The peeling in the "very external region" of non linear perturbations of the Kerr spacetime

Abstract

Let an initial data metric $\overline{g}$ be, outside a ball $B_{R_0}$ centered in the origin, the induced metric on $Σ_0$ of a Kerr spacetime (with a mass $M$ and angular momentum $J$ whose ratio, $J/M$, depends on the size of $R_0$) plus small corrections which decay at spacelike infinity faster than $r^{-3}$; let, in the same region, a symmetric tensor $\overline{k}$ be the second fundamental form of the Kerr spacetime plus small corrections which decay at spacelike infinity faster than $r^{-4}$, let $\overline{g}$ and $\overline{k}$ satisfy the constraint equations. Then, using the previous results of \cite{Ch-Kl:book} and \cite{Kl-Ni:book}, the global existence of the external region of a global spacetime, outside the region of influence of $B_{R_0}$ follows. In this external region the various components of the Riemann tensor decay along the outgoing null directions in agreement with the "Peeling Theorem".