Density dependent quark mass model revisited: Thermodynamic consistency, stability windows and stellar properties

TL;DR

This paper revisits a density dependent quark model, ensuring thermodynamic consistency, exploring stability conditions, and applying it to predict stellar properties consistent with observations of massive stars.

Contribution

It provides a thermodynamically consistent analysis of a density dependent quark model and applies it to determine stable quark matter and stellar characteristics.

Findings

Identifies stability windows for absolutely stable quark matter.

Calculates strange star masses and radii compatible with observations.

Ensures thermodynamic consistency of the density dependent quark model.

Abstract

In this work a density dependent quark model is revisited, its thermodynamic consistency checked and the stability window for absolutely stable quark matter obtained. The hypotheses of both pure quark matter with equal quark chemical potentials and stellar matter subject to chemical stability and charge neutrality are investigated. The parameters that appear in the density dependent mass and satisfy the Bodmer-Witten conjecture are then used to compute the masses and radii of strange stars. We show that the obtained values are compatible with the recently observed massive stars.