24 papers
Analytic backreaction of a scalar wig on a Schwarzschild black hole
Marco de Cesare, Manuel Del Piano, Carlos A. R. Herdeiro
The paper analytically computes how a massive scalar quasi‑bound state backreacts on a Schwarzschild black hole, deriving metric perturbations, horizon evolution, and the scalar’s…
Two shadows of a single black hole: Vacuum birefringence phenomena within Einstein-nonlinear-electrodynamics
Marco A. A. de Paula, Haroldo C. D. Lima, Pedro V. P. Cunha +2
The paper investigates photon propagation in black holes sourced by a nonlinear electrodynamics model, showing that vacuum birefringence leads to two distinct photon trajectories a…
Spontaneous spherical symmetry breaking of black holes with resonant hair
José Ferreira, Carlos A. R. Herdeiro, Eugen Radu +1
Black holes with resonant hair are static, spherical, electrically charged solutions of the Einstein-Maxwell-(gauged-)scalar system. Scalar self-interactions are mandatory for thei…
Electromagnetic duality degeneracy in dynamical black hole mergers
José Ferreira, Gabriele Bozzola, Carlos A. R. Herdeiro +2
Electromagnetic duality is a symmetry of the source-free Einstein-Maxwell equations that rotates electric and magnetic fields while leaving the stress-energy tensor invariant. We p…
Relativistic and Newtonian Proca Stars: A Tale of Two Limits
Alberto Diez-Tejedor, Carlos Herdeiro, Claudio Lazarte +4
We investigate a representative set of static solitonic solutions of the Einstein-Proca theory in the Newtonian regime, where the field frequency approaches the particle mass, $Ï\…
Two asymptotically flat spinning black holes balanced by their self-interacting, synchronised scalar hair
Chen Liang, Carlos Herdeiro, Eugen Radu
Asymptotically flat balanced configurations of two spinning black holes with synchronised scalar hair (2sBHs) are possible (arXiv:2305.15467). These are constructed within a genera…