szydlowski, Wojciech Czaja
We demonstrate a model-independent method of estimating qualitative dynamics of an accelerating universe from observations of distant type Ia supernovae. Our method is based on the…
Constraints on a Cardassian model from SNIa data - revisited
Wlodzimierz Godlowski, Marek Szydlowski, Adam Krawiec
We discuss some observational constraints resulting only from SNIa observations, imposed on the behavior of the original flat Cardassian model, and its extension with the curvature…
Phantom cosmologies
Mariusz P. Dabrowski, Tomasz Stachowiak, Marek Szydlowski
We discuss a class of phantom () cosmological models. Except for phantom we admit various forms of standard types of matter and discuss the problem of singularities…
Stability of FRW Cosmology with Generalized Chaplygin Gas
Marek Szydlowski, Wojciech Czaja
We apply methods of dynamical systems to study the behaviour of universe dominated by the generalized Chaplygin gas. We reduce the dynamics to a 2-dimensional Hamiltonian system an…
Particle-Like Description in Quintessential Cosmology
Marek Szydlowski, Wojciech Czaja
Assuming equation of state for quintessential matter: , we analyse dynamical behaviour of the scale factor in FRW cosmologies. It is shown that its dynamics is formally eq…
Cosmological model with macroscopic spin fluid
Marek Szydlowski, Adam Krawiec
We consider a Friedmann-Robertson-Walker cosmological model with some exotic perfect fluid with spin known as the Weyssenhoff fluid. The possibility that the dark energy may be des…