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SUMMARY:Black Hole Cartography - Richard Dyer / IoA
DTSTART:20241106T131500Z
DTEND:20241106T134000Z
UID:TALK224146@talks.cam.ac.uk
CONTACT:Xander Byrne
DESCRIPTION:As a perturbed black hole relaxes into its Kerr state followin
 g a merger\, it rings down by producing quasinormal modes (QNMs). These ar
 e 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 d
 ependence\; a program we call black hole cartography. We demonstrate that 
 QNMs can be reconstructed using our method by recovering the predictions o
 f first-order perturbation theory. Furthermore\, we apply the technique to
  quadratic QNMs (appearing at second-order) and demonstrate that we can de
 termine their angular structures. This is a step towards an improved under
 standing of non-linearities in the ringdown\, which will be important for 
 observations with future gravitational wave detectors. 
LOCATION:The Hoyle Lecture Theatre + Zoom 
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