Epicyclic oscillations of thick relativistic disks

D 2017

Epicyclic oscillations of thick relativistic disks

HORÁK, Jiří, Odelle STRAUB, Eva ŠRÁMKOVÁ, Kateřina GOLUCHOVÁ, Gabriel TÖRÖK et. al.

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

Language

English

Type of outcome

Stať ve sborníku

Field of Study

10308 Astronomy

Country of publisher

Czech Republic

Confidentiality degree

není předmětem státního či obchodního tajemství

Publication form

printed version "print"

References:

RAGtime 17-19

RIV identification code

RIV/47813059:19240/17:A0000040

Organization unit

Faculty of Philosophy and Science in Opava

ISBN

978-80-7510-256-0

ISSN

Keywords in English

black hole physics; accretion disks; oscillations; FEM method

Links

GA17-16287S, research and development project.

Změněno: 6/4/2018 17:37, RNDr. Jan Hladík, Ph.D.

Abstract

V originále

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.

Citovat

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.

@inproceedings{29923,
   author = {Horák, Jiří and Straub, Odelle and Šrámková, Eva and Goluchová, Kateřina and Török, Gabriel},
   address = {Opava (Česká republika)},
   booktitle = {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},
   edition = {1.},
   editor = {Z. Stuchlík, G. Török a V. Karas},
   keywords = {black hole physics; accretion disks; oscillations; FEM method},
   howpublished = {tištěná verze "print"},
   language = {eng},
   location = {Opava (Česká republika)},
   isbn = {978-80-7510-256-0},
   pages = {47-59},
   publisher = {Slezská univerzita v Opavě, Filozoficko–přírodovědecká fakulta v Opavě, Ústav fyziky},
   title = {Epicyclic oscillations of thick relativistic disks},
   url = {http://proceedings.physics.cz/index.php/ragtime-book/proceedings-of-ragtime-17-19},
   year = {2017}
}

TY  - JOUR
ID  - 29923
AU  - Horák, Jiří - Straub, Odelle - Šrámková, Eva - Goluchová, Kateřina - Török, Gabriel
PY  - 2017
TI  - Epicyclic oscillations of thick relativistic disks
PB  - Slezská univerzita v Opavě, Filozoficko–přírodovědecká fakulta v Opavě, Ústav fyziky
CY  - Opava (Česká republika)
SN  - 9788075102560
KW  - black hole physics
KW  - accretion disks
KW  - oscillations
KW  - FEM method
UR  - http://proceedings.physics.cz/index.php/ragtime-book/proceedings-of-ragtime-17-19
L2  - http://proceedings.physics.cz/index.php/ragtime-book/proceedings-of-ragtime-17-19
N2  - 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.
ER  -

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. \textit{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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