TY - GEN TI - Chaotic motion in the Johannsen-Psaltis spacetime T3 - RAGtime /17.-19./ AU - Zelenka, Ondřej AB - 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. SN - 2336-5668 SN - 9788075102577 UR - http://www.nusl.cz/ntk/nusl-371469 UR - http://hdl.handle.net/11104/0280092 A2 - Lukes-Gerakopoulos, Georgios LA - eng KW - geodesic motion KW - chaos KW - black holes PY - 2017 PB - Astronomický ústav, Fričova 298, 251 65 Ondřejov, http://www.asu.cas.cz/ ER -