Hybrid Strangeon Stars

Abstract

It was conjectured that the basic units of the ground state of bulk strong matter may be strange-clusters called strangeons, and they can form self-bound strangeon stars that are highly compact. Strangeon stars can develop a strange quark matter (SQM) core at high densities, particularly in the color-flavor-locking phase, yielding a branch of hybrid strangeon stars. We explore the stellar structure and astrophysical implications of hybrid strangeon stars. We find that hybrid strangeon stars can meet various astrophysical constraints on pulsar masses, radii, and tidal deformabilities. Finally, we show that the strangeon-SQM mixed phase is not preferred if the charge-neutrality condition is imposed at the strangeon-SQM transition region.

arXiv comment11 pages, 5 figures. Published version

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• Universal relations for anisotropic interacting quark stars
• Bayesian inference of strangeon matter using the measurements of PSR J0437-4715 and GW190814
• On the energy budget of starquake-induced repeating fast radio bursts
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• Strange Matter
• The role of equation of state on the spin-up of millisecond pulsars