Speaker
Description
We perform a Bayesian inference of the neutron star equation of state (EoS) including Δ-resonances, hyperons, and nucleons within a density-dependent relativistic hadron (DDRH) model. Using constraints from nuclear saturation properties, chiral effective field theory (χEFT), and astrophysical observations, we systematically investigate the impact of Δ-baryons on neutron star structure. Our EoS models are compatible with tidal deformability measurements from GW170817. Additionally, the presence of Δ-resonances enables a natural description of the low-mass compact object observed in HESS J1731-347. We further analyze the quasi-normal f-mode oscillations within a fully relativistic framework, highlighting strong correlations between the f-mode frequency, stellar compactness, and tidal deformability, offering potential observational signatures of the dense matter composition.
