# Fundamental Tone and Overtones of Quasinormal Modes in Ringdown Gravitational Waves: A Detailed Study in Black Hole Perturbation

@article{Sago2021FundamentalTA, title={Fundamental Tone and Overtones of Quasinormal Modes in Ringdown Gravitational Waves: A Detailed Study in Black Hole Perturbation}, author={Norichika Sago and Soichiro Isoyama and Hiroyuki Nakano}, journal={Universe}, year={2021} }

Ringdown gravitational waves of compact object binaries observed by ground-based gravitational-wave detectors encapsulate rich information to understand remnant objects after the merger and to test general relativity in the strong field. In this work, we investigate the ringdown gravitational waves in detail to better understand their property, assuming that the remnant objects are black holes. For this purpose, we perform numerical simulations of post-merger phase of binary black holes by…

## 3 Citations

Gravitational ringing of rotating black holes in higher-derivative gravity

- PhysicsPhysical Review D
- 2022

We study gravitational perturbations of slowly-rotating black holes in a general effective-fieldtheory extension of general relativity that includes up to eight-derivative terms. We show that two…

Echoes from hairy black holes

- PhysicsJournal of High Energy Physics
- 2022

Abstract
We study the waveforms of time signals produced by scalar perturbations in static hairy black holes, in which the perturbations can be governed by a double-peak effective potential. The…

Ease of excitation of black hole ringing: Quantifying the importance of overtones by the excitation factors

- PhysicsPhysical Review D
- 2021

The excitation factors of black hole quasinormal modes quantify the ease of excitation of the quasinormal modes and are independent of the source of perturbation. We compute the excitation factors of…

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