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Gravitational Recoil and Astrophysical Impact

Sperhake, Ulrich (2014) Gravitational Recoil and Astrophysical Impact. In: Gravitational Wave Astrophysics. Astrophysics and Space Science Proceedings. No.40. Springer , Cham, pp. 185-202. ISBN 978-3-319-10488-1.

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Asymmetric emission of gravitational waves from astrophysical sources leads to a net flux of linear momentum from the source and, by momentum conservation, imparts a gravitational recoil on the emitting source. Numerical relativity simulations have revealed that this effect can lead to astonishingly large kick velocities, so-called superkicks, of several thousand km/s in the inspiral and merger of black-hole binaries. We here discuss the calculation of the recoil in black-hole spacetimes and the astrophysical repercussions of such large kicks, in particular related to the possible displacement or ejection of supermassive black holes from their host galaxies. We also discuss possible mechanisms that would make superkicks less likely to occur in astrophysical binaries and thus explain why most, if not all, galaxies observed in this context appear to harbor a black hole at their center.

Item Type:Book Section
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Sperhake, Ulrich0000-0002-3134-7088
Additional Information:© 2015 Springer International Publishing Switzerland. First Online: 10 November 2014. The author thanks E. Berti, D. Gerosa, M. Kesden, R. O’Shaughnessy for many fruitful discussions. This work was supported by NSF-XSEDE Grant No. PHY-090003, FP7-PEOPLE-2011-CIG Grant No. 293412 “CBHEO”, FP7-PEOPLE-2011-IRSES Grant No.295189“NRHEP”, STFC GR Roller Grant No. ST/L000636/1, the Cosmos system, part of DiRAC, funded by STFC and BIS under Grant Nos. ST/K00333X/1, ST/H008586/1 and ST/J005673/1, ERC-2010-StG Grant No. DyBHo, and CESGA Grant No. ICTS-2013-249. Computations were performed on the Cambridge Cosmos system, the SDSC Trestles and NICS Kraken clusters, and CESGA’s Finis Terra.
Funding AgencyGrant Number
Marie Curie Fellowship293412
Marie Curie Fellowship295189
Science and Technology Facilities Council (STFC)ST/L000636/1
Science and Technology Facilities Council (STFC)ST/K00333X/1
Science and Technology Facilities Council (STFC)ST/H008586/1
Science and Technology Facilities Council (STFC)ST/J005673/1
European Research Council (ERC)DyBHo-256667
Centro de Supercomputacion de Galicia (CESGA)ICTS-2013-249
Series Name:Astrophysics and Space Science Proceedings
Issue or Number:40
Record Number:CaltechAUTHORS:20170616-135533609
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Official Citation:Sperhake U. (2015) Gravitational Recoil and Astrophysical Impact. In: Sopuerta C. (eds) Gravitational Wave Astrophysics. Astrophysics and Space Science Proceedings, vol 40. Springer, Cham
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:78292
Deposited By: Tony Diaz
Deposited On:16 Jun 2017 21:07
Last Modified:15 Nov 2021 17:38

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