Original title: Epicyclic oscillations of thick relativistic disks
Authors: Horák, Jiří ; Straub, O. ; Šrámková, E. ; Goluchová, K. ; Török, G.
Document type: Papers
Conference/Event: RAGtime /17.-19./, Opava (CZ), 20151117
Year: 2017
Language: eng
Abstract: We study epicyclic oscillations of thick relativistic tori with constant specific angular momentum distribution using the finite element numerical method. We have compared frequencies of the axisymmetric and non-axisymmetric modes with the analytic formulae obtained by Straub and Šrámková (2009) and Fragile et al. (2016). We have found excellent agreement in the case of axisymmetric radial epicyclic modes. In the case of the axisymmetric vertical epicyclic modes and non-axisymmetric modes in general, the analytic approximation agrees with numerical results only for tori of moderate thicknesses. Our analysis also revealed an instability of the thick constant angular momentum tori with respect to the radial epicyclic oscillation.
Keywords: accretion disks; black hole physics; oscillation
Project no.: GA17-16287S (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/hor2.pdf
Original record: http://hdl.handle.net/11104/0280063

Permalink: http://www.nusl.cz/ntk/nusl-371463


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