New constraints on the neutron-star mass and radius relation from terrestrial nuclear experiments
New constraints on the neutron-star mass and radius relation from terrestrial nuclear experiments
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地面核实验对中子星质量和半径关系的新约束
DOI：
10.1093/ptep/ptac055
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发表时间：
2022
影响因子：
3.5
通讯作者：
Naito Tomoya
中科院分区：
文献类型：
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作者：
Sotani Hajime;Nishimura Nobuya;Naito Tomoya
核物质状态方程的确定一直是核天体物理中最大的问题之一，因为状态方程对于确定中子星的性质至关重要。为了限制核对称能的密度依赖性，几个核实验，例如，由SπRIT和PREX-II合作组织报道，最近已经进行了。然而，由于它们的不确定性仍然很大，天文观测等其他限制因素至关重要。此外，有趣的是看到他们的报告值对中子星性质的影响。在本研究中，我们在SπRIT和PREX-II的约束条件下，对相对低密度区域的中子星质量和半径关系的允许区域进行了研究.这些实验预测的每个区域仍然与各种天文观测所限制的允许区域一致。我们的研究结果表明，地球核实验必须提供进一步的限制，中子星的EOS，补充天文观测。
The determination of the equation of state (EOS) for nuclear matter has been one of the biggest problems in nuclear astrophysics, because the EOS is essential for determining the properties of neutron stars. To constrain the density dependence of the nuclear symmetry energy, several nuclear experiments, e.g., reported by the SπRIT and PREX-II Collaborations, have recently been performed. However, since their uncertainties are still large, additional constraints such as astronomical observations are crucial. In addition, it is interesting to see the effect of their reported values on neutron-star properties. In this study, focusing on a relatively lower-density region, we investigate the allowed area of the neutron-star mass and radius relation by assuming the constraints from SπRIT and PREX-II. Each region predicted by these experiments is still consistent with the allowed area constrained by the various astronomical observations. Our results show that terrestrial nuclear experiments must provide further constraints on the EOS for neutron stars, complementing astronomical observations.