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Kerr-Newman black holes with scalar hair
Jorge F. M. Delgado, Carlos A. R. Herdeiro, Eugen Radu +1
We construct electrically charged Kerr black holes (BHs) with scalar hair. Firstly, we take an uncharged scalar field, interacting with the electromagnetic field only indirectly, v…
Shadows of Kerr black holes with and without scalar hair
Pedro V. P. Cunha, Carlos A. R. Herdeiro, Eugen Radu +1
For an observer, the Black Hole (BH) shadow is the BH's apparent image in the sky due to the gravitational lensing of nearby radiation, emitted by an external source. A recent clas…
Kerr black holes with Proca hair
Carlos Herdeiro, Eugen Radu, Helgi Runarsson
Bekenstein proved that in Einstein's gravity minimally coupled to one (or many) real, Abelian, Proca field, stationary black holes (BHs) cannot have Proca hair. Dropping Bekenstein…
Shadows of Kerr black holes with scalar hair
Pedro V. P. Cunha, Carlos A. R. Herdeiro, Eugen Radu +1
Using backwards ray tracing, we study the shadows of Kerr black holes with scalar hair (KBHsSH). KBHsSH interpolate continuously between Kerr BHs and boson stars (BSs), so we start…
Non-linear Q-clouds around Kerr black holes
Carlos Herdeiro, Eugen Radu, Helgi Runarsson
Q-balls are regular extended `objects' that exist for some non-gravitating, self-interacting, scalar field theories with a global, continuous, internal symmetry, on Minkowski space…
What are extremal Kerr Killing vectors up to?
Jan E. Aman, Ingemar Bengtsson, Helgi F. Runarsson
In the extremal Kerr spacetime the horizon Killing vector field is null on a timelike hypersurface crossing the horizon at a fixed latitude, and spacelike on both sides of the hori…