CENTRA Seminar - Kerr black holes with bosonic hair: theory and phenomenology - 4 maio 2017

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