1307.2194 (Andres Anabalon et al.)

On the mechanical stability of asymptotically flat black holes with
minimally coupled scalar hair    [PDF]

Andres Anabalon, Nathalie Deruelle

We show that the asymptotically flat hairy black holes, solutions of the Einstein field equations minimally coupled to a scalar field, previously discovered by one of us, present mode instability against linear radial perturbations. It is also shown that the number of unstable modes is finite and their frequencies can be made arbitrarily small.

View original: http://arxiv.org/abs/1307.2194