Speaker
Description
Testing the Kerr hypothesis via gravitational wave data requires tools sensitive to potential deviations from general relativity. The Baines-Visser (BV) spacetime provides a well-motivated, maximally general parametrisation of axisymmetric stationary black hole spacetimes, encoding departures from classical Kerr via three radial functions: $\Phi(r)$, $\Delta(r)$, and $\Xi(r)$. In this talk I introduce the BV spacetime, impose separability of the Teukolsky equation and derive the associated Teukolsky equation, which enables analytical computation of post-merger ringdown modes. Comparing these modes to those observed in gravitational wave data offers a direct pathway to constraining the three free functions, providing a systematic framework for black hole spectroscopy beyond GR.
| Research Area | Gravity: Geometric theory |
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