Berlin 2005 – wissenschaftliches Programm

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GR: Gravitation und Relativitätstheorie

GR 9: Gravitationswellen – Mathematisch-Numerische Grundlagen

GR 9.5: Vortrag

Samstag, 5. März 2005, 12:15–12:30, TU BH262

A double-domain spectral method for black hole excision data — •Marcus Ansorg — Albert-Einstein-Institut, Golm

In this talk, a new spectral method to compute binary black hole initial data numerically is presented. The method solves a system of elliptic partial differential equations in the exterior of two excised spheres. At the surface of these spheres, boundary conditions need to be imposed. As such, the method can be used to construct arbitrary initial data corresponding to binary black holes with specific boundary conditions valid at their apparent horizons. After a description of the method, current initial data formulations such as the thin-sandwich approach together with boundary conditions derived from the isolated horizon framework are discussed.