4 papers
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…
Splitting the Gravitational Atom: Instabilities of Black Holes with Synchronized or Resonant Hair
Jordan Nicoules, José Ferreira, Carlos A. R. Herdeiro +2
Black holes (BHs) with synchronized bosonic hair challenge the Kerr paradigm, linking superradiance from ultralight fields -- creating gravitational atoms -- to bosonic stars acros…
Gregory-Laflamme-type instability of boson strings and related phases in D=5 Kaluza-Klein theory
Carlos A. R. Herdeiro, Eugen Radu
We add an extra dimension (size ) to the well known static, spherically symmetric -balls and boson stars. We show that the resulting uniform horizonless boson str…
Bifurcations in Bosonic Stars: chains and rings from spherical solutions
Chen Liang, Carlos A. R. Herdeiro, Eugen Radu
We study the bifurcation phenomena between spherical and axisymmetric bosonic stars. By numerically solving for the zero-modes of spherical bosonic stars under specific axially sym…