Speaker: Carlos Herdeiro (Univ. of Aveiro)
Abstract:
Over the last three years it has been found that new classes of asymptotically flat black hole solutions, regular on and outside the event horizon, bifurcating from the vacuum Kerr solution, exist in General Relativity, with simple matter contents that obey all energy conditions, namely Kerr black holes with scalar hair and Proca hair. In this talk, after briefly reviewing the observational evidence for black holes and their standard theoretical description, I will describe the general mechanism that allows the new solutions to exist, intimately connected to superradiance, how these solutions circumvent well known no-hair theorems and some of their phenomenology (shadows and x-ray spectra) which can be considerably distinct from that of Kerr.
Some key references:
- Carlos A. R. Herdeiro, Eugen Radu
Kerr black holes with scalar hair
Phys.Rev.Lett. 112 (2014) 221101
- Carlos Herdeiro, Eugen Radu, Helgi Runarsson
Kerr black holes with Proca hair
Class.Quant.Grav. 33 (2016) no.15, 154001
- Pedro V. P. Cunha, Carlos A. R. Herdeiro, Eugen Radu, Helgi F. Runarsson
Shadows of Kerr black holes with scalar hair
Phys.Rev.Lett. 115 (2015) 21, 211102
- F.H. Vincent, E. Gourgoulhon, C. Herdeiro, E. Radu
Astrophysical imaging of Kerr black holes with scalar hair
Phys.Rev. D94 (2016) no.8, 084045
- Yueying Ni, Menglei Zhou, Alejandro Cardenas-Avendano, Cosimo Bambi, Carlos A. R. Herdeiro, Eugen Radu
Iron Kα-line of Kerr black holes with scalar hair
JCAP 1607 (2016) no.07, 049