115 citations · 274 across the 5 of their papers we have counts for
5 papers
Testing the existence of regions of stable orbits at small radii around black hole candidates
Cosimo Bambi, Georgios Lukes-Gerakopoulos
Black hole candidates in X-ray binary systems and at the centers of galaxies are expected to be the Kerr black holes of General Relativity, but the actual nature of these objects h…
The non-integrability of the Zipoy-Voorhees metric
Georgios Lukes-Gerakopoulos
The low frequency gravitational wave detectors like eLISA/NGO will give us the opportunity to test whether the supermassive compact objects lying at the centers of galaxies are ind…
A Symmetric Integrator for non-integrable Hamiltonian Relativistic Systems
Jonathan Seyrich, Georgios Lukes-Gerakopoulos
By combining a standard symmetric, symplectic integrator with a new step size controller, we provide an integration scheme that is symmetric, reversible and conserves the values of…
How to observe a non-Kerr spacetime
Theocharis A. Apostolatos, Georgios Lukes-Gerakopoulos, George Contopoulos
We present a generic criterion which can be used in gravitational-wave data analysis to distinguish an extreme-mass-ratio inspiral into a Kerr background spacetime from one into a…
Dynamics and chaos in the unified scalar field Cosmology
Georgios Lukes-Gerakopoulos, Spyros Basilakos, George Contopoulos
We study the dynamics of the closed scalar field FRW cosmological models in the framework of the so called Unified Dark Matter (UDM) scenario. Performing a theoretical as well as a…