Removal of conical singularities from rotating C-metrics and dual CFT entropy

Understand

We show how to remove from the rotating C-metric spacetime, which describes accelerating Kerr black holes, both conical singularities.

• This can be done by embedding the metric into a swirling gravitational universe, through a proper Ehlers transformation.
• The spin-spin interaction between the external rotational background and the black hole provides the source of the acceleration without the need of rods or strings.
• The physical properties and entropy of the new solution are studied using near horizon and dual conformal techniques of the Kerr/CFT correspondence.