Talks at the DAA. Talk by professor Carlos Herdeiro, from the Department of Physics, University of Aveiro, Portugal. Place: Seminar of the Department of Astronomy and Astrophysics, 4th floor of the Research Building, at Burjassot. Date: Thursday 2 February 2017. Time: 12.00.

ABSTRACT:

Over the last two 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 I will review the general mechanism that allows these 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


- Nicola Franchini, Paolo Pani, Andrea Maselli, Leonardo Gualtieri, Carlos A R Herdeiro, Eugen Radu, Valeria Ferrari

Constraining Black Holes with Light Boson Hair and Boson Stars using Quasi Periodic Oscillations

e-Print: arXiv:1612.00038 [astro-ph.HE]

•