PIRSA:26040139 Scientific Series Strong Gravity

DOI10.48660/26040139

Series: Strong Gravity

Maenaut, S. (2026). Ringing of Rapidly Rotating Black Holes in Higher-derivative Gravity. Perimeter Institute. https://pirsa.org/26040139

Maenaut, Simon. Ringing of Rapidly Rotating Black Holes in Higher-derivative Gravity. Perimeter Institute, Apr. 30, 2026, https://pirsa.org/26040139 

@misc{ pirsa_PIRSA:26040139,
  doi = {10.48660/26040139},
  url = {https://pirsa.org/26040139},
  author = {Maenaut, Simon},
  keywords = {Strong Gravity},
  language = {en},
  title = {Ringing of Rapidly Rotating Black Holes in Higher-derivative Gravity},
  publisher = {Perimeter Institute},
  year = {2026},
  month = {apr},
  note = {PIRSA:26040139 see, \url{https://pirsa.org}}
}

Abstract

Within the Effective Field Theory approach to gravity, deviations from General Relativity can be systematically described by higher-curvature operators. However, computing the resulting corrections to black hole quasinormal mode spectra remains challenging in the rapidly rotating regime, where perturbative expansions in the spin break down. Making use of recently constructed numerical rotating black hole solutions, we computed scalar quasinormal mode frequency shifts at leading order for scalar Gauss-Bonnet, dynamical Chern-Simons and Cubic Riemann corrections. We employed a pseudo-spectral collocation method to solve the perturbation equations on these backgrounds, enabling accurate computation across a broad parameter range. We observed that corrections to certain modes grow significantly as the spin approaches the near-extremal regime.

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