10.9k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
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13 papers · 2 filters
Ultrarelativistic black hole in an external electromagnetic field and gravitational waves in the Melvin universe
Marcello Ortaggio
We investigate the ultrarelativistic boost of a Schwarzschild black hole immersed in an external electromagnetic field, described by an exact solution of the Einstein-Maxwell equat…
Gravitational and electromagnetic fields near an anti-de Sitter-like infinity
Pavel Krtous, Jiri Podolsky
We analyze asymptotic structure of general gravitational and electromagnetic fields near an anti-de Sitter-like conformal infinity. Dependence of the radiative component of the fie…
Some high-frequency gravitational waves related to exact radiative spacetimes
Jiri Podolsky, Otakar Svitek
A formalism is introduced which may describe both standard linearized waves and gravitational waves in Isaacson's high-frequency limit. After emphasizing main differences between t…
Generalised Kundt waves and their physical interpretation
J. B. Griffiths, P. Docherty, J. Podolsky
We present the complete family of space-times with a non-expanding, shear-free, twist-free, geodesic principal null congruence (Kundt waves) that are of algebraic type III and for…
Toroidal Perturbations of Friedmann-Robertson-Walker Universes
Jiri Bicak, Donald Lynden-Bell, Joseph Katz
Explicit expressions are found for the axisymmetric metric perturbations of the closed, flat and open FRW universes caused by toroidal motions of the cosmic fluid. The perturbation…
Do Rotations Beyond the Cosmological Horizon Affect the Local Inertial Frame?
Jiri Bicak, Donald Lynden-Bell, Joseph Katz
If perturbations beyond the horizon have the velocities prescribed everywhere then the dragging of inertial frames near the origin is suppressed by an exponential factor. However i…
Gauge-invariant Hamiltonian dynamics of cylindrical gravitational waves
Ioannis Kouletsis, Petr Hajicek, Jiri Bicak
The model of cylindrical gravitational waves is employed to work out and check a recent proposal in Ref. [11] how a diffeomorphism-invariant Hamiltonian dynamics is to be construct…
Canonical theory of spherically symmetric spacetimes with cross-streaming null dusts
Jiri Bicak, Petr Hajicek
The Hamiltonian dynamics of two-component spherically symmetric null dust is studied with regard to the quantum theory of gravitational collapse. The components--the ingoing and ou…
Gravitational and electromagnetic fields near a de Sitter-like infinity
Pavel Krtous, Jiri Podolsky, Jiri Bicak
We present a characterization of general gravitational and electromagnetic fields near de Sitter-like conformal infinity which supplements the standard peeling behavior. This is ba…
Radiation from accelerated black holes in an anti-de Sitter universe
Jiri Podolsky, Marcello Ortaggio, Pavel Krtous
We study gravitational and electromagnetic radiation generated by uniformly accelerated charged black holes in anti-de Sitter spacetime. This is described by the C-metric exact sol…
Radiative fields in spacetimes with Minkowski and de Sitter asymptotics
J. Bicak, P. Krtous
The classical Bondi-Penrose approach to the gravitational radiation theory in asymptotically flat spacetimes is recalled and recent advances in the proofs of the existence of such…
General-covariant evolution formalism for Numerical Relativity
C. Bona, T. Ledvinka, C. Palenzuela +1
A general covariant extension of Einstein\'{}s field equations is considered with a view to Numerical Relativity applications. The basic variables are taken to be the metric tensor…
Radiation from accelerated black holes in de Sitter universe
Pavel Krtous, Jiri Podolsky
Radiative properties of gravitational and electromagnetic fields generated by uniformly accelerated charged black holes in asymptotically de Sitter spacetime are studied by analyzi…