The Fate of a Five-Dimensional Rotating Black Hole via Hawking Radiation

We study the evolution of a five-dimensional rotating black hole emitting scalar field radiation via the Hawking process for arbitrary initial values of the two rotation parameters $a$ and $b$. It is found that any such black hole whose initial rotation parameters are both nonzero evolves toward an asymptotic state $a\mathrm{/}{M}^{1\mathrm{/}2}=b\mathrm{/}{M}^{1\mathrm{/}2}=\mathrm{c}\mathrm{o}\mathrm{n}\mathrm{s}\mathrm{t}(\mathrm{\ne }0)$, where this constant is independent of the initial values of $a$ and $b$.