Title: Towards understanding the endpoint of the superradiant instability: Kerr black holes with synchronised hair

Speaker: Eugen Radu (Aveiro University)

Abstract: A 50 year-old lingering question in black hole (BH) physics is the endpoint of the Kerr BH superradiant instability, triggered by massive, bosonic fields.In a recent breakthrough, East and Pretorius reported long term numerical evolutions of this instability, using a Proca field to trigger it.Evolutions terminate in stationary states of the vector field condensate synchronised with a rotating BH horizon. We show these end points are fundamental states of Kerr BHs with synchronised Proca hair. We also propose a universal (i.e. field-spin independent), analytic model for the subset of BHs that possess a quasi-Kerr horizon, and show the model is accurate for hairy BHs that may emerge dynamically from superradiance.

Time: Thursday 26th October 2017, 2.30pm.

Place: Lecture Room, School of Theoretical Physics, DIAS, 10 Burlington Road, Dublin 4.