39 citations · 72 across the 5 of their papers we have counts for
5 papers
Non-homogeneity-driven Universe acceleration
Izabela Jakacka, Jerzy Stelmach
Class of spherically symmetric Stephani cosmological models is examined in the context of evolution type. It is assumed that the equation of state at the symmetry center of the mod…
Observable Quantities in Cosmological Models with Strings
Mariusz P. Dabrowski, Jerzy Stelmach
The Friedman equation for the universe with arbitrary curvature , filled with mutually noninteracting pressureless dust, radiation, cosmological constant, and strin…
Can the Stephani model be an alternative to FRW accelerating models?
Wlodzimierz Godlowski, Jerzy Stelmach, Marek Szydlowski
A class of Stephani cosmological models as a prototype of non-homogeneous universe is considered. The non-homogeneity can lead to accelerated evolution which is now observed from t…
Horizon problem in a closed universe dominated by fluid with negative pressure
Jerzy Stelmach
We discuss the horizon problem in a universe dominated by fluid with negative pressure. We show that for generally accepted value of nonrelativistic matter energy density parameter…
Perturbation growth and cosmic microwave background anisotropies in the string-like matter dominated universe
Jerzy Stelmach
It is well known that the -term is a very good candidate for the smooth component of the universe since it resolves the so-called ``-problem'' giving, at the same time, suffi…