Hybrid stars with large strange quark cores

TL;DR

This paper investigates the potential for hybrid stars with large strange quark cores by analyzing various multi-quark interactions and their impact on neutron star properties, showing such stars are consistent with current observations.

Contribution

It introduces a comprehensive analysis of multi-quark interactions in hybrid stars, demonstrating the viability of large strangeness content within observational constraints.

Findings

Hybrid stars with large strange quark cores are possible.

Neutron star properties depend on different quark interaction channels.

Current observations do not exclude the existence of such hybrid stars.

Abstract

The possible existence of hybrid stars is studied using several multi-quark interaction channels. The hadronic phase consists of an equation of state (EoS) with presently accepted nuclear matter properties and the quark model is constrained by the vacuum properties of several light mesons. The dependence of several NS properties on the different quark interactions is analyzed. We show that the present constraints from neutron star observations allow for the existence of hybrid stars with large strangeness content and large quark cores.