Studies of two-solar-mass hybrid stars within the framework of Dyson-Schwinger equations

TL;DR

This paper develops a quark matter equation of state using Dyson-Schwinger equations to model hybrid stars, demonstrating the possibility of two-solar-mass stars with softer quark EOSs through a novel crossover approach.

Contribution

Introduces a new method to construct two-solar-mass hybrid stars with softer quark EOSs using Dyson-Schwinger equations and crossover strategies.

Findings

Successful modeling of two-solar-mass hybrid stars with soft quark EOSs

Comparison of different crossover strategies for hybrid star EOSs

Demonstration of the viability of softer quark matter in massive stars

Abstract

In this paper we introduce an equation of state (EOS) of quark matter within the framework of Dyson-Schwinger equations (DSEs) to study the structure of compact stars. The smooth crossover from hadronic matter to quark matter in the hybrid star is studied. We compare different strategies to obtain crossover EOSs and find a new way to construct two-solar-mass hybrid stars with even a relatively soft quark EOS, while earlier works show that the quark EOS should be stiff enough to support a massive hybrid star.