Understanding the "anti-kick" in the merger of binary black holes
arXiv:1003.0873 · doi:10.1103/PhysRevLett.104.221101
Abstract
The generation of a large recoil velocity from the inspiral and merger of binary black holes represents one of the most exciting results of numerical-relativity calculations. While many aspects of this process have been investigated and explained, the "antikick", namely the sudden deceleration after the merger, has not yet found a simple explanation. We show that the antikick can be understood in terms of the radiation from a deformed black hole where the anisotropic curvature distribution on the horizon correlates with the direction and intensity of the recoil. Our analysis is focussed on Robinson-Trautman spacetimes and allows us to measure both the energies and momenta radiated in a gauge-invariant manner. At the same time, this simpler setup provides the qualitative and quantitative features of merging black holes, opening the way to a deeper understanding of the nonlinear dynamics of black-hole spacetimes.
4 pages; small changes to match the published version
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Cited by in corpus (7)
- The Fluid/Gravity Correspondence: a new perspective on the Membrane Paradigm
- Head-on collisions of unequal mass black holes in D=5 dimensions
- Superkicks in ultrarelativistic encounters of spinning black holes
- Modeling Gravitational Recoil Using Numerical Relativity
- On the proximity of black hole horizons: lessons from Vaidya
- Systematics of black hole binary inspiral kicks and the slowness approximation
- A hybrid method for understanding black-hole mergers: head-on case