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Numerical binary black hole collisions in dynamical Chern-Simons gravity

Okounkova, Maria and Stein, Leo C. and Scheel, Mark A. and Teukolsky, Saul A. (2019) Numerical binary black hole collisions in dynamical Chern-Simons gravity. Physical Review D, 100 (10). Art. No. 104026. ISSN 2470-0010. doi:10.1103/PhysRevD.100.104026.

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We produce the first numerical relativity binary black hole gravitational waveforms in a higher-curvature theory beyond general relativity. In particular, we study head-on collisions of binary black holes in order-reduced dynamical Chern-Simons gravity. This is a precursor to producing beyond-general-relativity waveforms for inspiraling binary black hole systems that are useful for gravitational wave detection. Head-on collisions are interesting in their own right, however, as they cleanly probe the quasinormal mode spectrum of the final black hole. We thus compute the leading-order dynamical Chern-Simons modifications to the complex frequencies of the postmerger gravitational radiation. We consider equal-mass systems, with equal spins oriented along the axis of collision, resulting in remnant black holes with spin. We find modifications to the complex frequencies of the quasinormal mode spectrum that behave as a power law with the spin of the remnant, and that are not degenerate with the frequencies associated with a Kerr black hole of any mass and spin. We discuss these results in the context of testing general relativity with gravitational wave observations.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Okounkova, Maria0000-0001-7869-5496
Stein, Leo C.0000-0001-7559-9597
Teukolsky, Saul A.0000-0001-9765-4526
Additional Information:© 2019 American Physical Society. Received 20 June 2019; published 13 November 2019. This work was supported in part by the Sherman Fairchild Foundation, and NSF Grants No. PHY-1708212 and No. PHY-1708213 at Caltech and No. PHY-1606654 at Cornell. Computations were performed using the Spectral Einstein Code [21]. All computations were performed on the Wheeler cluster at Caltech, which is supported by the Sherman Fairchild Foundation and by Caltech.
Group:TAPIR, Walter Burke Institute for Theoretical Physics, Astronomy Department
Funding AgencyGrant Number
Sherman Fairchild FoundationUNSPECIFIED
Issue or Number:10
Record Number:CaltechAUTHORS:20190821-152122696
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:98088
Deposited By: Tony Diaz
Deposited On:21 Aug 2019 22:40
Last Modified:16 Nov 2021 17:36

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