HORÁK, Jiří, Odelle STRAUB, Eva ŠRÁMKOVÁ, Kateřina GOLUCHOVÁ and Gabriel TÖRÖK. Epicyclic oscillations of thick relativistic disks. In Z. Stuchlík, G. Török a V. Karas. Proceedings of RAGtime 17–19: Workshops on black holes and neutron stars, 17–19/23–26 Oct., 1–5 Nov. 2015/2016/2017, Opava, Czech Republic. 1st ed. Opava (Česká republika): Slezská univerzita v Opavě, Filozoficko–přírodovědecká fakulta v Opavě, Ústav fyziky, 2017, p. 47-59. ISBN 978-80-7510-256-0.
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Basic information
Original name Epicyclic oscillations of thick relativistic disks
Authors HORÁK, Jiří (203 Czech Republic), Odelle STRAUB (756 Switzerland), Eva ŠRÁMKOVÁ (203 Czech Republic, guarantor, belonging to the institution), Kateřina GOLUCHOVÁ (203 Czech Republic, belonging to the institution) and Gabriel TÖRÖK (203 Czech Republic, belonging to the institution).
Edition 1. vyd. Opava (Česká republika), Proceedings of RAGtime 17–19: Workshops on black holes and neutron stars, 17–19/23–26 Oct., 1–5 Nov. 2015/2016/2017, Opava, Czech Republic, p. 47-59, 13 pp. 2017.
Publisher Slezská univerzita v Opavě, Filozoficko–přírodovědecká fakulta v Opavě, Ústav fyziky
Other information
Original language English
Type of outcome Proceedings paper
Field of Study 10308 Astronomy
Country of publisher Czech Republic
Confidentiality degree is not subject to a state or trade secret
Publication form printed version "print"
WWW RAGtime 17-19
RIV identification code RIV/47813059:19240/17:A0000040
Organization Filozoficko-přírodovědecká fakulta – Slezská univerzita v Opavě – Repository
ISBN 978-80-7510-256-0
ISSN 2336-5668
Keywords in English black hole physics; accretion disks; oscillations; FEM method
Tags GA17-16287S, RAGtime 17-19, ÚF
Tags International impact, Reviewed
Links GA17-16287S, research and development project.
Changed by Changed by: Jan Hladík, učo 1305. Changed: 6/4/2018 17:37.
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 oscillations.
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