Zobrazeno 1 - 10
of 36
pro vyhledávání: '"Kulczycki, Wojciech"'
Publikováno v:
Phys. Rev. D 104, 024005 (2021)
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 laws. There exist two branches of solutions that are shown to bifurcate
Externí odkaz:
http://arxiv.org/abs/2103.15701
Autor:
Kulczycki, Wojciech, Malec, Edward
Publikováno v:
Phys. Rev. D 103, 064025 (2021)
We numerically investigate the validity of recent modifications of the Penrose inequality that include angular momentum. Formulations expressed in terms of asymptotic mass and asymptotic angular momentum are contradicted. We analyzed numerical soluti
Externí odkaz:
http://arxiv.org/abs/2010.15715
Autor:
Kulczycki, Wojciech, Malec, Edward
Publikováno v:
Phys. Rev. D 101, 084016 (2020)
We obtain rotation laws for axially symmetric, selfgravitating and stationary fluids around spinning black holes. They reduce --- in the Newtonian limit --- to monomial rotation curves. For spinless black hole, one obtains in the first post-Newtonian
Externí odkaz:
http://arxiv.org/abs/2001.07052
Publikováno v:
Phys. Rev. D 101, 044036 (2020)
We investigate models of stationary, selfgravitating, perfect-fluid tori (disks) rotating around black holes, focusing on geometric properties of spacetime. The models are constructed within the general-relativistic hydrodynamics, assuming differenti
Externí odkaz:
http://arxiv.org/abs/1911.01920
Publikováno v:
Phys. Rev. D 99, 024004 (2019)
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 that the angular velocity, circumferential radius and angular momenta
Externí odkaz:
http://arxiv.org/abs/1810.12134
Autor:
Karkowski, Janusz, Kulczycki, Wojciech, Mach, Patryk, Malec, Edward, Odrzywolek, Andrzej, Pirog, Michal
Publikováno v:
Phys. Rev. D 97, 104017 (2018)
We integrate numerically axially symmetric stationary Einstein equations describing self-gravitating disks around spinless black holes. The numerical scheme is based on a method developed by Shibata, but contains important new ingredients. We derive
Externí odkaz:
http://arxiv.org/abs/1802.02848
Autor:
Karkowski, Janusz, Kulczycki, Wojciech, Mach, Patryk, Malec, Edward, Odrzywolek, Andrzej, Pirog, Michal
Publikováno v:
Phys. Rev. D 97, 104034 (2018)
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 law that was designed mainly for toroids around spin-less black holes.
Externí odkaz:
http://arxiv.org/abs/1712.05673
Autor:
Kulczycki, Wojciech, Malec, Edward
Publikováno v:
Phys. Rev. D 96, 063523 (2017)
We show initial data for gravitational axial waves, that are twice differentiable but which are not $C^{2}$. They generate wave pulses that interact with matter in the radiation cosmological era. This forces the radiation matter to rotate. This rotat
Externí odkaz:
http://arxiv.org/abs/1706.09620
Autor:
Kulczycki, Wojciech, Malec, Edward
Publikováno v:
Class. Quantum Grav. 34, 135014 (2017)
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-azimuthal components of the velocity of material medium of the Friedman-
Externí odkaz:
http://arxiv.org/abs/1603.01763
Publikováno v:
Sport, Business and Management: An International Journal, 2017, Vol. 7, Issue 5, pp. 497-514.
Externí odkaz:
http://www.emeraldinsight.com/doi/10.1108/SBM-10-2016-0065
