304 citations · 2.8k across the 107 of their papers we have counts for
13 papers · 1 filter
Dark energy FRW cosmology - dynamical system reconstruction
Marek Szydlowski, Aleksandra Kurek
We develop a simple method of dark energy reconstruction using a geometrical form of the luminosity-distance relation. In this method the FRW dynamical system with dark energy is r…
Relic gravitons from super-inflation
Jakub Mielczarek, Marek Szydlowski
The super-inflationary phase is predicted by the Loop Quantum Cosmology. In this paper we study the creation of gravitational waves during this phase. We consider the inverse volum…
Coupling constant constraints in a nonminimally coupled phantom cosmology
Marek Szydlowski, Orest Hrycyna, Aleksandra Kurek
In the paper we investigate observational constraints on coupling to gravity constant parameter using distant supernovae SNIa data, baryon oscillation peak (BOP), the cosmic mi…
Extended Quintessence with non-minimally coupled phantom scalar field
Orest Hrycyna, Marek Szydlowski
We investigate evolutional paths of an extended quintessence with a non-minimally coupled phantom scalar field to the Ricci curvature. The dynamical system methods are used to…
Constraints on oscillating dark energy models
Aleksandra Kurek, Orest Hrycyna, Marek Szydlowski
The oscillating scenario of route to Lambda was recently proposed by us arXiv:0704.1651 as an alternative to a cosmological constant in a explanation of the current accelerating un…
Testing and selection of cosmological models with corrections
Marek Szydlowski, Wlodzimierz Godlowski, Tomasz Stachowiak
In the paper we check whether the contribution of type in the Friedmann equation can be tested. We consider some astronomical tests to constrain the density parameters…
Acceleration of the Universe driven by the Casimir force
Marek Szydlowski, Wlodzimierz Godlowski
We investigate an evolutional scenario of the FRW universe with the Casimir energy scaling like . The Casimir effect is used to explain the vacuum energy differences (i…
Relic gravitons as the observable for Loop Quantum Cosmology
Jakub Mielczarek, Marek Szydlowski
In this paper we investigate tensor modes of perturbations in the universe governed by Loop Quantum Cosmology. We derive the equation for tensor modes and investigate numerically e…
Vortex in axion condensate as a dark matter halo
Jakub Mielczarek, Tomasz Stachowiak, Marek Szydlowski
We study the possibility of the vortices formation in axion condensate on the galactic scale. Such vortices can occur as a result of global rotation of the early universe. We study…
Route to Lambda in conformally coupled phantom cosmology
Orest Hrycyna, Marek Szydlowski
In this letter we investigate acceleration in the flat cosmological model with a conformally coupled phantom field and we show that acceleration is its generic feature. We reduce t…
Global dynamics of cosmological scalar fields -- Part II
Andrzej J. Maciejewski, Maria Przybylska, Tomasz Stachowiak +1
This is the second part of integrability analysis of cosmological models with scalar fields. Here, we study systems with conformal coupling, and show that apart from four cases, wh…
The LambdaCDM model on the lead -- a Bayesian cosmological models comparison
Aleksandra Kurek, Marek Szydłowski
Recent astronomical observations indicate that our Universe is undergoing a period of an accelerated expansion. While there are many cosmological models, which explain this phenome…
Constraining bouncing cosmology caused by Casimir effect
Wlodzimierz Godlowski, Marek Szydlowski, Zong-Hong Zhu
In our paper we constrain Friedman Robertson Walker (FRW) model with ``radiation-like'' contribution to the Friedmann equation against the astronomical data. We analyze the observa…