Observable Signatures of Quarkyonic Phase in Neutron Stars

2025/10/27 by Kalita, Probit J, Malik, Tuhin, Zhao, Tianqi +2 · 1 citation
#FOS: Physical sciences #General Relativity and Quantum Cosmology (gr-qc) #High Energy Astrophysical Phenomena (astro-ph.HE) #Nuclear Theory (nucl-th)

paper · doi:10.48550/arxiv.2510.23405

Abstract

In this letter, we perform Bayesian inference on quarkyonic equation-of-state models and find they remain viable under all current astrophysical constraints. Crucially, we identify a novel observational diagnostic: the slope of the M-R relation at fixed mass versus the central sound speed. Quarkyonic stars occupy a distinct region (high central c_s² and positive (dR)/(dM)) from purely nucleonic stars. This could be tested by future radius measurements of two stars of different mass. Our results indicate that if a neutron star falls in the quarkyonic region, it would be strong evidence for quarkyonic matter in its core.

Citations

• A Bayesian Inference of Hybrid Stars with Large Quark Cores
• Stellar properties indicating the presence of hyperons in neutron stars
• Detectability and Parameter Estimation for Einstein Telescope Configurations with GWJulia
• Evolution of strangeness and hyperons in quarkyonic matter

Cited by

• Thermal Quarkyonic Matter and Its Implications for Neutron Star Structure
• Stellar properties indicating the presence of hyperons in neutron stars

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• Bayesian inference favors quark matter in neutron star interiors