Constraint on the symmetry energy at high densities from neutron star observations using relativistic mean-field models

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发表日期：

2025年6月3日

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Ying Cui,
Yuan Tian,
Cheng-Jun Xia,
Ying-Xun Zhang,
Zhu-Xia Li

摘要

In this paper, we constrain the symmetry energy at high densities in nuclear matter using recent observations of neutron stars based on the calculations of relativistic mean-field models. Using the observations of the neutron stars, we obtain the constraint on the symmetry energy at high densities, $S(2\rho _0) =40.54\pm$ $S (2 ρ_{0}) = 40.54 \pm$ 12.47 MeV, and $S(3\rho _0) =44.12\pm$ $S (3 ρ_{0}) = 44.12 \pm$ 29.38 MeV.