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

Ajith, P., Babak, S., Chen, Y., Hewitson, M., Krishnan, B., Sintes, A., Whelan, J., Brügmann, B., Diener, P., Dorband, N., Gonzalez, J., Hannam, Mark ORCID: https://orcid.org/0000-0001-5571-325X, Husa, S., Pollney, D., Rezzolla, L., Santamaría, L., Sperhake, U. and Thornburg, J. 2008. Template bank for gravitational waveforms from coalescing binary black holes: Nonspinning binaries. Physical Review D 77 (10) , 104017. 10.1103/PhysRevD.77.104017

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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.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Subjects:	Q Science > QB Astronomy
Uncontrolled Keywords:	22 pp,. See also Erratum: DOI: 10.1103/PhysRevD.79.129901
Publisher:	American Physical Society
ISSN:	1550-7998
Last Modified:	20 Oct 2022 08:18
URI:	https://orca.cardiff.ac.uk/id/eprint/27882

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