485 citations · 1.3k across the 32 of their papers we have counts for
32 papers
The problem of ultracompact rotating gravastars
Mieszko Rutkowski, Andrzej Rostworowski
A number of authors provided arguments that a rotating gravastar is a good candidate for a source of the Kerr metric. These arguments were based on the second order perturbation an…
AdS instability: resonant system for gravitational perturbations of AdS in the cohomogeneity-two biaxial Bianchi IX ansatz
Dominika Hunik-Kostyra, Andrzej Rostworowski
We consider five-dimensional, vacuum Einstein equations with negative cosmological constant within cohomogenity-two biaxial Bianchi IX ansatz. This model allows to investigate the…
Master equations and stability of Einstein-Maxwell-scalar black holes
Aron Jansen, Andrzej Rostworowski, Mieszko Rutkowski
We derive master equations for linear perturbations in Einstein-Maxwell-scalar theory, for any spacetime dimension D and any background with a maximally symmetric n = (D - 2)-dimen…
Cosmological perturbations in the Regge-Wheeler formalism
Andrzej Rostworowski
We study linear perturbations of the Friedmann-Lemaitre-Robertson-Walker (FLRW) cosmological model in the Regge-Wheeler formalism which is a standard framework to study perturbatio…
Gravitational turbulent instability of AdS
Piotr Bizoń, Andrzej Rostworowski
We consider the problem of stability of anti-de Sitter spacetime in five dimensions under small purely gravitational perturbations satisfying the cohomogeneity-two biaxial Bianchi…
Towards a theory of nonlinear gravitational waves: a systematic approach to nonlinear gravitational perturbations in vacuum
Andrzej Rostworowski
We present a systematic and robust approach to nonlinear gravitational perturbations of vacuum spacetimes. This approach provides a basis for a theory of nonlinear gravitational wa…