Eikonal quasinormal modes and shadow of string-corrected d-dimensional black holes

Eikonal quasinormal modes and shadow of string-corrected d-dimensional black holes

We compute the quasinormal frequencies of d-dimensional spherically symmetric black holes with leading string α′ corrections in the eikonal limit for tensorial gravitational perturbations and scalar test fields. We find that, differently than in Einstein gravity, the real parts of the frequency are...

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Main Authors: Filipe Moura, João Rodrigues
Format: Article
Language:English
Published: Elsevier 2021-08-01
Series:Physics Letters B
Online Access:http://www.sciencedirect.com/science/article/pii/S0370269321003476
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spelling doaj-ea2fc0d7950c4697aade4d1aeafa94442021-07-25T04:40:57ZengElsevierPhysics Letters B0370-26932021-08-01819136407Eikonal quasinormal modes and shadow of string-corrected d-dimensional black holesFilipe Moura0João Rodrigues1Departamento de Matemática, Escola de Tecnologias e Arquitetura and Instituto de Telecomunicações, ISCTE - Instituto Universitário de Lisboa, Av. das Forças Armadas, 1649-026 Lisboa, Portugal; Corresponding author.Centro de Física da Universidade de Coimbra, Rua Larga, 3004-516 Coimbra, PortugalWe compute the quasinormal frequencies of d-dimensional spherically symmetric black holes with leading string α′ corrections in the eikonal limit for tensorial gravitational perturbations and scalar test fields. We find that, differently than in Einstein gravity, the real parts of the frequency are no longer equal for these two cases. The corresponding imaginary parts remain equal to the principal Lyapunov exponent corresponding to circular null geodesics, to first order in α′. We also compute the radius of the shadow cast by these black holes.http://www.sciencedirect.com/science/article/pii/S0370269321003476
collection DOAJ
language English
format Article
sources DOAJ
author Filipe Moura
João Rodrigues
spellingShingle Filipe Moura
João Rodrigues
Eikonal quasinormal modes and shadow of string-corrected d-dimensional black holes
Physics Letters B
author_facet Filipe Moura
João Rodrigues
author_sort Filipe Moura
title Eikonal quasinormal modes and shadow of string-corrected d-dimensional black holes
title_short Eikonal quasinormal modes and shadow of string-corrected d-dimensional black holes
title_full Eikonal quasinormal modes and shadow of string-corrected d-dimensional black holes
title_fullStr Eikonal quasinormal modes and shadow of string-corrected d-dimensional black holes
title_full_unstemmed Eikonal quasinormal modes and shadow of string-corrected d-dimensional black holes
title_sort eikonal quasinormal modes and shadow of string-corrected d-dimensional black holes
publisher Elsevier
series Physics Letters B
issn 0370-2693
publishDate 2021-08-01
description We compute the quasinormal frequencies of d-dimensional spherically symmetric black holes with leading string α′ corrections in the eikonal limit for tensorial gravitational perturbations and scalar test fields. We find that, differently than in Einstein gravity, the real parts of the frequency are no longer equal for these two cases. The corresponding imaginary parts remain equal to the principal Lyapunov exponent corresponding to circular null geodesics, to first order in α′. We also compute the radius of the shadow cast by these black holes.
url http://www.sciencedirect.com/science/article/pii/S0370269321003476
work_keys_str_mv AT filipemoura eikonalquasinormalmodesandshadowofstringcorrectedddimensionalblackholes
AT joaorodrigues eikonalquasinormalmodesandshadowofstringcorrectedddimensionalblackholes
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