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Considerations on the excitation of black hole quasinormal modes

Emanuele Berti·Vitor Cardoso·Clifford M. Will
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Abstract

We provide some considerations on the excitation of black hole quasinormal modes (QNMs) in different physical scenarios. Considering a simple model in which a stream of particles accretes onto a black hole, we show that resonant QNM excitation by hyperaccretion requires a significant amount of fine-tuning, and is quite unlikely to occur in nature. Then we summarize and discuss present estimates of black hole QNM excitation from gravitational collapse, distorted black holes and head-on black hole collisions. We emphasize the areas that, in our opinion, are in urgent need of further investigation from the point of view of gravitational wave source modeling.

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Emanuele Berti, Vitor Cardoso, Clifford M. Will. 2006-01-18. Considerations on the excitation of black hole quasinormal modes. https://doi.org/10.1063/1.2348047

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