Non-monotonic orbital velocity profiles around rapidly rotating Kerr-(anti-)de Sitter black holes

Details Non-monotonic orbital velocity profiles around rapidly rotating Kerr-(anti-)de Sitter black holes Non-monotonic orbital velocity profiles around rapidly rotating Kerr-(anti-)de Sitter black holes

2007-04-30

arxiv.org/abs/0704.3963v1

Class.Quant.Grav.24:2637-2644,2007

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

9 pages, 4 figures, accepted for Class. Quant. Grav

Scientific paper

10.1088/0264-9381/24/10/009

It has been recently demonstrated that the orbital velocity profile around Kerr black holes in the equatorial plane as observed in the locally non-rotating frame exhibits a non-monotonic radial behaviour. We show here that this unexpected minimum-maximum feature of the orbital velocity remains if the Kerr vacuum is generalized to the Kerr-de Sitter or Kerr-anti-de Sitter metric. This is a new general relativity effect in Kerr spacetimes with non-vanishing cosmological constant. Assuming that the profile of the orbital velocity is known, this effect constrains the spacetime parameters.

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