J 2009

Epicyclic oscillations of non-slender fluid tori around Kerr black holes

ŠRÁMKOVÁ, Eva

Basic information

Original name

Epicyclic oscillations of non-slender fluid tori around Kerr black holes

Authors

ŠRÁMKOVÁ, Eva

Edition

Classical and Quantum Gravity, GB - Spojené království Velké Británie a, 2009, 0264-9381

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10308 Astronomy

Confidentiality degree

není předmětem státního či obchodního tajemství

Organization unit

Faculty of Philosophy and Science in Opava

UT WoS

000263493200012

Keywords in English

QUASI-PERIODIC OSCILLATIONS, INTEGRATED RELATIVISTIC TORI, THICK ACCRETION DISCS, AXISYMMETRICAL MODES, ANGULAR-MOMENTUM, SPACE-TIME, DISKS, DISKOSEISMOLOGY, EXCITATION, STABILITY

Tags

UF

Tags

International impact, Reviewed

Links

LC06014, research and development project.
Změněno: 14/12/2020 11:52, Mgr. Pavlína Jalůvková

Abstract

V originále

Considering epicyclic oscillations of pressure-supported perfect fluid tori orbiting Kerr black holes we examine non-geodesic (pressure) effects on the epicyclic modes properties. Using a perturbation method we derive fully general relativistic formulaefor eigenfunctions and eigenfrequencies of the radial and vertical epicyclic modes of a slightly non-slender, constant specific angular momentum torus up to second-order accuracy with respect to the torus thickness. The behaviour of the axisymmetric andlowest-order (m = +/- 1) non-axisymmetric epicyclic modes is investigated. For an arbitrary black hole spin we find that, in comparison with the (axisymmetric) epicyclic frequencies of free test particles, non-slender tori receive negative pressure corrections and thus exhibit lower frequencies.
Displayed: 25/12/2024 07:26