115 citations · 1.6k across the 58 of their papers we have counts for
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Dynamics and chaos in the unified scalar field cosmology II. System in a finite box
Giovanni Acquaviva, Georgios Lukes-Gerakopoulos
We revisit the global dynamics of unified dark matter cosmological models and analyze it in a new dynamical system setting. In particular, by defining a suitable set of variables w…
Spinning test-body orbiting around Schwarzschild black hole: circular dynamics and gravitational-wave fluxes
Enno Harms, Georgios Lukes-Gerakopoulos, Sebastiano Bernuzzi +1
We consider a spinning test-body in circular motion around a nonrotating black hole and analyze different prescriptions for the body's dynamics. We compare, for the first time, the…
Spinning particles moving around black holes: integrability and chaos
Georgios Lukes-Gerakopoulos
The motion of a stellar compact object around a supermassive black hole can be approximated by the motion of a spinning test particle. The equations of motion describing such syste…
The dynamics of a spinning particle in a linear in spin Hamiltonian approximation
Georgios Lukes-Gerakopoulos, Matthaios Katsanikas, Panos A. Patsis +1
We investigate for order and chaos the dynamical system of a spinning test particle of mass moving in the spacetime background of a Kerr black hole of mass M. This system is ap…
Comment on "Chaotic orbits for spinning particles in Schwarzschild spacetime"
Georgios Lukes-Gerakopoulos
The astrophysical relevance of chaos for a test particle with spin moving in Schwarzschild spacetime was the objective of \cite{Verhaaren10}. Even if the results of the study seem…