Strange star equation of state fits the refined mass measurement of 12 pulsars and predicts their radii

TL;DR

This paper proposes a strange star equation of state based on a modified Richardson potential and density-dependent quark masses, successfully fitting observed pulsar masses and predicting their radii.

Contribution

It introduces a novel strange star equation of state that aligns with recent precise mass measurements and incorporates chiral symmetry restoration effects.

Findings

Fits observed pulsar masses accurately

Predicts radii consistent with observations

Supports the strange star model as a viable alternative

Abstract

There are three categories of stars whose masses have been found accurately in recent times: (1) two for which Shapiro delay is used which is possible due to GR light bending as the partner is heavy : PSR J1614-2230 and PSR J1903+0327 (2) six eclipsing stars for which numerical Roche Lobe geometry is used and (3) 3 stars for which spectroscopic methods are used and in fact for these three the mass and radii both are estimated. Motivated by large color (N_c) expansion using a modified Richardson potential, along with density dependent quark masses thereby allowing chiral symmetry restoration, we get compact strange stars fitting all the observed masses.