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

Published online by Cambridge University Press:  01 August 2006

Zdeněk Stuchlík ,
Petr Slaný  and
Gabriel Török
Zdeněk Stuchlík
Affiliation:
Institute of Physics, Faculty of Philosophy and Science, Silesian University in Opava, Bezručovo nám. 13, CZ-746 01 Opava, Czech Republic email: zdenek.stuchlik@fpf.slu.cz, petr.slany@fpf.slu.cz, terek@volny.cz
Petr Slaný
Affiliation:
Institute of Physics, Faculty of Philosophy and Science, Silesian University in Opava, Bezručovo nám. 13, CZ-746 01 Opava, Czech Republic email: zdenek.stuchlik@fpf.slu.cz, petr.slany@fpf.slu.cz, terek@volny.cz
Gabriel Török
Affiliation:
Institute of Physics, Faculty of Philosophy and Science, Silesian University in Opava, Bezručovo nám. 13, CZ-746 01 Opava, Czech Republic email: zdenek.stuchlik@fpf.slu.cz, petr.slany@fpf.slu.cz, terek@volny.cz
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Abstract

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Coordinate-independent definition of the characteristic, so-called “humpy” frequency related to the positive gradient of the orbital velocity in locally non-rotating frames around nearly extreme Kerr black holes is given and compared with the epicyclic and orbital frequencies for both Keplerian thin discs and limiting marginally stable thick discs.

Keywords

accretion disks – black hole physics – relativity – instabilities
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2 , Symposium S238: Black Holes from Stars to Galaxies – Across the Range of Masses , August 2006 , pp. 459 - 460
Copyright
Copyright © International Astronomical Union 2007

References

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Stuchlík, Z., Slaný, P., Török, G. & Abramowicz, M. A. 2005, Phys. Rev. D, 71, 024037CrossRefGoogle Scholar