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Search for eccentric binary black hole mergers with advanced LIGO and advanced Virgo during their first and second observing runs

Citation

Siellez, K and The LIGO Scientific Collaboration and the Virgo Collaboration, Search for eccentric binary black hole mergers with advanced LIGO and advanced Virgo during their first and second observing runs, The Astrophysical Journal, 883, (2) Article 149. ISSN 1538-4357 (2019) [Refereed Article]


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DOI: doi:10.3847/1538-4357/ab3c2d

Abstract

When formed through dynamical interactions, stellar-mass binary black holes (BBHs) may retain eccentric orbits (e > 0.1 at 10 Hz) detectable by ground-based gravitational-wave detectors. Eccentricity can therefore be used to differentiate dynamically formed binaries from isolated BBH mergers. Current template-based gravitational-wave searches do not use waveform models associated with eccentric orbits, rendering the search less efficient for eccentric binary systems. Here we present the results of a search for BBH mergers that inspiral in eccentric orbits using data from the first and second observing runs (O1 and O2) of Advanced LIGO and Advanced Virgo. We carried out the search with the coherent WaveBurst algorithm, which uses minimal assumptions on the signal morphology and does not rely on binary waveform templates. We show that it is sensitive to binary mergers with a detection range that is weakly dependent on eccentricity for all bound systems. Our search did not identify any new binary merger candidates. We interpret these results in light of eccentric binary formation models. We rule out formation channels with rates ≳100 Gpc−3 yr−1 for e > 0.1, assuming a black hole mass spectrum with a power-law index ≲2.

Item Details

Item Type:Refereed Article
Keywords:gravitational waves, elliptical orbits, black holes
Research Division:Physical Sciences
Research Group:Astronomical sciences
Research Field:General relativity and gravitational waves
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the physical sciences
UTAS Author:Siellez, K (Dr Karelle Siellez)
ID Code:151030
Year Published:2019
Web of Science® Times Cited:36
Deposited By:Physics
Deposited On:2022-07-13
Last Modified:2022-07-13
Downloads:0

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