We describe a numerical grid generating procedure to construct new classes of
orthogonal coordinate systems that are specially adapted to binary black hole
spacetimes. The new coordinates offer an alternative approach to the
conventional \v{C}ade\v{z} coordinates, in addition to providing a potentially
more stable and flexible platform to extend previous calculations of binary
black hole collisions.Comment: 3 pages, 5 postscript figures, LaTeX, uses mprocl.sty (available at
  http://shemesh.fiz.huji.ac.il/MG8/submission.html) To appear in the
  proceedings of the Marcel Grossmann 8 (Jerusalem, 1997

A. A. Abramovici

A. Einstein

C. Misner

J. F. Thompson

J. Libson

L. Smarr

M. Davis

M. E. Araújo

P. Anninos

Paul Walker

Peter Anninos

R. Matzner

S. G. Hahn

Steven Brandt

English

arXiv

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

Anninos, P.

Brandt, S.

Walker, P.

MPG.PuRe