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  Impact of precession on aligned-spin searches for neutron-tar-black-hole binaries

Dal Canton, T., Lundgren, A., & Nielsen, A. B. (2015). Impact of precession on aligned-spin searches for neutron-tar-black-hole binaries. Physical Review D, 91: 062010. doi:10.1103/PhysRevD.91.062010.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0024-C656-0 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0026-BA1B-1
Genre: Journal Article

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 Creators:
Dal Canton , Tito , Author
Lundgren, Andrew1, Author              
Nielsen, A. B.2, Author              
Affiliations:
1Observational Relativity and Cosmology, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, ou_24011              
2Astrophysical Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, ou_24013              

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Free keywords: General Relativity and Quantum Cosmology, gr-qc
 Abstract: The inclusion of aligned-spin effects in gravitational-wave search pipelines for neutron-star--black-hole binary coalescence has been shown to increase the astrophysical reach with respect to search methods where spins are neglected completely, under astrophysically reasonable assumptions about black-hole spins. However, theoretical considerations and population synthesis models suggest that many of these binaries may have a significant misalignment between the black-hole spin and the orbital angular momentum, which could lead to precession of the orbital plane during the inspiral and a consequent loss in detection efficiency if precession is ignored. This work explores the effect of spin misalignment on a search pipeline that completely neglects spin effects and on a recently-developed pipeline that only includes aligned-spin effects. Using synthetic but realistic data, which could reasonably represent the first scientific runs of advanced-LIGO detectors, the relative sensitivities of both pipelines are shown for different assumptions about black-hole spin magnitude and alignment with the orbital angular momentum. Despite the inclusion of aligned-spin effects, the loss in signal-to-noise ratio due to precession can be as large as $40\%$, but this has a limited impact on the overall detection rate: even if precession is a predominant feature of neutron-star--black-hole binaries, an aligned-spin search pipeline can still detect at least half of the signals compared to an idealized generic precessing search pipeline.

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 Dates: 2014-11-252015
 Publication Status: Published in print
 Pages: 11 pages, 7 figures
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: arXiv: 1411.6815
DOI: 10.1103/PhysRevD.91.062010
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Title: Physical Review D
  Other : Phys. Rev. D.
Source Genre: Journal
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Publ. Info: Lancaster, Pa. : American Physical Society
Pages: - Volume / Issue: 91 Sequence Number: 062010 Start / End Page: - Identifier: ISSN: 0556-2821
CoNE: /journals/resource/111088197762258