Towards inference of overlapping gravitational wave signals

Abstract

Merger rates of binary black holes, binary neutron stars, and neutron star-black hole binaries in the local Universe (i.e., redshift $z=0$), inferred from the Laser Interferometer Gravitational Wave Observatory (LIGO) and Virgo, are $16-130{\mathrm{Gpc}}^{-3}{\mathrm{yr}}^{-1}$, $13-1900{\mathrm{Gpc}}^{-3}{\mathrm{yr}}^{-1}$, and $7.4-320{\mathrm{Gpc}}^{-3}{\mathrm{yr}}^{-1}$, respectively. These rates suggest that there is a significant chance that two or more of these signals will overlap with each other during their lifetime in the sensitivity-band of future gravitational-wave detectors such as the Cosmic Explorer and Einstein Telescope. The detection pipelines provide the coalescence time of each signal with an accuracy $\mathcal{O}(10\mathrm{ms})$. We show that using a prior on the coalescence time from a detection pipeline, it is possible to correctly infer the properties of these overlapping signals with the current data-analysis infrastructure. We study different configurations of two overlapping signals created by non-spinning binaries, varying their time and phase at coalescence, as well as their signal-to-noise ratios. We conclude that, for the scenarios considered in this work, parameter inference is robust provided that their coalescence times in the detector frame are more than $\sim 1-2\mathrm{s}$. Signals whose coalescence epochs lie within $\sim 0.5\mathrm{s}$ of each other suffer from significant biases in parameter inference, and new strategies and algorithms would be required to overcome such biases.

13 pages, 5 figures, 1 table; accepted for publication in PRD

References in corpus (15)

• Advanced Virgo: a 2nd generation interferometric gravitational wave detector
• Advanced LIGO
• Robust parameter estimation for compact binaries with ground-based gravitational-wave observations using the LALInference software library
• Scientific Objectives of Einstein Telescope
• BayesWave: Bayesian Inference for Gravitational Wave Bursts and Instrument Glitches
• A Horizon Study for Cosmic Explorer: Science, Observatories, and Community
• The BayesWave analysis pipeline in the era of gravitational wave observations
• The Mock LISA Data Challenges: from Challenge 3 to Challenge 4
• Global Analysis of the Gravitational Wave Signal from Galactic Binaries
• A Solution to the Galactic Foreground Problem for LISA
• Gravitational-wave confusion background from cosmological compact binaries: Implications for future terrestrial detectors
• Biases in parameter estimation from overlapping gravitational-wave signals in the third generation detector era
• Listening to the Universe with Next Generation Ground-Based Gravitational-Wave Detectors
• Modeling compact binary signals and instrumental glitches in gravitational wave data
• Parameter Estimation Bias From Overlapping Binary Black Hole Events In Second Generation Interferometers

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