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  Quasinormal modes of weakly charged Einstein-Maxwell-dilaton black holes

Brito, R., & Pacilio, C. (2018). Quasinormal modes of weakly charged Einstein-Maxwell-dilaton black holes. Physical Review D, 98: 104042. doi:10.1103/PhysRevD.98.104042.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0002-4AD4-C Version Permalink: http://hdl.handle.net/21.11116/0000-0002-E8E2-9
Genre: Journal Article

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 Creators:
Brito, Richard1, Author              
Pacilio, Costantino, Author
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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
 Abstract: Einstein-Maxwell-dilaton theory is an interesting and well-motivated theoretical laboratory to explore the impact of new fundamental degrees of freedom in the context of testing the no-hair conjecture, due to the existence of hairy black hole solutions together with the propagation of scalar, vector and tensor modes. In this paper we compute the quasinormal mode spectrum of static and slowly rotating black holes for generic values of the dilaton coupling, within a weak electric charge approximation. Our results suggest that these spacetimes are stable for generic values of the dilaton coupling and the black hole charge. We also show that while gravitational modes are only weakly affected by the coupling with the dilaton, the spectrum of electromagnetic modes exhibit a more pronounced dilaton-dependent breaking of isospectrality between the axial and polar sectors. We further show that the gravitational quasinormal modes are well approximated by the properties of unstable null circular geodesics in those spacetimes, while the treatment of electromagnetic and scalar modes can be simplified by a suitably modified Dudley-Finley scheme for the perturbed equations.

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 Dates: 2018-07-242018-07-302018
 Publication Status: Published in print
 Pages: 20 pages, 11 figures; v2: references added
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 Table of Contents: -
 Rev. Method: -
 Identifiers: arXiv: 1807.09081
URI: http://arxiv.org/abs/1807.09081
DOI: 10.1103/PhysRevD.98.104042
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Title: Physical Review D
  Other : Phys. Rev. D.
Source Genre: Journal
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Publ. Info: Lancaster, Pa. : American Physical Society
Pages: - Volume / Issue: 98 Sequence Number: 104042 Start / End Page: - Identifier: ISSN: 0556-2821
CoNE: https://pure.mpg.de/cone/journals/resource/111088197762258