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, 1572-9532
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 with infinite additional dimension 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 in the orbital resonance model of quasiperiodic oscillations (QPOs) in black hole systems. The orbital Keplerian frequency v (K) and the radial and vertical epicyclic frequencies v (r), v (theta) of the equatorial, quasicircular geodetical motion are given. Their radial profiles related to Keplerian accretion discs are discussed, assuming the inner edge of the disc located at the innermost stable circular geodesic. For completeness, naked singularity spacetimes are considered too.
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