Accelerated detection of the binary neutron star gravitational-wave background

Francisco Hernandez Vivanco, Rory Smith, Eric Thrane, Paul D. Lasky

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Abstract

Most gravitational-wave signals from binary neutron star coalescences are too weak to be individually resolved with current detectors. We demonstrate how to extract a population of subthreshold binary neutron star signals using Bayesian parameter estimation. Assuming a merger rate of one signal every 2 hours, we find that this gravitational-wave background can be detected after approximately 3 months of observation with Advanced LIGO and Virgo at design sensitivity, versus several years using the standard cross-correlation algorithm. We show that the algorithm can distinguish different neutron star equations of state using roughly 7 months of Advanced LIGO and Virgo design-sensitivity data. This is in contrast to the standard cross-correlation method, which cannot.

Original languageEnglish
Article number043023
Number of pages6
JournalPhysical Review D
Volume100
Issue number4
DOIs
Publication statusPublished - 22 Aug 2019

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