Publication date: Sep 2007
Abstract:
Critical discussion of the recently published results [Muller, A. and
Aschenbach, B. 2007 Class. Quantum Grav. 24, p. 2637; arXiv:0704.3963]
on the non-monotonic orbital velocity profiles of the Keplerian motion
of test particles and l = const motion of test perfect fluid around
K(a)dS black holes is given, and the discrepancies concerned the
existence of the non-monotonicity in dependence of the spacetime
parameters are corrected. Moreover a new non-monotonic behaviour of the
Keplerian orbital velocity in the Kerr-antide Sitter spacetimes is
highlighted.
Authors:
Slany, P.; Stuchlik, Z.;