Multimessenger parameter estimation of GW170817

By David Radice, Liang Dai. European Physical Journal A, 2018

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Abstract.We combine gravitational wave (GW) and electromagnetic (EM) data to perform a Bayesian parameter estimation of the binary neutron star (NS) merger GW170817. The EM likelihood is constructed from a fit to a large number of numerical relativity simulations which we combine with a lower bound on the mass of the remnant’s accretion disk inferred from the modeling of the EM light curve. In comparison with previous works, our analysis yields a more precise determination of the tidal deformability of the binary, for which the EM data provide a lower bound, and of the mass ratio of the binary, with the EM data favoring a smaller mass asymmetry. The 90% credible interval for the areal radius of a $ 1.4 M_\odot$1.4M⊙ NS is found to be $ 12.2^{+1.0}_{-0.8} \pm 0.2$12.2-0.8+1.0±0.2 km (statistical and systematic uncertainties).

Subfields: Astronomy and Astrophysics, Geophysics

View Paper: https://www.semanticscholar.org/paper/d2a127299eba00ebd5308be87e718d86c74558cf

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Citations in the corpus

Constraining the Dense Matter Equation of State with Joint Analysis of NICER and LIGO/Virgo Measurements (2019, background): “A number of studies have further included additional constraints from the electromagnetic counterparts assuming a NS-NS progenitor (Bauswein et al. 2017; Gao et al. 2017; Coughlin et al. 2018; Most et al. 2018; Capano et al. 2020; Margalit & Metzger 2019; Radice & Dai 2019; Shibata et al. 2019).”
On the Sound Speed in Neutron Stars (2022, background): “4< 13.45 km) and slightly larger, but well within the error bars of the estimates by Huth et al. (2021; see also Abbott et al. 2018; Radice & Dai 2019; Capano et al. 2020; Dietrich et al. 2020; Biswas et al. 2021, for similar estimates).”
Stringent constraints on neutron-star radii from multimessenger observations and nuclear theory (2019, methodology): “Radice and Dai [1] imposed a lower limit on the tidal polarizability of the merging neutron stars based on arguments that the mass surrounding the remnant after merger (and that can subsequently become unbound and contribute to the kilonova through secular disk winds [3, 4, 5, 6]) is strongly correl”