Bayesian Constraints on Hybrid Neutron-Star Equations of State with Nonlocal Chiral Quark Matter
A Bayesian workflow that constrains the dense-matter equation of state of neutron stars containing a quark-matter core. A hadronic phase is matched to a two-flavor color-superconducting quark phase from an instantaneous nonlocal chiral quark model, and the parameter posterior is inferred from massive-pulsar, NICER, and GW170817 tidal-deformability data, yielding the probability and size of a quark core and the predicted mass-radius and tidal-deformability relations.
2501.00115
The equation of state (EOS) relates pressure to density inside a neutron star and fixes its mass-radius relation, but the state of matter at the highest densities is unknown. This paper performs a ph…