23 citations · 89 across the 9 of their papers we have counts for
9 papers
Stationary massive disks around black holes: realistic equation of state and bifurcation
Wojciech Kulczycki, Patryk Mach, Edward Malec
We study stationary and axially symmetric black hole-disk systems, assuming a combination of the DD2 and Timmes-Swesty equations of state and a three-parameter family of rotation l…
On extensions of the Penrose inequality with angular momentum
Wojciech Kulczycki, Edward Malec
We numerically investigate the validity of recent modifications of the Penrose inequality that include angular momentum. Formulations expressed in terms of asymptotic mass and asym…
General-relativistic rotation laws in fluid tori around spinning black holes
Wojciech Kulczycki, Edward Malec
We obtain rotation laws for axially symmetric, selfgravitating and stationary fluids around spinning black holes. They reduce --- in the Newtonian limit --- to monomial rotation cu…
Self-gravitating perfect-fluid tori around black holes: Bifurcations, ergoregions, and geometrical properties
Wojciech Dyba, Wojciech Kulczycki, Patryk Mach
We investigate models of stationary, selfgravitating, perfect-fluid tori (disks) rotating around black holes, focusing on geometric properties of spacetime. The models are construc…
Two mass conjectures on axially symmetric black hole--disk systems
Wojciech Kulczycki, Patryk Mach, Edward Malec
We analyze stationary self-gravitating disks around spinning black holes that satisfy the recently found general-relativistic Keplerian rotation law. There is a numerical evidence…
Self-gravitating axially symmetric disks in general-relativistic rotation
Janusz Karkowski, Wojciech Kulczycki, Patryk Mach +3
We integrate numerically axially symmetric stationary Einstein equations describing self-gravitating disks around spinless black holes. The numerical scheme is based on a method de…
General-relativistic rotation: self-gravitating fluid tori in motion around black holes
Janusz Karkowski, Wojciech Kulczycki, Patryk Mach +3
We obtain from the first principles a general-relativistic Keplerian rotation law for self-gravitating disks around spinning black holes. This is an extension of a former rotation…
Axial gravitational waves in FLRW cosmology and memory effects
Wojciech Kulczycki, Edward Malec
We show initial data for gravitational axial waves, that are twice differentiable but which are not . They generate wave pulses that interact with matter in the radiation co…
Gravitational waves in Friedman-Lemaitre-Robertson-Walker cosmology, material perturbations and cosmological rotation, and the Huygens principle
Wojciech Kulczycki, Edward Malec
We analyze propagation equations for the polar modes of gravitational waves in cosmological space-times. We prove that polar gravitational waves must perturb the density and non-az…