Search technique to observe precessing compact binary mergers in the advanced detector era - INSPIRE

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Search technique to observe precessing compact binary mergers in the advanced detector era

Connor McIsaac
(
- Portsmouth U., ICG
)
,
Charlie Hoy
(
- Portsmouth U., ICG
)
,
Ian Harry
(
- Portsmouth U., ICG
)

Mar 30, 2023

23 pages

Published in:

Phys.Rev.D 108 (2023) 12, 123016

Published: Dec 11, 2023

e-Print:

2303.17364 [gr-qc]

DOI:

10.1103/PhysRevD.108.123016 (publication)

Report number:

LIGO-P2300071

View in:

ADS Abstract Service

reference search19 citations

Citations per year

Abstract: (APS)

Gravitational-wave signals from compact binary coalescences are most effectively identified by matched filter searches. These searches match the data against a pregenerated bank of gravitational-wave templates. Currently, all modeled gravitational-wave searches use templates that restrict the component spins to be aligned (or antialigned) with the orbital angular momentum. This means that they are less sensitive to gravitational-wave signals from precessing binaries, implying that a significant fraction of signals may remain undetected. In this work, we introduce a matched filter search that is sensitive to signals generated from precessing binaries. We take advantage of the fact that a gravitational-wave signal from a precessing binary can be decomposed into a power series of five harmonics. This allows us to create a generic-spin template bank that is only

\sim 3

times larger than existing aligned-spin banks. Our new search shows a

\sim 100 %

increase in sensitive volume for neutron star black hole binaries with total mass larger than

17.5 M_{⊙}

and in-plane spins

> 0.67

, and improves sensitivity by

\sim 60 %

on average across the full generic spin neutron-star black-hole parameter space. In addition, our generic spin search performs as well as existing aligned-spin searches for neutron star black hole signals with insignificant in-plane spins. We anticipate that this improved technique will identify significantly more gravitational-wave signals and help shed light on the unknown spin distribution of binaries in the Universe.

Note:

23 pages, 12 figures. For data release, see https://icg-gravwaves.github.io/precessing_search_paper/

binary: compact
black hole
binary: coalescence
gravitational radiation
spin: precession
neutron star
sensitivity
angular momentum
expansion: harmonic
gravitational radiation detector

References(93)

Figures(12)

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