Hangup Kicks: Still Larger Recoils by Partial SpinOrbit Alignment of BlackHole Binaries
Abstract
We revisit the scenario of the gravitational radiation recoil acquired by the final remnant of a blackholebinary merger by studying a set of configurations that have components of the spin both aligned with the orbital angular momentum and in the orbital plane. We perform a series of 42 new full numerical simulations for equalmass and equalspinmagnitude binaries. We extend previous recoil fitting formulas to include nonlinear terms in the spins and successfully include both the new and known results. The new predicted maximum velocity approaches 5000km/s for spins partially aligned with the orbital angular momentum, which leads to an important increase of the probabilities of large recoils in generic astrophysical mergers. We find nonnegligible probabilities for recoils of several thousand km/s from accretionaligned binaries.
 Publication:

Physical Review Letters
 Pub Date:
 December 2011
 DOI:
 10.1103/PhysRevLett.107.231102
 arXiv:
 arXiv:1108.2009
 Bibcode:
 2011PhRvL.107w1102L
 Keywords:

 04.25.dg;
 04.25.Nx;
 04.30.Db;
 04.70.Bw;
 Numerical studies of black holes and blackhole binaries;
 PostNewtonian approximation;
 perturbation theory;
 related approximations;
 Wave generation and sources;
 Classical black holes;
 General Relativity and Quantum Cosmology;
 Astrophysics  Cosmology and Extragalactic Astrophysics;
 Astrophysics  Galaxy Astrophysics;
 Astrophysics  High Energy Astrophysical Phenomena
 EPrint:
 4 pages, 3 figures, revtex 4, references fixed. To appear in PRL