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Quadratic quasi-normal mode dependence on linear mode parity

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arxiv 2405.10270 v3 pith:3CLILUPI submitted 2024-05-16 gr-qc

Quadratic quasi-normal mode dependence on linear mode parity

classification gr-qc
keywords linearqnmsratioblackeven-holemodeodd-parity
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Quasinormal modes (QNMs) uniquely describe the dominant piece of the gravitational-wave ringdown of postmerger black holes. While the linear QNM regime has been extensively studied, recent work has highlighted the importance of second-perturbative-order, quadratic QNMs (QQNMs) arising from the nonlinear coupling of linear QNMs. Previous attempts to quantify the magnitude of these QQNMs have shown discrepant results. Using a new hyperboloidal framework, we resolve the discrepancy by showing that the QQNM/QNM ratio is a function not only of the black hole parameters but also of the ratio between even- and odd-parity linear QNMs: the ratio QQNM/QNM depends on what created the ringing black hole, but only through this ratio of even- to odd-parity linear perturbations.

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Forward citations

Cited by 7 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

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