39 citations · 152 across the 10 of their papers we have counts for
11 papers
Breaking the north-south symmetry: dyonic spinning black holes with synchronized gauged scalar hair
Pedro V. P. Cunha, Carlos A. R. Herdeiro, Eugen Radu +1
We study stationary clouds of a gauged, complex scalar field on a magnetically (and possibly electrically as well) charged Kerr-Newman black hole (BH). The existence of a magnetic…
Radial stability of spherical bosonic stars and critical points
Nuno M. Santos, Carolina L. Benone, Carlos A. R. Herdeiro
We study radial perturbations of spherically symmetric spin- and spin- bosonic stars, computing numerically the squared frequency of the fundamental mode. We find that not al…
The non-spherical ground state of Proca stars
C. A. R. Herdeiro, E. Radu, N. Sanchis-Gual +2
Spherical Proca Stars (PSs) are regarded as the ground state amongst the family of PSs. In accordance, spherical PSs are thought to have a fundamental branch of stable solutions. I…
Self-interacting dipolar boson stars and their dynamics
Pedro Ildefonso, Miguel Zilhão, Carlos Herdeiro +2
We construct and dynamically evolve dipolar, self-interacting scalar boson stars in a model with sextic (+ quartic) self-interactions. The domain of existence of such dipolar -s…
Scalaroca stars: coupled scalar-Proca solitons
Alexandre M. Pombo, João M. S. Oliveira, Nuno M. Santos
We construct and explore the physical properties of \textit{scalaroca stars}: spherically symmetric solitonic solutions made of a complex scalar field and a complex Proca field…
A little hair can make a big difference: thermodynamic stability of quasi-bald asymptotically-flat black holes
Nuno M. Santos, Carlos. A. R. Herdeiro, Eugen Radu
The local thermodynamic stability of a black hole (BH) in the canonical ensemble is defined by the positivity of the specific heat at constant global charges. Schwarzschild BHs in…
A bound on energy extraction (and hairiness) from superradiance
Carlos A. R. Herdeiro, Eugen Radu, Nuno M. Santos
The possibility of mining the rotational energy from black holes has far--reaching implications. Such energy extraction could occur even for isolated black holes, if hypothetical u…
Black holes, stationary clouds and magnetic fields
Nuno M. Santos, Carlos A. R. Herdeiro
As the electron in the hydrogen atom, a bosonic field can bind itself to a black hole occupying a discrete infinite set of states. When (i) the spacetime is prone to superradiance…
Stationary scalar and vector clouds around Kerr-Newman black holes
Nuno M. Santos, Carlos A. R. Herdeiro
Massive bosons in the vicinity of Kerr-Newman black holes can form pure bound states when their phase angular velocity fulills the synchronisation condition, i.e. at the threshold…
Black holes with synchronised Proca hair: linear clouds and fundamental non-linear solutions
Nuno M. Santos, Carolina L. Benone, Luís C. B. Crispino +2
Recent studies have made key progress on the black hole/solitonic solutions of the Einstein-Proca system. Firstly, fully non-linear dynamical evolutions of the Kerr black hole supe…
Exotic compact object behavior in black hole analogues
Carlos A. R. Herdeiro, Nuno M. Santos
Classical phenomenological aspects of acoustic perturbations on a draining bathtub geometry where a surface with reflectivity is set at a small distance from the woul…