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Horizon-absorption effects in coalescing black-hole binaries: An effective-one-body study of the nonspinning case

Bernuzzi, Sebastiano and Nagar, Alessandro and Zenginoğlu, Anıl (2012) Horizon-absorption effects in coalescing black-hole binaries: An effective-one-body study of the nonspinning case. Physical Review D, 86 (10). Art. No. 104038 . ISSN 2470-0010. doi:10.1103/PhysRevD.86.104038.

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We study the horizon absorption of gravitational waves in coalescing, circularized, nonspinning black-hole binaries. The horizon-absorbed fluxes of a binary with a large mass ratio (q = 1000) obtained by numerical perturbative simulations are compared with an analytical, effective-one-body (EOB) resummed expression recently proposed. The perturbative method employs an analytical, linear in the mass ratio, EOB-resummed radiation reaction, and the Regge-Wheeler-Zerilli formalism for wave extraction. Hyperboloidal layers are employed for the numerical solution of the Regge-Wheeler-Zerilli equations to accurately compute horizon fluxes up to the late plunge phase. The horizon fluxes from perturbative simulations and the EOB-resummed expression agree at the level of a few percent down to the late plunge. An upgrade of the EOB model for nonspinning binaries that includes horizon absorption of angular momentum as an additional term in the resummed radiation reaction is then discussed. The effect of this term on the waveform phasing for binaries with mass ratios spanning 1–1000 is investigated. We confirm that for comparable and intermediate-mass-ratio binaries horizon absorption is practically negligible for detection with advanced LIGO and the Einstein Telescope (faithfulness ≥ 0.997).

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Additional Information:© 2012 American Physical Society. Received 4 July 2012; published 15 November 2012. We are grateful to S. Akcay for the numerical data of Fig. 2, and D. Pollney for giving us access to the NR data of Refs. [35,37]. We thank T. Damour for useful suggestions, and N. K. Johnson-McDaniel for reading the manuscript. S. B. is supported by DFG Grant SFB/Transregio 7 "Gravitational Wave Astronomy." S.B. thanks IHES for hospitality and support during the development of part of this work. A. Z. is supported by the NSF Grant No. PHY-1068881, and by a Sherman Fairchild Foundation grant to Caltech. Computations were performed on the MERLIN cluster at IHES.
Funding AgencyGrant Number
Deutsche Forschungsgemeinschaft (DFG) SFB/Transregio 7UNSPECIFIED
Sherman Fairchild FoundationUNSPECIFIED
Issue or Number:10
Classification Code:PACS: 04.30.Db, 04.25.Nx, 95.30.Sf, 97.60.Lf
Record Number:CaltechAUTHORS:20121214-095442996
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:35986
Deposited By: Tony Diaz
Deposited On:17 Dec 2012 22:13
Last Modified:09 Nov 2021 23:19

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