Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2005-10-28
Phys.Rev. D73 (2006) 064005
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
17 pages, 10 figures. Journal version with text changes, revised figures. [Note updated version of original Lazarus paper (gr-
Scientific paper
10.1103/PhysRevD.73.064005
The Lazarus project was designed to make the most of limited 3D binary black-hole simulations, through the identification of perturbations at late times, and subsequent evolution of the Weyl scalar $\Psi_4$ via the Teukolsky formulation. Here we report on new developments, employing the concept of the ``quasi-Kinnersley'' (transverse) frame, valid in the full nonlinear regime, to analyze late-time numerical spacetimes that should differ only slightly from Kerr. This allows us to extract the essential information about the background Kerr solution, and through this, to identify the radiation present. We explicitly test this procedure with full numerical evolutions of Bowen-York data for single spinning black holes, head-on and orbiting black holes near the ISCO regime. These techniques can be compared with previous Lazarus results, providing a measure of the numerical-tetrad errors intrinsic to the method, and give as a by-product a more robust wave extraction method for numerical relativity.
Campanelli Manuela
Kelly Bernard J.
Lousto Carlos O.
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