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Nonlinear Gravitational Recoil from the Mergers of Precessing Black-Hole Binaries
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Nonlinear Gravitational Recoil from the Mergers of Precessing Black-Hole Binaries
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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.
Forward citations
Cited by 3 Pith papers
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New surrogate models NRSur7dq4 and RemnantModel accurately predict waveforms and remnant properties for precessing unequal-mass binary black holes up to q=4, outperforming existing models by an order of magnitude.
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Recoil kicks from binary black hole mergers in GWTC catalogs: implications for retention and hierarchical mergers
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