Nonlinear Gravitational Recoil from the Mergers of Precessing Black-Hole
  Binaries
  We present results from an extensive study of 88 precessing, equal-mass
black-hole binaries with large spins (83 with intrinsic spins of 0.8 and 5 with
intrinsic spins of 0.9)and use these data to model new nonlinear contributions
to the gravitational recoil imparted to the merged black hole. We find a new
effect, the cross kick, that enhances the recoil for partially aligned binaries
beyond the hangup kick effect. This has the consequence of increasing the
probabilities of recoils larger than 2000 km/s by nearly a factor two, and,
consequently, of black holes getting ejected from galaxies, as well as the
observation of large differential redshifts/blueshifts in the cores of recently
merged galaxies.
