Tetrad formalism for numerical relativity on conformally compactified constant mean curvature hypersurfaces

Details Tetrad formalism for numerical relativity on conformally compactified constant mean curvature hypersurfaces Tetrad formalism for numerical relativity on conformally compactified constant mean curvature hypersurfaces

2011-01-28

arxiv.org/abs/1101.5479v3

Phys.Rev.D83:104045,2011

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

Corrected factor of 2 errors in Eqs. (A8) and (A9) and a few typos; final version

Scientific paper

10.1103/PhysRevD.83.104045

We present a new evolution system for Einstein's field equations which is based on tetrad fields and conformally compactified hyperboloidal spatial hypersurfaces which reach future null infinity. The boost freedom in the choice of the tetrad is fixed by requiring that its timelike leg be orthogonal to the foliation, which consists of constant mean curvature slices. The rotational freedom in the tetrad is fixed by the 3D Nester gauge. With these conditions, the field equations reduce naturally to a first-order constrained symmetric hyperbolic evolution system which is coupled to elliptic equations for the gauge variables. The conformally rescaled equations are given explicitly, and their regularity at future null infinity is discussed. Our formulation is potentially useful for high accuracy numerical modeling of gravitational radiation emitted by inspiraling and merging black hole binaries and other highly relativistic isolated systems.

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