Search for eccentric NSBH and BNS mergers in the third observing run of Advanced LIGO and Virgo

Abstract

The possible formation histories of neutron star binaries remain unresolved by current gravitational-wave catalogs. The detection of an eccentric binary system could be vital in constraining compact binary formation models. We present the first search for aligned spin eccentric neutron star-black hole binaries (NSBH) and the most sensitive search for aligned-spin eccentric binary neutron star (BNS) systems using data from the third observing run of the advanced LIGO and advanced Virgo detectors. No new statistically significant candidates are found; we constrain the local merger rate for specific astrophysical models to be less than 150 ${\text{Gpc}}^{-3}{\text{yr}}^{-1}$ for binary neutron stars in the field, and, 50, 100, and 70 ${\text{Gpc}}^{-3}{\text{yr}}^{-1}$ for neutron star-black hole binaries in globular clusters, hierarchical triples and nuclear clusters, respectively, at the 90$\%$ confidence level if we assume that no sources have been observed from these populations. We predict the capabilities of upcoming and next-generation observatory networks; we investigate the ability of three LIGO (${\text{A}}^{\#}$) detectors and Cosmic Explorer CE (20km) + CE (40km) to use eccentric binary observations for determining the formation history of neutron star binaries. We find that 2 -- 100 years of observation with three ${\text{A}}^{\#}$ observatories are required before we observe clearly eccentric NSBH binaries; this reduces to only 10 days -- 1 year with the CE detector network. CE will observe tens to hundreds of measurably eccentric binaries from each of the formation models we consider.

8 pages, 3 figures. Data release at https://github.com/rahuldhurkunde/Eccentric-search-O3

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Cited by in corpus (12)

• Time-domain phenomenological multipolar waveforms for aligned-spin binary black holes in elliptical orbits
• Eccentricity signatures in LIGO-Virgo-KAGRA's BNS and NSBH binaries
• Eccentricity evolution consistency test to distinguish eccentric gravitational-wave signals from eccentricity mimickers
• Search for gravitational waves from eccentric binary black holes with an effective-one-body template
• Detection of GW200105 with a targeted eccentric search
• Testing modified gravity with the eccentric neutron star--black hole merger GW200105
• Gravitational waves from eccentric binary neutron star mergers: Systematic biases and inadequacy of quasicircular templates
• Can Eccentric Binary Black Hole Signals Mimic Gravitational-Wave Microlensing?
• Systematic bias due to eccentricity in parameter estimation for merging binary neutron stars : Spinning case
• labrador: A domain-optimized machine-learning tool for gravitational wave inference
• Early Warning From Eccentric Compact Binaries: Template Initialization And Sub-dominant Mode Effects
• Trails of clouds in binary black holes