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Dietrich Häfner: Linear stability of slowly rotating Kerr spacetimes

Time: Thu 2019-11-21 11.00 - 12.00

Location: Seminar Hall Kuskvillan, Institut Mittag-Leffler

Participating: Dietrich Häfner, Université Grenoble Alpes

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In joint work with Peter Hintz and András Vasy, we study the asymptotic behavior of linearized gravitational perturbations of Schwarzschild and slowly rotating Kerr black hole spacetimes. We show that solutions of the linearized Einstein equation decay at an inverse polynomial rate to a stationary solution (given by an infinitesimal variation of the mass and angular momentum of the black hole), plus a pure gauge term. In this talk, I will describe the geometric background and the analytic setup of our result, including a discussion of gauge fixing. Our proof is based on a precise description of the resolvent of an associated wave equation on symmetric 2-tensors near zero energy.