The Newtonian Limit of Geometrostatics

Abstract

This thesis discusses the Newtonian limit of General Relativity for static isolated systems with compactly supported matter. We call these systems "geometrostatic" to underline their geometric nature. We introduce new quasi-local notions of mass and center of mass that can be read off locally in the vicinity of the matter/black holes. We prove that these notions asymptotically coincide with ADM-mass and the Huisken-Yau CMC-center of mass. Moreover, we prove that they converge to Newtonian mass and center of mass in the Newtonian limit. The Newtonian limit is discussed in the language of Ehlers' frame theory. Furthermore, we prove several uniqueness claims in geometrostatics as well as other geometric and physical properties of these systems. We analyze equipotential sets, provide a pseudo-Newtonian reformulation of geometrostatics, and prove uniqueness of static photon spheres.

111 pages, 1 figure, dissertation

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• Explicit Riemannian manifolds with unexpectedly behaving center of mass
• A flow approach to Bartnik's static metric extension conjecture in axisymmetry