16 citations · 61 across the 14 of their papers we have counts for
5 papers · 1 filter
Second-order dust perturbations of the non-flat FLRW model with the positive cosmological constant
Szymon Sikora
In this paper, a specific solution to the second-order cosmological perturbation theory is given. Perturbations are performed around any FLRW spacetime filled with dust and with a…
Example of cross-polarized standing gravitational waves
Krzysztof Głód, Szymon Sikora, Sebastian J. Szybka
We use a cosmological counterpart of the cylindrical Halilsoy solution to illustrate properties of cross-polarized standing gravitational waves.
Construction of the cosmological model with periodically distributed inhomogeneities with growing amplitude
Szymon Sikora, Krzysztof Głód
We construct an approximate solution to the cosmological perturbation theory around Einstein-de Sitter background up to the fourth-order perturbations. This could be done with the…
Perturbatively constructed cosmological model with periodically distributed dust inhomogeneities
Szymon Sikora, Krzysztof Głód
We constructed a simple cosmological model which approximates the Einstein-de Sitter background with periodically distributed dust inhomogeneities. By taking the metric as a power…
Example of an inhomogeneous cosmological model in the context of backreaction
Szymon Sikora, Krzysztof Głód
In this article, we present an example of an inhomogeneous cosmological model, which is inspired by the linear perturbation theory. The metric of this model can be described as the…