Strange quark matter and quark stars with the Dyson-Schwinger quark model

TL;DR

This paper models strange quark matter and quark stars using the Dyson-Schwinger approach, revealing maximum masses around 1.9 solar masses and potential energy releases from star conversion.

Contribution

It introduces a Dyson-Schwinger quark model with stability constraints to study the structure and properties of strange quark stars.

Findings

Maximum star mass ~1.9 solar masses

Radii range 9-11 km

Energy release up to 3.6 x 10^{53} erg

Abstract

We calculate the equation of state of strange quark matter and the interior structure of strange quark stars in a Dyson-Schwinger quark model within rainbow or Ball-Chiu vertex approximation. We emphasize constraints on the parameter space of the model due to stability conditions of ordinary nuclear matter. Respecting these constraints, we find that the maximum mass of strange quark stars is about 1.9 solar masses, and typical radii are 9 --11 km. We obtain an energy release as large as $3.6 \times 10^{53}\,\text{erg}$ from conversion of neutron stars into strange quark stars.