Toward a dynamical shift condition for unequal mass black hole binary simulations

Details Toward a dynamical shift condition for unequal mass black hole binary simulations Toward a dynamical shift condition for unequal mass black hole binary simulations

2009-12-16

arxiv.org/abs/0912.3125v1

Class.Quant.Grav.27:114008,2010

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

15 pages, submitted to CQG for NRDA 2009 conference proceedings

Scientific paper

10.1088/0264-9381/27/11/114008

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.

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