Název:
Epicyclic oscillations of thick relativistic disks
Autoři:
Horák, Jiří ; Straub, O. ; Šrámková, E. ; Goluchová, K. ; Török, G. Typ dokumentu: Příspěvky z konference Konference/Akce: RAGtime /17.-19./, Opava (CZ), 20151117
Rok:
2017
Jazyk:
eng
Abstrakt: 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.
Klíčová slova:
accretion disks; black hole physics; oscillation Číslo projektu: GA17-16287S (CEP) Poskytovatel projektu: GA ČR Zdrojový dokument: Proceedings of RAGtime 17/19: Workshops on black holes and neutron stars, ISBN 9788075102577, ISSN 2336-5668