Considerations on the excitation of black hole quasinormal modes

Details Considerations on the excitation of black hole quasinormal modes Considerations on the excitation of black hole quasinormal modes

2006-01-18

arxiv.org/abs/gr-qc/0601077v1

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

11 pages, 2 figures, proceedings of the 7th International Conference of the Hellenic Astronomical Society. Complements section

Scientific paper

10.1063/1.2348047

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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