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Title: Explosion and final state of an unstable Reissner-Nordstrom black hole
Author: Sanchis-Gual, Nicolas
Degollado, Juan Carlos
Montero, Pedro J.
Font, José A.
Herdeiro, Carlos
Issue Date: Apr-2016
Publisher: American Physical Society
Abstract: A Reissner-Nordstrm black hole (BH) is superradiantly unstable against spherical perturbations of a charged scalar field enclosed in a cavity, with a frequency lower than a critical value. We use numerical relativity techniques to follow the development of this unstable system-dubbed a charged BH bomb-into the nonlinear regime, solving the full Einstein-Maxwell-Klein-Gordon equations, in spherical symmetry. We show that (i) the process stops before all the charge is extracted from the BH, and (ii) the system settles down into a hairy BH: a charged horizon in equilibrium with a scalar field condensate, whose phase is oscillating at the (final) critical frequency. For a low scalar field charge q, the final state is approached smoothly and monotonically. For large q, however, the energy extraction overshoots, and an explosive phenomenon, akin to a bosenova, pushes some energy back into the BH. The charge extraction, by contrast, does not reverse.
Peer review: yes
DOI: 10.1103/PhysRevLett.116.141101
ISSN: 0031-9007
Appears in Collections:CIDMA - Artigos
DFis - Artigos
GGDG - Artigos

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