Multimessenger parameter estimation of GW170817

David Radice, Liang Dai

Research output: Contribution to journalArticlepeer-review

150 Scopus citations


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 NS is found to be 12.2-0.8+1.0±0.2 km (statistical and systematic uncertainties).

Original languageEnglish (US)
Article number50
JournalEuropean Physical Journal A
Issue number4
StatePublished - Apr 1 2019

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics


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