Hybrid star construction with the extended linear sigma model: preliminary results

TL;DR

This paper explores hybrid star models with a focus on the core's quark matter using the extended linear sigma model, aiming to unify nuclear and quark matter descriptions in compact stars.

Contribution

It introduces two approaches for composite models of hybrid stars and applies the extended linear sigma model to describe quark matter in the core.

Findings

Preliminary results on hybrid star configurations.

Comparison of different composite modeling approaches.

Insights into the phase structure of dense matter.

Abstract

The interior of compact stars is usually divided into two major parts, the outer part called crust and the inner part called core. There are several possibilities for the composition of these parts. One is a hybrid star, in which the crust contains nuclear matter, while the inner core contains quark matter. Since at large baryon densities one can work with effective models, and nuclear and quark matter are usually described by different models, some unification of the two parts is needed. We show two different approaches for a composite model and some recent developments in hybrid star constructions using the extended linear sigma model for modeling the quark matter at the core.