Freiburg 2008 – scientific programme
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GR: Fachverband Gravitation und Relativitätstheorie
GR 6: Numerische Relativitätstheorie
GR 6.2: Talk
Tuesday, March 4, 2008, 17:05–17:25, KGI-HS 1010
How to Slice a Black Hole Safely — Mark Hannam1, Sascha Husa2, •Frank Ohme1, Bernd Brügmann1, and Niall O Murchadha3 — 1Theoretical Physics Institute, University of Jena, Germany — 2Max Planck Institute for Gravitational Physics (Albert Einstein Institute), Potsdam, Germany — 3Physics Department, University College Cork, Ireland
In Numerical Relativity, the freedom to choose appropriate coordinates that represent the spactime becomes of great importance. Recent success in numerical simulations suggest that particular gauge conditions, which fix the choice of coordinates, are well adapted to the physical properties of black hole systems. We investigate how such a set of gauge conditions (in particular the "1+log" lapse) works in the case of a single Schwarzschild black hole. Among other things, Carter-Penrose diagrams are presented that illustrate how the numerical grid avoids the physical singularity and approaches an analytically predicted stationary foliation.