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  Template bank for gravitational waveforms from coalescing binary black holes: Nonspinning binaries

Ajith, P., Babak, S., Chen, Y., Hewitson, M., Krishnan, B., Sintes, A. M., et al. (2008). Template bank for gravitational waveforms from coalescing binary black holes: Nonspinning binaries. Physical Review D, 77(10): 104017. doi:10.1103/PhysRevD.77.104017.

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Ajith, P.1, Author
Babak, Stanislav1, Author           
Chen, Yanbei1, Author           
Hewitson, Martin2, Author           
Krishnan, Badri1, Author           
Sintes, A. M.1, Author           
Whelan, John T.1, Author           
Brügmann, B.3, Author
Diener, P.3, Author
Dorband, Nils1, Author           
Gonzales, J.3, Author
Hannam, M.3, Author
Husa, Sascha1, Author           
Pollney, Denis1, Author           
Rezzolla, Luciano1, Author           
Santamaria Lara, Lucia1, Author           
Sperhake, U.3, Author
Thornburg, J.1, Author
Affiliations:
1Astrophysical Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, Golm, DE, ou_24013              
2Observational Relativity and Cosmology, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, Hannover, DE, ou_24011              
3External Organizations, ou_24013              

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 Abstract: Gravitational waveforms from the inspiral and ring-down stages of the binary black-hole coalescences can be modeled accurately by approximation/perturbation techniques in general relativity. Recent progress in numerical relativity has enabled us to model also the nonperturbative merger phase of the binary black-hole coalescence problem. This enables us to coherently search for all three stages of the coalescence of nonspinning binary black holes using a single template bank. Taking our motivation from these results, we propose a family of template waveforms which can model the inspiral, merger, and ring-down stages of the coalescence of nonspinning binary black holes that follow quasicircular inspiral. This two-dimensional template family is explicitly parametrized by the physical parameters of the binary. We show that the template family is not only effectual in detecting the signals from black-hole coalescences, but also faithful in estimating the parameters of the binary. We compare the sensitivity of a search (in the context of different ground-based interferometers) using all three stages of the black-hole coalescence with other template-based searches which look for individual stages separately. We find that the proposed search is significantly more sensitive than other template-based searches for a substantial mass range, potentially bringing about remarkable improvement in the event rate of ground-based interferometers. As part of this work, we also prescribe a general procedure to construct interpolated template banks using nonspinning black-hole waveforms produced by numerical relativity.

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 Dates: 2008-05
 Publication Status: Issued
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 Identifiers: DOI: 10.1103/PhysRevD.77.104017
eDoc: 438195
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Title: Physical Review D
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Pages: - Volume / Issue: 77 (10) Sequence Number: 104017 Start / End Page: - Identifier: ISSN: 1089-4918