Aschenbach Effect for Brany Kerr Black Holes and Naked Singularities
Abstract
We study the nonmonotonic Keplerian velocity profiles related to locally nonrotating frames (LNRF) in the field of nearextreme braneworld Kerr black holes and naked singularities in which the nonlocal gravitational effects of the bulk are represented by a braneworld tidal charge b and the 4D geometry of the spacetime structure is governed by the KerrNewman geometry. We show that positive tidal charge has a tendency to restrict the values of the black hole dimensionless spin a admitting existence of the nonmonotonic Keplerian LNRFvelocity profiles; the nonmonotonic profiles exist in the black hole spacetimes with tidal charge smaller than b = 0.41005 (and spin larger than a = 0.76808). With decreasing value of the tidal charge (which need not be only positive), both the region of spin allowing the nonmonotonicity in the LNRFvelocity profile around braneworld Kerr black hole and the velocity difference in the minimummaximum parts of the velocity profile increase implying growing astrophysical relevance of this phenomenon.
 Publication:

Proceedings of RAGtime 1013
 Pub Date:
 December 2014
 Bibcode:
 2014bhns.work..173S
 Keywords:

 Aschenbach effect;
 Randall Sundrum;
 Braneworld