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

B. P. Abbott, S. V. Angelova, R. Birney, S. Macfoy, S. Reid, LIGO Scientific Collaboration, Virgo Collaboration

Research output: Contribution to journalArticle

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.

Original languageEnglish
Article number149
Number of pages10
JournalAstrophysical Journal
Volume883
Issue number2
DOIs
Publication statusPublished - 30 Sep 2019

Fingerprint

LIGO (observatory)
eccentrics
eccentric orbits
merger
eccentricity
gravitational waves
waveforms
templates
stellar mass
mass spectra
power law
detectors
interactions

Keywords

  • LIGO
  • intermediate mass black hole binaries
  • IMBHBs
  • gravitational waves
  • BBHs
  • binary black holes

Cite this

Abbott, B. P. ; Angelova, S. V. ; Birney, R. ; Macfoy, S. ; Reid, S. ; LIGO Scientific Collaboration ; Virgo Collaboration. / Search for eccentric binary black hole mergers with advanced LIGO and advanced Virgo during their first and second observing runs. In: Astrophysical Journal. 2019 ; Vol. 883, No. 2.
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Search for eccentric binary black hole mergers with advanced LIGO and advanced Virgo during their first and second observing runs. / Abbott, B. P.; Angelova, S. V.; Birney, R.; Macfoy, S.; Reid, S.; LIGO Scientific Collaboration; Virgo Collaboration.

In: Astrophysical Journal, Vol. 883, No. 2, 149, 30.09.2019.

Research output: Contribution to journalArticle

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AU - Reid, S.

AU - LIGO Scientific Collaboration

AU - Virgo Collaboration

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KW - LIGO

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