J
2009
Orbital resonances in discs around braneworld Kerr black holes
KOTRLOVÁ, Andrea and Zdeněk STUCHLÍK
Basic information
Original name
Orbital resonances in discs around braneworld Kerr black holes
Edition
General Relativity and Gravitation, US - Spojené státy americké, 2009, 0001-7701
Other information
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
Keywords in English
Accretion, accretion disks, Braneworld black hole physics, Orbital resonances, X-rays: general
Tags
International impact, Reviewed
Links
MSM4781305903, plan (intention).
V originále
Rotating black holes in the brany universe of the Randall-Sundrum type are described by the Kerr geometry with a tidal charge b representing the interaction of the brany black hole and the bulk spacetime. For b<0 rotating black holes with dimensionless spin a>1 are allowed. We investigate the role of the tidal charge b in the orbital resonance model of QPOs in black hole systems. The orbital Keplerian, the radial and vertical epicyclic frequencies of the equatorial, quasicircular geodetical motion are given and their radial profiles are discussed. The resonant conditions are given in three astrophysically relevant situations: for direct (parametric) resonances, for the relativistic precession model, and for some trapped oscillations of the warped discs, with resonant combinational frequencies.
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