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Discrepancy in tidal deformability of GW170817 between the Advanced LIGO twin detectors
High Energy Astrophysical Phenomena · Submitted 14 Dec 2018
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim We find that the Hanford and Livingston detectors of Advanced LIGO derive a distinct posterior probability distribution of binary tidal deformability tilde{Lambda} of the first binary-neutron-star merger GW170817.
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We find that the Hanford and Livingston detectors of Advanced LIGO derive a distinct posterior probability distribution of binary tidal deformability tilde{Lambda} of the first binary-neutron-star merger GW170817. By analyzing public data of GW170817 with a nested-sampling engine and the default TaylorF2 waveform provided by the LALInference package, the probability distribution of the binary tidal deformability derived by the LIGO-Virgo detector network turns out to be determined dominantly by the Hanford detector. Specifically, by imposing the flat prior on tidal deformability of individual stars, symmetric 90% credible intervals of tilde{Lambda} are estimated to be 527^{+619}_{-345} with the Hanford detector, 927^{+522}_{-619} with the Livingston detector, and 455^{+668}_{-281} with the LIGO-Virgo detector network. Furthermore, the distribution derived by the Livingston detector changes irregularly when we vary the maximum frequency of the data used in the analysis. This feature is not observed for the Hanford detector. While they are all consistent, the discrepancy and irregular behavior suggest that an in-depth study of noise properties might improve our understanding of GW170817 and future events.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | We find that the Hanford and Livingston detectors of Advanced LIGO derive a distinct posterior probability distribution of binary tidal deformability tilde{Lambda} of the first binary-neutron-star merger GW170817. | result 0.99 | 0.96 | 0.70 | asserted 1.00 |
| s1 | By analyzing public data of GW170817 with a nested-sampling engine and the default TaylorF2 waveform provided by the LALInference package, the probability distribution of the binary tidal deformability derived by the LIGO-Virgo detector network turns out to be determined dominantly by the Hanford detector. | result 0.68 | 0.90 | 0.31 | asserted 1.00 |
| s2 | Specifically, by imposing the flat prior on tidal deformability of individual stars, symmetric 90% credible intervals of tilde{Lambda} are estimated to be 527^{+619}_{-345} with the Hanford detector, 927^{+522}_{-619} with the Livingston detector, and 455^{+668}_{-281} with the LIGO-Virgo detector network. | result 1.00 | 0.93 | 0.22 | asserted 1.00 |
| s3 | Furthermore, the distribution derived by the Livingston detector changes irregularly when we vary the maximum frequency of the data used in the analysis. | result 1.00 | 0.94 | 0.07 | asserted 1.00 |
| s4 | This feature is not observed for the Hanford detector. | result 1.00 | 0.88 | 0.05 | asserted 1.00 |
| s5 | While they are all consistent, the discrepancy and irregular behavior suggest that an in-depth study of noise properties might improve our understanding of GW170817 and future events. | interpretation 0.67 | 0.63 | 0.66 | hedged possibility 0.66 |
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Original abstract
We find that the Hanford and Livingston detectors of Advanced LIGO derive a distinct posterior probability distribution of binary tidal deformability tilde{Lambda} of the first binary-neutron-star merger GW170817. By analyzing public data of GW170817 with a nested-sampling engine and the default TaylorF2 waveform provided by the LALInference package, the probability distribution of the binary tidal deformability derived by the LIGO-Virgo detector network turns out to be determined dominantly by the Hanford detector. Specifically, by imposing the flat prior on tidal deformability of individual stars, symmetric 90% credible intervals of tilde{Lambda} are estimated to be 527^{+619}_{-345} with the Hanford detector, 927^{+522}_{-619} with the Livingston detector, and 455^{+668}_{-281} with the LIGO-Virgo detector network. Furthermore, the distribution derived by the Livingston detector changes irregularly when we vary the maximum frequency of the data used in the analysis. This feature is not observed for the Hanford detector. While they are all consistent, the discrepancy and irregular behavior suggest that an in-depth study of noise properties might improve our understanding of GW170817 and future events.
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References
How the literature uses it
12 arXiv papers cite this in 24 sentences
Papers citing it · 18 sentences without a confident label
Uses its method or tool 1 paper
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In our analyses, we use the EOS-insensitive relations between tidal deformability and spin-induced quadrupole moment called Love-Q relations predicted by theoretical studies [ref] , which have been used in Refs. [ref] .
Follow-up analyses of the binary-neutron-star signals GW170817 and GW190425 by using post-Newtonian waveform models · Source parameters and their priors · 0.99
Uses its data or values 2 papers
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The upper bound on the binary tidal deformability $Λ̃$ by GW170817 is about 800 by using the model for the low-spin prior and the upper frequency cutoff $2048 Hz$ [ref] (see also Refs. [ref] for reanalysis).
Follow-up analyses of the binary-neutron-star signals GW170817 and GW190425 by using post-Newtonian waveform models · Tidal deformability · 0.99
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The upper bound on the binary tidal deformability $Λ̃$ by GW170817 is about 900 [ref] (see also Refs. [ref] for reanalysis).
Gravitational-wave constraints on the GWTC-2 events by measuring the tidal deformability and the spin-induced quadrupole moment · Tidal deformability · 0.99
Cites it as support 1 paper
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One should mention that inconsistencies in the LIGO-Livingston data at different GW frequencies have been also found in the Bayesian estimation of the binary tidal deformability $Λ̃$ [ref] .
GW170817 event rules out general relativity in favor of vector gravity · Comment on LIGO-Virgo polarization analysis of GW170817 · 0.96
Cites it as background 2 papers
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The post-Newtonian (PN) tidal waveform of compact binary coalescences for the mass quadrupole have been derived up to 2.5PN (relative 7.5PN) order for phase [ref] and have used in analyses of binary neutron star (BNS) coalescence signals detected by the Advanced LIGO and Advanced Virgo detectors, GW170817 and/or GW190425 [ref] (see also Refs. [ref] ).
Multipole tidal effects in the post-Newtonian gravitational-wave phase of compact binary coalescences · Introduction · 0.93
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For the binary-neutron-star mergers, most analyses of GW170817 and GW190425 focus on measuring the tidal deformability using the EOS-insensitive relations between tidal deformability and SIQM called Love-Q relations predicted by theoretical studies [ref] .
Gravitational-wave constraints on the GWTC-2 events by measuring the tidal deformability and the spin-induced quadrupole moment · Introduction · 0.87
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