Constraints on the neutron star equation of state from AT2017gfo using radiative transfer simulations
By M. Coughlin, Tim Dietrich, Zoheyr Doctor, D. Kasen, S. Coughlin, A. Jerkstrand, G. Leloudas, O. McBrien, B. Metzger, R. O’Shaughnessy and 1 more. Monthly notices of the Royal Astronomical Society, 2018
177 citations recorded by the source corpus.
The detection of the binary neutron star merger GW170817 together with the observation of electromagnetic counterparts across the entire spectrum inaugurated a new era of multimessenger astronomy. In this study, we incorporate wavelength-dependent opacities and emissivities calculated from atomic-structure data enabling us to model both the measured light curves and spectra of the electromagnetic transient AT2017gfo. Best fits of the observational data are obtained by Gaussian Process Regression, which allows us to present posterior samples for the kilonova and source properties connected to GW170817. Incorporating constraints obtained from the gravitational wave signal measured by the LIGO-Virgo Scientific Collaboration, we present a $90{{\ \rm per\ cent}}$ upper bound on the mass ratio q ≲ 1.38 and a lower bound on the tidal deformability of $\tilde{\Lambda } \gtrsim 197$, which rules out sufficiently soft equations of state. Our analysis is a path-finder for more realistic kilonova models and shows how the combination of gravitational wave and electromagnetic measurements allow for stringent constraints on the source parameters and the supranuclear equation of state.
Subfields: Astronomy and Astrophysics
View Paper: https://www.semanticscholar.org/paper/b6384a7afc32d5b241f4581958b72f0351289d7a
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In Astronomy and Astrophysics
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Citations in the corpus
- Binary Neutron Star Mergers: Mass Ejection, Electromagnetic Counterparts, and Nucleosynthesis (2018, methodology): “The resulting fits have been used in Abbott et al. (2017b) to estimate the contribution of the dynamical ejecta to the kilonova that followed GW170817 and, more recently, by Coughlin et al. (2018) to constrain the tidal deformability of the binary progenitor to GW170817.”
- Stellar structure models in modified theories of gravity: Lessons and challenges (2019, methodology): “ic EOS [421]), further supported by the analysis of [422] yielding the neutron star radius r S . 13km (90% confidence level), which in turns allows to rule out sufficiently soft EOS in the context of GR [423], as well as to obtain the information encoded in the change of the gravitational wave phase ca”
- 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).”