Strange stars with different quark mass scalings

TL;DR

This study explores how different quark mass scalings affect the stability, structure, and observable properties of strange stars, revealing significant impacts on maximum mass, radius, rotation, and surface electric fields.

Contribution

It systematically analyzes the effects of various quark mass scalings on strange star properties, providing new insights into their stability and astrophysical signatures.

Findings

Maximum mass ranges between 1.5 and 1.8 solar masses.

Larger quark mass scaling leads to smaller radii and faster rotation.

Surface electric fields vary by an order of magnitude with scaling.

Abstract

We investigate the stability of strange quark matter and the properties of the corresponding strange stars, within a wide range of quark mass scaling. The calculation shows that the resulting maximum mass always lies between 1.5 solor mass and 1.8 solor mass for all the scalings chosen here. Strange star sequences with a linear scaling would support less gravitational mass, and a change (increase or decrease) of the scaling around the linear scaling would lead to a larger maximum mass. Radii invariably decrease with the mass scaling. Then the larger the scaling, the faster the star might spin. In addition, the variation of the scaling would cause an order of magnitude change of the strong electric field on quark surface, which is essential to support possible crusts of strange stars against gravity and may then have some astrophysical implications.