Séminaire de Physique ThéoriqueHairy black holes and self-accelerating cosmologies in the ghost-free bigravity and massive gravity
Mikhail Volkov (LMPT)
Thursday 07 June 2012 14:00 - Tours - Salle 1180 (Bât E2)
We present cosmological and black hole solutions in the recently proposed ghost-free theories of bigravity and massive gravity. Apart from the `standard' cosmologies which are matter-dominated at early times but show the late time self-acceleration, there are also more exotic solutions without the initial singularity. The black holes comprise several classes, depending on their asymptotic behavior, all of them supporting a short-range massive graviton hair outside the regular event horizon. The horizon is common for both metrics, and its temperatures defined with respect to each metric coincide.