Black hole initial data without elliptic equations

Abstract

We explore whether a new method to solve the constraints of Einstein's equations can be applied to provide initial data for black holes. We show that this method, which does not involve elliptic equations, can be successfully applied to a nonlinear perturbation of a Schwarzschild black hole by establishing the well-posedness of the resulting constraint problem. We discuss its possible generalization to the boosted, spinning multiple black hole problem.