Original title: Chaotic motion in the Johannsen-Psaltis spacetime
Authors: Zelenka, Ondřej ; Lukes-Gerakopoulos, Georgios
Document type: Papers
Conference/Event: RAGtime /17.-19./, Opava (CZ), 20151117
Year: 2017
Language: eng
Abstract: The Johannsen-Psaltis spacetime is a perturbation of the Kerr spacetime designed to avoid pathologies like naked singularities and closed timelike curves. This spacetime depends not only on the mass and the spin of the compact object, but also on extra parameters, making the spacetime deviate from Kerr. In this work we consider only the lowest order physically meaningful extra parameter. We use numerical examples to show that geodesic motion in this spacetime can exhibit chaotic behavior. We study the corresponding phase space by using Poincaré sections and rotation numbers to show chaotic behavior, and we use Lyapunov exponents to directly estimate the sensitivity to initial conditions for chaotic orbits.
Keywords: black holes; chaos; geodesic motion
Project no.: GJ17-06962Y (CEP)
Funding provider: GA ČR
Host item entry: Proceedings of RAGtime 17/19: Workshops on black holes and neutron stars, ISBN 9788075102577, ISSN 2336-5668

Institution: Astronomical Institute AS ČR (web)
Document availability information: Fulltext is available at external website.
External URL: http://proceedings.physics.cz/images/proc17/zel.pdf
Original record: http://hdl.handle.net/11104/0280092

Permalink: http://www.nusl.cz/ntk/nusl-371469


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