3 papers
gr-qc2025
Spin-2 Green's Functions on Kerr in Radiation Gauge
Marc Casals, Stefan Hollands, Adam Pound +1
We construct retarded and advanced Green's functions for gravitational perturbations in Kerr in an ingoing radiation gauge. Our Green's functions have a frequency domain piece that…
gr-qc2024
Extremal Black Hole Weather
Claudio Iuliano, Stefan Hollands, Stephen R. Green +1
We consider weakly non-linear gravitational perturbations of a near-extremal Kerr black hole governed by the second order vacuum Einstein equation. Using the GHZ formalism [Green e…
gr-qc2024
Metric Reconstruction in Kerr Spacetime
Stefan Hollands, Vahid Toomani
Metric reconstruction is the general problem of parameterizing GR in terms of its two ``true degrees of freedom'', e.g., by a complex scalar ``potential'' -- in practice mostly wit…