Price's Law states that linear perturbations of a Schwarzschild black hole fall off as t-2ℓ-3 for t→∞ provided the initial data decay sufficiently fast at spatial infinity. Moreover, if the perturbations are initially static (i.e., their time derivative is zero), then the decay is predicted to be t-2ℓ-4. We give a proof of t-2ℓ-2 decay for general data in the form of weighted L1 to L∞ bounds for solutions of the Regge-Wheeler equation. For initially static perturbations we obtain t-2ℓ-3. The proof is based on an integral representation of the solution which follows from self-adjoint spectral theory. We apply two different perturbative arguments in order to construct the corresponding spectral measure and the decay bounds are obtained by appropriate oscillatory integral estimates.
All Science Journal Classification (ASJC) codes
- Dispersive estimates for wave equation
- Schwarzschild black hole
- Spectral and scattering theory