304 citations · 2.8k across the 107 of their papers we have counts for
11 papers · 1 filter
Towards testing interacting cosmology by distant type Ia supernovae
Marek Szydlowski, Tomasz Stachowiak, Radoslaw Wojtak
We investigate the possibility of testing cosmological models with interaction between matter and energy sector. We assume the standard FRW model while the so called energy conserv…
Can brane dark energy model be probed observationally by distant supernovae?
Marek Szydlowski, Wlodzimierz Godlowski
The recent astronomical measurements of distant supernovae as well as other observations indicate that our universe is presently accelerating. There are different proposals for the…
Which cosmological models -- with dark energy or modified FRW dynamics?
Marek Szydlowski, Wlodzimierz Godlowski
Recent measurements of distant type Ia supernovae (SNIa) as well as other observations indicate that our universe is in accelerating phase of expansion. In principle there are two…
Non-integrability of density perturbations in the FRW universe
Tomasz Stachowiak, Marek Szydlowski, Andrzej J. Maciejewski
We investigate the evolution equation of linear density perturbations in the Friedmann-Robertson-Walker universe with matter, radiation and the cosmological constant. The concept o…
Different faces of chaos in FRW models with scalar fields -- geometrical point of view
Orest Hrycyna, Marek Szydlowski
FRW cosmologies with conformally coupled scalar fields are investigated in a geometrical way by the means of geodesics of the Jacobi metric. In this model of dynamics, trajectories…
Dynamical dark energy models -- dynamical system approach
Marek Szydlowski, Orest Hrycyna
We study the Friedmann-Robertson-Walker model with dynamical dark energy modelled in terms of the equation of state in which the coefficient is pa…
Equation of state for Universe from similarity symmetries
Marek Szydlowski, Wlodzimierz Godlowski, Radoslaw Wojtak
In this paper we proposed to use the group of analysis of symmetries of the dynamical system to describe the evolution of the Universe. This methods is used in searching for the un…
Can the initial singularity be detected by cosmological tests?
Marek Szydlowski, Wlodzimierz Godlowski, Adam Krawiec +1
In the present paper we raise the question whether initial cosmological singularity can be proved from the cosmological tests. The classical general relativity predict the existenc…
Some remarks on the angular momenta of galaxies, their clusters and superclusters
Wlodzimierz Godlowski, Marek Szydlowski, Piotr Flin
We discuss the relation between angular momenta and masses of galaxy structures base on the Li model of the universe with global rotation. In our previous paper (Godłowski et al 20…
Complementary constraints on non-standard cosmological models from CMB and BBN
Adam Krawiec, Marek Szydlowski, Wlodzimierz Godlowski
We study metric-affine gravity (MAG) inspired cosmological models. Those models were statistically estimated using the SNIa data. We also use the cosmic microwave background observ…
Cosmological model with energy transfer
Marek Szydlowski
The observations of SNIa suggest that we live in the acceleration epoch when the densities of the cosmological constant term and matter are almost equal. This leads to the cosmic c…