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Blázquez Salcedo, José Luis Macedo, Caio F.B. Cardoso, Vitor Ferrari, Valeria Gualtieri, Leonardo Khoo, Fech Scen Kunz, Jutta Pani, Paolo 2024-02-12T15:44:47Z 2024-02-12T15:44:47Z 2016 Blázquez-Salcedo, Jose Luis, et al. «Perturbed Black Holes in Einstein-Dilaton-Gauss-Bonnet Gravity: Stability, Ringdown, and Gravitational-Wave Emission». Physical Review D, vol. 94, n.o 10, noviembre de 2016, p. 104024. DOI.org (Crossref), https://doi.org/10.1103/PhysRevD.94.104024. 2470-0010 10.1103/PhysRevD.94.104024 https://hdl.handle.net/20.500.14352/101302 2470-0029 https://doi.org/10.1103/PhysRevD.94.104024 Gravitational waves emitted by distorted black holes-such as those arising from the coalescence of two neutron stars or black holes-carry not only information about the corresponding spacetime but also about the underlying theory of gravity. Although general relativity remains the simplest, most elegant, and viable theory of gravitation, there are generic and robust arguments indicating that it is not the ultimate description of the gravitational universe. Here, we focus on a particularly appealing extension of general relativity, which corrects Einstein's theory through the addition of terms which are second order in curvature: the topological Gauss-Bonnet invariant coupled to a dilaton. We study gravitational-wave emission from black holes in this theory and (i) find strong evidence that black holes are linearly (mode) stable against both axial and polar perturbations, (ii) discuss how the quasinormal modes of black holes can be excited during collisions involving black holes, and finally (iii) show that future ringdown detections with a large signal-to-noise ratio would improve current constraints on the coupling parameter of the theory. eng http://creativecommons.org/licenses/by/4.0/ open access Attribution 4.0 International Perturbed black holes in Einstein-dilaton-Gauss-Bonnet gravity: stability, ringdown, and gravitational-wave emission journal article