Amplification of superkicks in black-hole binaries through orbital eccentricity

Ulrich Sperhake, Roxana Rosca-Mead, Davide Gerosa, Emanuele Berti

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)
272 Downloads (Pure)


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....
Original languageEnglish
Article number024044
Number of pages9
JournalPhysical Review D
Issue number2
Publication statusPublished - 22 Jan 2020

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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