The `Ups' and `Downs' of a Spinning Black Hole
Chris M. Chambers, William A. Hiscock, Brett E. Taylor
Abstract
We report and comment upon the principal results of an investigation into the evolution of rotating black holes emitting massless scalar radiation via the Hawking process. It is demonstrated that a Kerr black hole evaporating by the emission of scalar radiation will evolve towards a state with a ≈ 0.555M. If the initial specific angular momentum is larger than this value the hole will spin down to this value; if it is less it will spin up to this value. The addition of higher spin fields to the picture strongly suggests the final asymptotic state of a realistic evaporation process will be characterized by an a/M = 0.
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