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Parametrized black hole quasinormal ringdown. II. Coupled equations and quadratic corrections for nonrotating black holes / McManus, Ryan (Johns Hopkins U.) ; Berti, Emanuele (Johns Hopkins U.) ; Macedo, Caio F.B. (Para U.) ; Kimura, Masashi (Rikkyo U.) ; Maselli, Andrea (Rome U. ; INFN, Rome) ; Cardoso, Vitor (Lisbon, CENTRA ; CERN)
Linear perturbations of spherically symmetric spacetimes in general relativity are described by radial wave equations, with potentials that depend on the spin of the perturbing field. In previous work we studied the quasinormal mode spectrum of spacetimes for which the radial potentials are slightly modified from their general relativistic form, writing generic small modifications as a power-series expansion in the radial coordinate. [...]
arXiv:1906.05155.- 2019-08-30 - 16 p. - Published in : Phys. Rev. D 100 (2019) 044061 Article from SCOAP3: PDF; Fulltext: PDF;

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Parametrized black hole quasinormal ringdown: Decoupled equations for nonrotating black holes / Cardoso, Vitor (IST, Lisbon (main) ; CERN) ; Kimura, Masashi (IST, Lisbon (main) ; Rikkyo U.) ; Maselli, Andrea (U. Rome La Sapienza (main) ; INFN, Rome) ; Berti, Emanuele (Johns Hopkins U. (main)) ; Macedo, Caio F.B. (Para U.) ; McManus, Ryan (Johns Hopkins U. (main))
Black hole solutions in general relativity are simple. The frequency spectrum of linear perturbations around these solutions (i.e., the quasinormal modes) is also simple, and therefore it is a prime target for fundamental tests of black hole spacetimes and of the underlying theory of gravity. [...]
arXiv:1901.01265.- 2019-05-29 - 11 p. - Published in : Phys. Rev. D 99 (2019) 104077 Fulltext: PDF; Fulltext from Publisher: PDF;

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Perturbed black holes in Einstein-dilaton-Gauss-Bonnet gravity: stability, ringdown, and gravitational-wave emission / Blázquez-Salcedo, Jose Luis (Oldenburg U.) ; Macedo, Caio F. B. (Lisbon, CENTRA ; Lisbon, IST) ; Cardoso, Vitor (CERN ; Lisbon, CENTRA ; Lisbon, IST ; Perimeter Inst. Theor. Phys.) ; Ferrari, Valeria (INFN, Rome ; Rome U.) ; Gualtieri, Leonardo (INFN, Rome ; Rome U.) ; Khoo, Fech Scen (Bremen U.) ; Kunz, Jutta (Oldenburg U.) ; Pani, Paolo (Rome U. ; INFN, Rome ; Lisbon, CENTRA ; Lisbon, IST)
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. [...]
arXiv:1609.01286.- 2016-11-10 - 15 p. - Published in : Phys. Rev. D 94 (2016) 104024 APS Open Access article: PDF; Fulltext: 10.1103_PhysRevD.94.104024 - PDF; 1609.01286 - PDF; Preprint: PDF; External link: Preprint

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Gravitational-wave signatures of exotic compact objects and of quantum corrections at the horizon scale / Cardoso, Vitor (Lisbon, CENTRA ; Lisbon, IST ; Perimeter Inst. Theor. Phys. ; CERN) ; Hopper, Seth (Lisbon, CENTRA ; Lisbon, IST) ; Macedo, Caio F. B. (Lisbon, CENTRA ; Lisbon, IST) ; Palenzuela, Carlos (U. Iles Balears, Palma) ; Pani, Paolo (Rome U. ; INFN, Rome ; Lisbon, CENTRA ; Lisbon, IST)
Gravitational waves from binary coalescences provide one of the cleanest signatures of the nature of compact objects. It has been recently argued that the post-merger ringdown waveform of exotic ultracompact objects is initially identical to that of a black-hole, and that putative corrections at the horizon scale will appear as secondary pulses after the main burst of radiation. [...]
arXiv:1608.08637.- 2016-10-21 - 13 p. - Published in : Phys. Rev. D 94 (2016) 084031 APS Open Access article: PDF; Fulltext: arXiv:1608.08637 - PDF; 10.1103_PhysRevD.94.084031 - PDF; External link: Preprint

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