Black Hole Cartography

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• Richard Dyer / IoA
• Wednesday 06 November 2024, 13:15-13:40
• The Hoyle Lecture Theatre + Zoom .

If you have a question about this talk, please contact Xander Byrne.

As a perturbed black hole relaxes into its Kerr state following a merger, it rings down by producing quasinormal modes (QNMs). These are oscillations at specific complex frequencies and with angular structures determined by first-order perturbation theory. Spatial information can be extracted from numerical simulations by fitting a feature of known time dependence; a program we call black hole cartography. We demonstrate that QNMs can be reconstructed using our method by recovering the predictions of first-order perturbation theory. Furthermore, we apply the technique to quadratic QNMs (appearing at second-order) and demonstrate that we can determine their angular structures. This is a step towards an improved understanding of non-linearities in the ringdown, which will be important for observations with future gravitational wave detectors.

This talk is part of the Institute of Astronomy Seminars series.

This talk is included in these lists:

• Cambridge Astronomy Talks
• Combined External Astrophysics Talks DAMTP
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• Cosmology, Astrophysics and General Relativity
• Institute of Astronomy Seminars
• Institute of Astronomy Talk Lists
• Kavli Institute for Cosmology Talk Lists
• Priscilla
• The Hoyle Lecture Theatre + Zoom

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