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arxiv: gr-qc/0703075 · v1 · submitted 2007-03-13 · 🌀 gr-qc · astro-ph

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Binary black hole mergers: large kicks for generic spin orientations

Wolfgang Tichy , Pedro Marronetti
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classification 🌀 gr-qc astro-ph
keywords spinblackorientationsfindgenericholeinitialkick
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We present results from several simulations of equal mass black holes with spin. The spin magnitudes are $S/m^2=0.8$ in all cases, but we vary the spin orientations arbitrarily, in and outside the orbital plane. We find that in all but one case the final merged black hole acquires a kick of more than 1000 km/s, indicating that kicks of this magnitude are likely to be generic and should be expected for mergers with general spin orientations. The maximum kick velocity we find is 2500 km/s and occurs for initial spins which are anti-aligned in the initial orbital plane.

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  1. Inference of recoil kicks from binary black hole mergers up to GWTC--4 and their astrophysical implications

    astro-ph.HE 2026-04 unverdicted novelty 5.0

    Recoil kicks are inferred for GWTC-4 binary black hole events with values up to nearly 1000 km/s for some, yielding retention probabilities of 1-5% in globular clusters and 70-100% in elliptical galaxies.