Amplification of superkicks in black-hole binaries through orbital eccentricity

Abstract

We present new numerical-relativity simulations of eccentric merging black holes with initially antiparallel spins lying in the orbital plane (the so-called \emph{superkick} configuration). Binary eccentricity boosts the recoil of the merger remnant by up to $25\%$. The increase in the energy flux is much more modest, and therefore this kick enhancement is mainly due to asymmetry in the binary dynamics. Our findings might have important consequences for the retention of stellar-mass black holes in star clusters and supermassive black holes in galactic hosts.

9 pages, 4 figures, to match published version in Phys.Rev.D

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Cited by in corpus (11)

• Eccentric binary black hole surrogate models for the gravitational waveform and remnant properties: comparable mass, nonspinning case
• Lessons for adaptive mesh refinement in numerical relativity
• Mapping eccentricity evolutions between numerical relativity and effective-one-body gravitational waveforms
• Dynamics and spin alignment in massive, gravito-turbulent circumbinary discs around supermassive black hole binaries
• Characterizing the effect of eccentricity on the dynamics of binary black hole mergers in numerical relativity
• A complete measurement of a black-hole recoil through higher-order gravitational-wave modes
• Gravitational-wave signatures of mirror (a)symmetry in binary black hole mergers: measurability and correlation to gravitational-wave recoil
• Anchored in Shadows: Tying the Celestial Reference Frame Directly to Black Hole Event Horizons
• Spatial mixing of stellar populations in globular clusters via binary-single star scattering
• Accurate models for recoil velocity distribution in black hole mergers with comparable to extreme mass-ratios and their astrophysical implications
• The influence of the mean anomaly on the dynamical quantities of binary black hole mergers in eccentric orbits