Speaker
Description
The presence of hyperons in high-density astrophysical environments, such as supernova cores and neutron stars, significantly affects their equation of state (EoS) and overall structure. At extreme densities and temperatures, hyperons are expected to emerge, softening the EoS and influencing the evolution of (proto) neutron stars. However, this softening leads to the so-called hyperon puzzle, which refers to the challenge of reconciling hyperon-rich EoS with observations of two-solar-mass neutron stars. Understanding the role of hyperon interactions is therefore crucial for constructing a realistic EoS applicable to both neutron stars and core-collapse supernovae.
In this study, we investigate the role of two-body and three-body forces acting on \Lambda hyperons in the dynamical core-collapse simulations of massive stars as well as in neutron stars. We analyze how these interactions influence the dynamics of collapsing massive stars and the hyperon fraction in supernova cores. Our results systematically examine the impact of uncertainties in hyperon interactions on astrophysical phenomena and explore the potential for observations to provide constraints on these interactions.
