60 citations · 93 across the 4 of their papers we have counts for
9 papers · 1 filter
Friedmann branes with variable tension
László Á. Gergely
We introduce brane-worlds with non-constant tension, strenghtening the analogy with fluid membranes, which exhibit a temperature-dependence according to the empirical law establish…
On the validity of the 5-dimensional Birkhoff theorem: The tale of an exceptional case
Zoltán Keresztes, László Á. Gergely
The 5-dimensional (5d) Birkhoff theorem gives the class of 5d vacuum space-times containing spatial hypersurfaces with cosmological symmetries. This theorem is violated by the 5d v…
Gravitational dynamics in s+1+1 dimensions II. Hamiltonian theory
Zoltán Kovács, László Á. Gergely
We develop a Hamiltonian formalism of brane-world gravity, which singles out two preferred, mutually orthogonal directions. One is a unit twist-free field of spatial vectors with i…
Generalized true- and eccentric-anomaly parametrizations for the perturbed Kepler motion
László Á. Gergely, Zoltán I. Perjés, Mátyás Vasúth
The true- and eccentric-anomaly parametrizations of the Kepler motion are generalized to quasiperiodic orbits by considering perturbations of the radial part of kinetic energy as a…
Rotating incompressible perfect fluid source of the NUT metric
László Á. Gergely, Zoltán Perjés, Gyula Fodor
A global solution of the Einstein equations is given, consisting of a perfect fluid interior and a vacuum exterior. The rigidly rotating and incompressible perfect fluid is matched…
Spin effects in radiating compact binaries
László Á. Gergely, Zoltán Perjés, Mátyás Vasúth
We review and summarize our results concerning the influence of the spins of a compact binary system on the motion of the binary and on its gravitational reaction. We describe brie…