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  Excited hairy black holes: dynamical construction and level transitions

Bosch, P., Green, S., Lehner, L., & Roussille, H. (2020). Excited hairy black holes: dynamical construction and level transitions. Physical Review D, 102(4): 044014. doi:10.1103/PhysRevD.102.044014.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0005-72A9-C Version Permalink: http://hdl.handle.net/21.11116/0000-0006-F2D7-6
Genre: Journal Article

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 Creators:
Bosch, Pablo, Author
Green, Stephen1, Author              
Lehner , Luis, Author
Roussille, Hugo, Author
Affiliations:
1Astrophysical and Cosmological Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, ou_1933290              

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Free keywords: General Relativity and Quantum Cosmology, gr-qc,High Energy Physics - Theory, hep-th
 Abstract: We study the dynamics of unstable Reissner-Nordstr\"om anti-de Sitter black holes under charged scalar field perturbations in spherical symmetry. We unravel their general behavior and approach to the final equlibrium state. In the first part of this work, we present a numerical analysis of massive charged scalar field quasinormal modes. We identify the known mode families - superradiant modes, zero-damped modes, AdS modes, and the near-horizon mode - and we track their migration under variation of the black hole and field parameters. We show that the zero-damped modes become superradiantly unstable for large RNAdS with large gauge coupling; the leading unstable mode is identified with the near-horizon condensation instability. In the second part, we present results of numerical simulations of perturbed large RNAdS, showing the nonlinear development of these unstable modes. For generic initial conditions, charge and mass are ransferred from the black hole to the scalar field, until an equilibrium solution with a scalar condensate is reached. We use results from the linear analysis, however, to select special initial data corresponding to an unstable overtone mode. We find that these data evolve to produce a new equilibrium state - an excited hairy black hole with the scalar condensate in an overtone configuration. This state is, however, unstable, and the black hole eventually decays to the generic end state. Nevertheless, this demonstrates the potential relevance of overtone modes as transients in black hole dynamics.

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 Dates: 2019-12-112020
 Publication Status: Published in print
 Pages: 16 pages, 17 figures
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 Rev. Type: -
 Identifiers: arXiv: 1912.05598
URI: http://arxiv.org/abs/1912.05598
DOI: 10.1103/PhysRevD.102.044014
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Title: Physical Review D
Source Genre: Journal
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Pages: - Volume / Issue: 102 (4) Sequence Number: 044014 Start / End Page: - Identifier: -