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Article Dans Une Revue Monthly Notices of the Royal Astronomical Society Année : 2020

Constraining the Gravitational-Wave Afterglow From a Binary Neutron Star Coalescence

Sharan Banagiri
  • Fonction : Auteur
Michael W. Coughlin
  • Fonction : Auteur
James Clark
Paul D. Lasky
  • Fonction : Auteur
Colm Talbot
  • Fonction : Auteur
Eric Thrane
  • Fonction : Auteur
Vuk Mandic
  • Fonction : Auteur

Résumé

Binary neutron star mergers are rich laboratories for physics, accessible with ground-based interferometric gravitational-wave detectors such as the Advanced LIGO and Advanced Virgo. If a neutron star remnant survives the merger, it can emit gravitational waves that might be detectable with the current or next generation detectors. The physics of the long-lived post-merger phase is not well understood and makes modelling difficult. In particular the phase of the gravitational-wave signal is not well modelled. In this paper, we explore methods for using long duration post-merger gravitational-wave signals to constrain the parameters and the properties of the remnant. We develop a phase-agnostic likelihood model that uses only the spectral content for parameter estimation and demonstrate the calculation of a Bayesian upper limit in the absence of a signal. With the millisecond magnetar model, we show that for an event like GW170817, the ellipticity of a long-lived remnant can be constrained to less than about 0.5 in the parameter space used.
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Dates et versions

hal-02317257 , version 1 (24-05-2024)

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Sharan Banagiri, Michael W. Coughlin, James Clark, Paul D. Lasky, M.A. Bizouard, et al.. Constraining the Gravitational-Wave Afterglow From a Binary Neutron Star Coalescence. Monthly Notices of the Royal Astronomical Society, 2020, 492 (4), pp.4945-4951. ⟨10.1093/mnras/staa181⟩. ⟨hal-02317257⟩
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