Strange stars with a mirror-dark-matter core confronting with the observations of compact stars

TL;DR

This paper explores how strange stars with a mirror-dark-matter core can explain various observations of compact stars, suggesting the presence of dark matter inside such stars based on the MIT bag model.

Contribution

It demonstrates that including a mirror-dark-matter core in strange stars can reconcile observational data from different compact stars.

Findings

Mirror-dark-matter cores are necessary to explain GW170817 observations.

Standard MIT bag model supports dark matter cores inside strange stars.

Observations of PSR J0740+6620 and PSR J0030+0451 do not require dark matter cores.

Abstract

We investigate the structure and the tidal deformability of strange stars (SSs) with a mirror-dark-matter (MDM) core for the standard MIT bag model. We find that to explain the observations of PSR J0740+6620, PSR J0030+0451 and GW170817 simultaneously, SSs in GW170817 should have a MDM core although it is unnecessary for PSR J0740+6620 and PSR J0030+0451 to contain a MDM core. Our study leads to the result that for the standard MIT bag model, the observations of compact stars mentioned above confirm the existence of a dark-matter core inside SSs.