Speaker
Description
The softening of the equation of state of the neutron star matter upon the inclusion of hyperons, leading to a reduction in their maximum mass below the limit established by observations, named "hyperon puzzle" remains one of unresolved problems in the nuclear astrophysics. This work investigates the structure of neutron stars within the Skyrme approach. In contrast to previous studies within this framework, we include not only Λ-hyperons but also Ξ-hyperons in our consideration. A wide variety of parameters for nucleon-nucleon and hyperon-nucleon interactions is examined. Calculations of the macroscopic characteristics of neutron stars, including mass, radius, and tidal deformability, have been performed.
We study correlations between neutron star characteristics and potential properties, reflecting their sensitivity to the dynamics of baryonic interactions. A simple approximate relationship is proposed to estimate the neutron star maximum mass from the characteristics of baryonic interactions. The influence of Ξ-hyperons on the possible ranges of observable quantities is also demonstrated.
