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Journal Article

New Coordinate Systems for Axisymmetric Black Hole Collisions

MPS-Authors

Brandt,  Steven
Astrophysical Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society;

Walker,  Paul
Astrophysical Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society;

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Fulltext (public)

PRD-98-57-.pdf
(Publisher version), 246KB

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Citation

Anninos, P., Brandt, S., & Walker, P. (1998). New Coordinate Systems for Axisymmetric Black Hole Collisions. Physical Review D, 57(10), 6158-6167.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0013-592B-6
Abstract
We describe a grid generation procedure designed to construct new classes of orthogonal coordinate systems for binary black hole spacetimes. The computed coordinates offer an alternative approach to current methods, in addition to providing a framework for potentially more stable and accurate evolutions of colliding black holes. As a particular example, we apply our procedure to generate appropriate numerical grids to evolve Misner’s axisymmetric initial data set representing two equal mass black holes colliding head-on. These new results are compared with previously published calculations, and we find generally good agreement in both the waveform profiles and total radiated energies over the allowable range of separation parameters. Furthermore, because no specialized treatment of the coordinate singularities is required, these new grids are more easily extendible to unequal mass and spinning black hole collisions.