Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2011-09-30
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
4 pages, 2 figures; to appear in the Proceedings of the "46th Rencontres de Moriond & GPhyS Colloquium on Gravitational Waves
Scientific paper
The orbital motion of inspiralling and coalescing black hole binaries can be investigated using a variety of approximation schemes and numerical methods within general relativity: post-Newtonian expansions, black hole perturbation theory, numerical relativity, and the effective-one-body formalism. We review two recent comparisons of the predictions from these various techniques. Both comparisons rely on the calculation of a coordinate invariant relation, in the case of non-spinning binary black holes on quasi-circular orbits. All methods are shown to agree very well in their common domain of validity.
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