New Generic Ringdown Frequencies at the Birth of a Kerr Black Hole

Details New Generic Ringdown Frequencies at the Birth of a Kerr Black Hole New Generic Ringdown Frequencies at the Birth of a Kerr Black Hole

2011-06-04

arxiv.org/abs/1106.0782v2

Phys. Rev. D 84, 084012 (2011)

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

17 pages, 8 figures. Numerical analysis corrected, references added; reflects published version

Scientific paper

We discuss a new ringdown frequency mode for vacuum perturbations of the Kerr black hole. We evolve initial data for the vacuum radial Teukolsky equation using a near horizon approximation, and find a frequency mode analogous to that found in a recent study of radiation generated by a plunging particle close to the Kerr horizon. We discuss our results in the context of that study. We also explore the utility of this mode by fitting a numerical waveform with a combination of the usual quasi-normal modes (QNMs) and the new oscillation frequency.

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