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Amplification of superkicks in black-hole binaries through orbital eccentricity

Sperhake, Ulrich and Rosca-Mead, Roxana and Gerosa, Davide and Berti, Emanuele (2020) Amplification of superkicks in black-hole binaries through orbital eccentricity. Physical Review D, 101 (2). Art. No. 024044. ISSN 2470-0010. doi:10.1103/physrevd.101.024044.

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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.

Item Type:Article
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URLURL TypeDescription Paper
Sperhake, Ulrich0000-0002-3134-7088
Rosca-Mead, Roxana0000-0001-5666-1033
Gerosa, Davide0000-0002-0933-3579
Berti, Emanuele0000-0003-0751-5130
Additional Information:© 2020 American Physical Society. Received 3 October 2019; published 22 January 2020. We thank V. Baibhav for discussions. U.S. is supported by the European Union’s H2020 ERC Consolidator Grant “Matter and strong-field gravity: new frontiers in Einstein’s theory” Grant No. MaGRaTh–646597 and the STFC Consolidator Grant No. ST/P000673/1. D. G. is supported by Leverhulme Trust Grant No. RPG-2019-350. E. B. is supported by NSF Grant No. PHY-1912550, NSF Grant No. AST-1841358, NASA ATP Grant No. 17-ATP17-0225, and NASA ATP Grant No. 19-ATP19-0051. This work has received funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie Grant No. 690904. This work was supported by the GWverse COST Action Grant No. CA16104, “Black holes, gravitational waves and fundamental physics.” Computational work was performed on the SDSC Comet and TACC Stampede2 clusters through NSF-XSEDE Grant No. PHY-090003, Cambridge CSD3 system through STFC capital Grants No. ST/P002307/1 and No. ST/R002452/1, and STFC operations Grant No. ST/R00689X/1; the University of Birmingham BlueBEAR cluster; the Athena cluster at HPC Midlands +funded by EPSRC Grant No. EP/P020232/1; and the Maryland Advanced Research Computing Center.
Funding AgencyGrant Number
European Research Council (ERC)646597
Science and Technology Facilities Council (STFC)ST/P000673/1
Leverhulme TrustRPG-2019-350
Marie Curie Fellowship690904
European Cooperation in Science and TechnologyCA16104
Science and Technology Facilities Council (STFC)ST/P002307/1
Science and Technology Facilities Council (STFC)ST/R002452/1
Science and Technology Facilities Council (STFC)ST/R00689X/1
University of BirminghamUNSPECIFIED
Engineering and Physical Sciences Research Council (EPSRC)EP/P020232/1
Maryland Advanced Research Computing CenterUNSPECIFIED
Issue or Number:2
Record Number:CaltechAUTHORS:20200122-111639044
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:100837
Deposited By: Tony Diaz
Deposited On:22 Jan 2020 23:50
Last Modified:16 Nov 2021 17:57

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