6533b7d0fe1ef96bd125b01a

RESEARCH PRODUCT

Dynamical formation of a hairy black hole in a cavity from the decay of unstable solitons

Nicolas Sanchis-gualJosé A. FontJuan Carlos DegolladoEugen RaduCarlos A. R. Herdeiro

subject

PhysicsRadiation or classical fieldsPhysics and Astronomy (miscellaneous)010308 nuclear & particles physicsScalar (mathematics)Time evolutionFOS: Physical sciencesSuperradianceGeneral Relativity and Quantum Cosmology (gr-qc)01 natural sciencesInstabilityEinstein–Maxwell spacetimesGeneral Relativity and Quantum CosmologyBlack holeNumerical relativityGeneral Relativity and Quantum CosmologyNumerical studies of black holes and black-hole binaries0103 physical sciencesSpacetimes with fluidsSoliton010306 general physicsRelativity and gravitationClassical black holesBosonMathematical physics

description

Recent numerical relativity simulations within the Einstein--Maxwell--(charged-)Klein-Gordon (EMcKG) system have shown that the non-linear evolution of a superradiantly unstable Reissner-Nordstr\"om black hole (BH) enclosed in a cavity, leads to the formation of a BH with scalar hair. Perturbative evidence for the stability of such hairy BHs has been independently established, confirming they are the true endpoints of the superradiant instability. The same EMcKG system admits also charged scalar soliton-type solutions, which can be either stable or unstable. Using numerical relativity techniques, we provide evidence that the time evolution of some of these $\textit{unstable}$ solitons leads, again, to the formation of a hairy BH. In some other cases, unstable solitons evolve into a (bald) Reissner-Nordstr\"om BH. These results establish that the system admits two distinct channels to form hairy BHs at the threshold of superradiance: growing hair from an unstable (bald) BH, or growing a horizon from an unstable (horizonless) soliton. Some parallelism with the case of asymptotically flat boson stars and Kerr BHs with scalar hair is drawn.

yearjournalcountryeditionlanguage
2016-11-08
https://dx.doi.org/10.48550/arxiv.1611.02441