Modeling Hybrid Stars

TL;DR

This paper models hybrid stars with cores of deconfined quarks using an extended SU(3) chiral model, demonstrating the ability to produce massive stars at zero temperature despite hyperon inclusion.

Contribution

It introduces an extended SU(3) chiral model to describe the transition from hadronic to quark matter in hybrid stars.

Findings

Successfully reproduces massive hybrid stars at zero temperature.

Natural transition from hadrons to quarks with increasing temperature/density.

Maintains star mass despite hyperon presence.

Abstract

We study the so called hybrid stars, which are hadronic stars that contain a core of deconfined quarks. For this purpose, we make use of an extended version of the SU(3) chiral model. Within this approach, the degrees of freedom change naturally from hadrons (baryon octet) to quarks (u, d, s) as the temperature and/or density increases. At zero temperature we are still able to reproduce massive stars, even with the inclusion of hyperons.