Massive scalar field perturbations of 4D de Sitter-Einstein-Gauss-Bonnet black holes
Date
Authors
BECAR COLLAO, RAMÓN ALENN
Becar, Ramon
Gonzalez, P. A.
Papantonopoulos, Eleftherios
Vasquez, Yerko
Becar, Ramon
Gonzalez, P. A.
Papantonopoulos, Eleftherios
Vasquez, Yerko
Authors
Date
Datos de publicación:
10.1103/y33s-2hd1
Keywords
Alternative gravity theories - Classical black holes - General relativity equations & solutions - General relativity formalism
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Abstract
We investigate the propagation of massive scalar fields in the background of four-dimensional Einstein-Gauss-Bonnet black holes with de Sitter (dS) asymptotics. Our study focuses on the various branches of quasinormal modes present in this background, employing the pseudospectral Chebyshev method and the third-order Wentzel-Kramers-Brillouin approximation. We identify that the introduction of the Gauss-Bonnet coupling constant alpha gives rise to three branches of modes: the perturbative (in alpha) Schwarzschild branch, the perturbative (in alpha) dS branch, and a nonperturbative (in alpha) dS branch. Our results show that the propagation of a massive scalar field is stable in this background. Furthermore, the Gauss-Bonnet coupling constant induces significant deviations in the Schwarzschild branch and smaller deviations in the perturbative dS branch compared to the corresponding branches in the Schwarzschild-dS limit. Additionally, the nonperturbative dS branch of modes, absent when alpha 1/4 0, emerges as a novel feature of the Einstein-Gauss-Bonnet framework.
Description
Keywords
Alternative gravity theories , Classical black holes , General relativity equations & solutions , General relativity formalism
Citation
10.1103/y33s-2hd1