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High-accuracy comparison of numerical relativity simulations with post-Newtonian expansions

Boyle, Michael and Brown, Duncan A. and Kidder, Lawrence E. and Mroué, Abdul H. and Pfeiffer, Harald P. and Scheel, Mark A. and Cook, Gregory B. and Teukolsky, Saul A. (2007) High-accuracy comparison of numerical relativity simulations with post-Newtonian expansions. Physical Review D, 76 (12). Art. No. 124038. ISSN 2470-0010. https://resolver.caltech.edu/CaltechAUTHORS:BOYprd07b

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Abstract

Numerical simulations of 15 orbits of an equal-mass binary black-hole system are presented. Gravitational waveforms from these simulations, covering more than 30 cycles and ending about 1.5 cycles before merger, are compared with those from quasicircular zero-spin post-Newtonian (PN) formulae. The cumulative phase uncertainty of these comparisons is about 0.05 radians, dominated by effects arising from the small residual spins of the black holes and the small residual orbital eccentricity in the simulations. Matching numerical results to PN waveforms early in the run yields excellent agreement (within 0.05 radians) over the first ~15 cycles, thus validating the numerical simulation and establishing a regime where PN theory is accurate. In the last 15 cycles to merger, however, generic time-domain Taylor approximants build up phase differences of several radians. But, apparently by coincidence, one specific post-Newtonian approximant, TaylorT4 at 3.5PN order, agrees much better with the numerical simulations, with accumulated phase differences of less than 0.05 radians over the 30-cycle waveform. Gravitational-wave amplitude comparisons are also done between numerical simulations and post-Newtonian, and the agreement depends on the post-Newtonian order of the amplitude expansion: the amplitude difference is about 6%–7% for zeroth order and becomes smaller for increasing order. A newly derived 3.0PN amplitude correction improves agreement significantly (<1% amplitude difference throughout most of the run, increasing to 4% near merger) over the previously known 2.5PN amplitude terms.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1103/PhysRevD.76.124038DOIArticle
https://arxiv.org/abs/0710.0158arXivDiscussion Paper
Additional Information:© 2007 The American Physical Society. (Received 30 September 2007; published 27 December 2007) It is a pleasure to acknowledge useful discussions with Stuart Anderson, Alessandra Buonanno, Mark Hannam, Ian Hinder, Luis Lehner, Lee Lindblom, Geoffrey Lovelace, Sean McWilliams, Robert Owen, Yi Pan, Oliver Rinne, and Kip Thorne. In particular, we would like to thank Alessandra Buonanno for a careful reading of this manuscript, Rob Owen for estimating the BH spin, Geoffrey Lovelace for his help constructing initial data, Oliver Rinne for providing improved boundary conditions, and Lee Lindblom for his guidance and input throughout this project. This work was supported in part by grants from the Sherman Fairchild Foundation to Caltech and Cornell, and from the Brinson Foundation to Caltech; by NSF Grants No. PHY-0601459, No. PHY-0652995, No. DMS-0553302 and NASA Grant No. NNG05GG52G at Caltech; by NSF Grants No. PHY-0652952, No. DMS-0553677, No. PHY-0652929 and NASA Grant No. NNG05GG51G at Cornell; and by the Z. Smith Reynolds Foundation and NSF Grant No. PHY-0555617 at Wake Forest. We thank NASA/JPL for providing computing facilities that contributed to this work. Some of the simulations discussed here were produced with LIGO Laboratory computing facilities. LIGO was constructed by the California Institute of Technology and Massachusetts Institute of Technology with funding from the National Science Foundation and operates under cooperative agreement No. PHY-0107417. This paper has been assigned LIGO document No. LIGO-P070101-00-Z.
Group:LIGO, TAPIR
Funders:
Funding AgencyGrant Number
Sherman Fairchild FoundationUNSPECIFIED
Brinson FoundationUNSPECIFIED
NSFPHY-0601459
NSFPHY-0652995
NSFDMS-0553302
NASANNG05GG52G
NSFPHY-0652952
NSFDMS-0553677
NSFPHY-0652929
NASANNG05GG51G
Z. Smith Reynolds FoundationUNSPECIFIED
NSFPHY-0555617
NSFPHY-0107417
Other Numbering System:
Other Numbering System NameOther Numbering System ID
LIGO DocumentP070101-00-Z
Issue or Number:12
Classification Code:PACS numbers: 04.25.Nx, 04.25.D-, 04.25.dg, 04.30.-w
Record Number:CaltechAUTHORS:BOYprd07b
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:BOYprd07b
Alternative URL:http://dx.doi.org/10.1103/PhysRevD.76.124038
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:9422
Collection:CaltechAUTHORS
Deposited By: Archive Administrator
Deposited On:30 Dec 2007
Last Modified:03 Oct 2019 00:00

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