Periastron Advance in Black-Hole Binaries

Details Periastron Advance in Black-Hole Binaries Periastron Advance in Black-Hole Binaries

2011-06-16

arxiv.org/abs/1106.3278v2

Phys.Rev.Lett.107:141101,2011

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

5 pages, 3 figures; v2: new abstract, updated figures correcting minor error, added references, minor changes to match publish

Scientific paper

The general relativistic (Mercury-type) periastron advance is calculated here for the first time with exquisite precision in full general relativity. We use accurate numerical relativity simulations of spinless black hole binaries with mass ratios 1/8 < m1/m2 < 1 and compare with the predictions of several analytic approximation schemes. We find the effective-one-body model to be remarkably accurate, and, surprisingly, so also the predictions of self-force theory [replacing m1/m2 --> m1m2/(m1+m2)^2]. Our results can inform a universal analytic model of the two-body dynamics, crucial for ongoing and future gravitational-wave searches.

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