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Combining Electromagnetic and Gravitational-Wave Constraints on Neutron-Star Masses and Radii

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arxiv 2008.12817 v2 pith:UTZ22DJH submitted 2020-08-28 astro-ph.HE astro-ph.SRnucl-th

classification astro-ph.HEastro-ph.SRnucl-th
keywords neutron-starelectromagneticobservationsx-rayconstraintsdatagravitational-waveimpact
verification ladder T0 review T1 audit T2 compute T3 formal
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We perform a joint Bayesian inference of neutron-star mass and radius constraints based on GW170817, observations of quiescent low-mass X-ray binaries (QLMXBs), photospheric radius expansion X-ray bursts (PREs), and X-ray timing observations of J0030+0451. With this data set, the form of the prior distribution still has an impact on the posterior mass-radius (MR) curves and equation of state (EOS), but this impact is smaller than recently obtained when considering QLMXBs alone. We analyze the consistency of the electromagnetic data by including an "intrinsic scattering" contribution to the uncertainties, and find only a slight broadening of the posteriors. This suggests that the gravitational-wave and electromagnetic observations of neutron-star structure are providing a consistent picture of the neutron-star mass-radius curve and the EOS.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Towards constraining QCD phase transitions in neutron star interiors: Bayesian Inference with TOV linear response analysis

    nucl-th 2025-01 conditional novelty 6.0 of 10

    A Bayesian framework with analytical TOV linear-response gradients and a neural-network equation of state reconstructs neutron star EoSs and constrains first-order phase transition parameters from simulated mass-radius data.

  2. Fast and Accurate Prediction of Neutron Star Structure with Deep Neural Networks

    astro-ph.HE 2026-08 conditional novelty 3.0 of 10

    Feedforward and residual neural networks predict neutron star observables from piecewise polytropic EOS parameters with R^2>0.999 and a ~200x speedup over direct TOV integration.

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