Amplification of superkicks in black-hole binaries through orbital eccentricity

Ulrich Sperhake, Roxana Rosca-Mead, Davide Gerosa, and Emanuele Berti
Phys. Rev. D 101, 024044 – Published 22 January 2020

Abstract

We present new numerical-relativity simulations of eccentric merging black holes with initially antiparallel spins lying in the orbital plane (the so-called 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.

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  • Received 3 October 2019

DOI:https://doi.org/10.1103/PhysRevD.101.024044

© 2020 American Physical Society

Physics Subject Headings (PhySH)

Gravitation, Cosmology & Astrophysics

Authors & Affiliations

Ulrich Sperhake1,2,3,*, Roxana Rosca-Mead1,†, Davide Gerosa4,‡, and Emanuele Berti5,2,§

  • 1Department of Applied Mathematics and Theoretical Physics, Centre for Mathematical Sciences, University of Cambridge, Wilberforce Road, Cambridge CB3 0WA, United Kingdom
  • 2Department of Physics and Astronomy, The University of Mississippi University, Mississippi 38677, USA
  • 3California Institute of Technology, Pasadena, California 91125, USA
  • 4School of Physics and Astronomy and Institute for Gravitational Wave Astronomy, University of Birmingham, Birmingham B15 2TT, United Kingdom
  • 5Department of Physics and Astronomy, Johns Hopkins University, 3400 N. Charles Street, Baltimore, Maryland 21218, USA

  • *u.sperhake@damtp.cam.ac.uk
  • rr417@cam.ac.uk
  • d.gerosa@bham.ac.uk
  • §berti@jhu.edu

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Issue

Vol. 101, Iss. 2 — 15 January 2020

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