D 2006

Humpy LNRF-velocity profiles in accretion discs orbiting rapidly rotating Kerr black holes: a possible relation to QPOs

SLANÝ, Petr, Zdeněk STUCHLÍK and Gabriel TÖRÖK

Basic information

Original name

Humpy LNRF-velocity profiles in accretion discs orbiting rapidly rotating Kerr black holes: a possible relation to QPOs

Authors

SLANÝ, Petr, Zdeněk STUCHLÍK and Gabriel TÖRÖK

Edition

Italy, Proceedings of Science, p. 1-5, 5 pp. 2006

Publisher

International School for Advanced Studies

Other information

Language

English

Type of outcome

Stať ve sborníku

Field of Study

10308 Astronomy

Confidentiality degree

není předmětem státního či obchodního tajemství

Organization unit

Faculty of Philosophy and Science in Opava

DOI

http://dx.doi.org/10.22323/1.033.0095

Keywords in English

accretion discs, black holes, relativity, instabilities

Tags

, MSM4781305903, sbornik

Tags

International impact

Links

MSM4781305903, plan (intention).
Změněno: 3/12/2020 13:29, Mgr. Pavlína Jalůvková

Abstract

V originále

Change of sign of the velocity gradient (mesured with respect to locally non-rotating frames) has been found for accretion discs orbiting rapidly rotating Kerr black holes with spin a>0.9953 for Keplerian discs and a>0.99979 for marginally stable thick discs. Such ``humpy''orbital velocity profiles occur close to but above the marginally stable circular geodesic of the black hole spacetimes. The maximal positive rate of change of the orbital velocity in terms of the proper radial distance introduces a locally defined critical frequency characterizing any processes in the disc capable to excite possible oscillations connected with the velocity hump.
Displayed: 25/12/2024 10:24