Dynamical shift condition for unequal mass black hole binaries

Details Dynamical shift condition for unequal mass black hole binaries Dynamical shift condition for unequal mass black hole binaries

2010-03-24

arxiv.org/abs/1003.4681v1

Phys. Rev. D 82, 064004 (2010)

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

10 pages, 14 figures

Scientific paper

10.1103/PhysRevD.82.064004

Certain numerical frameworks used for the evolution of binary black holes make use of a gamma driver, which includes a damping factor. Such simulations typically use a constant value for damping. However, it has been found that very specific values of the damping factor are needed for the calculation of unequal mass binaries. We examine carefully the role this damping plays, and provide two explicit, non-constant forms for the damping to be used with mass-ratios further from one. Our analysis of the resultant waveforms compares well against the constant damping case.

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