Bonn 2010 – scientific programme

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GR: Fachverband Gravitation und Relativitätstheorie

GR 16: Numerische Relativitätstheorie

GR 16.1: Talk

Thursday, March 18, 2010, 17:25–17:45, JUR K

Toward a dynamical shift condition for unequal mass black hole binary simulations — •Doreen Müller, Jason Grigsby, and Bernd Brügmann — Theoretisch-Physikalisches Institut, FSU Jena

Moving puncture simulations of black hole binaries rely on a specific gauge choice that leads to approximately stationary coordinates near each black hole. Part of the shift condition is a damping parameter, which has to be properly chosen for stable evolutions. However, a constant damping parameter does not account for the difference in mass in unequal mass binaries. We introduce a position dependent shift damping that addresses this problem. Although the coordinates change, the changes in the extracted gravitational waves are small.