Joint Bayesian inference of gravitational-wave and NICER data

ORAL

Abstract

We perform a joint, multi-messenger analysis of the neutron star equation of state by combining the gravitational-wave measurements of GW170817 with the measurements made by the Neutron Star Interior Composition Explorer (NICER) of PSR J0030+0451 and PSR J0740+6620. We develop a joint likelihood function that can simultaneously sample in the parameter space of the gravitational-wave and X-ray measurements. We incorporate models of the equation of state generated using chiral effective field theory into the joint GW/X-ray analysis. We sample the likelihood in equation of state and mass, which provides a direct measurement of chiral field theory equation of state.

*NSF grant nos. PHY 21-16686, PHY 2011655, PHY 2041878

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Presenters

  • Chaitanya Afle

    • Syracuse University

Authors

  • Chaitanya Afle

    • Syracuse University

  • Duncan A Brown

    • Syracuse University

  • Ingo Tews

    • Los Alamos National Laboratory

  • Collin Capano

    • Max Planck Institute for Gravitational P

  • Rahul Somasundaram

    • Syracuse University