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          Institute: MPI für Gravitationsphysik     Collection: Astrophysical Relativity     Display Documents

ID: 398385.0, MPI für Gravitationsphysik / Astrophysical Relativity
Accurate effective-one-body waveforms of inspiralling and coalescing black-hole binaries
Authors:Damour, Thibault; Nagar, Alessandro; Hannam, Mark; Husa, Sascha; Brügmann, Bernd
Date of Publication (YYYY-MM-DD):2008-08-18
Title of Journal:Physical Review D
Issue / Number:4
Sequence Number of Article:044039
Review Status:Peer-review
Audience:Not Specified
Abstract / Description:The effective-one-body (EOB) formalism contains several flexibility parameters, notably a5, vpole, and [overline a]RR. We show here how to jointly constrain the values of these parameters by simultaneously best-fitting the EOB waveform to two, independent, numerical relativity (NR) simulations of inspiralling and/or coalescing binary black-hole systems: published Caltech-Cornell inspiral data (considered for gravitational wave frequencies Momega<=0.1) on one side, and newly computed coalescence data on the other side. The resulting, approximately unique, “best-fit” EOB waveform is then shown to exhibit excellent agreement with NR coalescence data for several mass ratios. The dephasing between this best-fit EOB waveform and published Caltech-Cornell inspiral data is found to vary between -0.0014 and +0.0008 radians over a time span of ~2464M up to gravitational wave frequency Momega=0.1, and between +0.0013 and -0.0185 over a time span of 96M after Momega=0.1 up to Momega=0.1565. The dephasings between EOB and the new coalescence data are found to be smaller than: (i) ±0.025 radians over a time span of 730M (11 cycles) up to merger, in the equal-mass case, and (ii) ±0.05 radians over a time span of about 950M (17 cycles) up to merger in the 2:1 mass-ratio case. These new results corroborate the aptitude of the EOB formalism to provide accurate representations of general relativistic waveforms, which are needed by currently operating gravitational wave detectors.
External Publication Status:published
Document Type:Article
Communicated by:Bernhard F. Schutz
Affiliations:MPI für Gravitationsphysik/Astrophysical Relativity
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