论文标题
陆生核实验的中子星质量和半径关系的新约束
New constraints on the neutron-star mass and radius relation from terrestrial nuclear experiments
论文作者
论文摘要
确定核物质的状态方程（EOS）一直是核天体物理学中最大的问题之一，因为EOS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，最近进行了几项核实验，例如S $π$ RIT和PERX-II协作报告。但是，由于它们的不确定性仍然很大，因此诸如天文观测之类的其他约束必须至关重要。另外，有趣的是看到其报告的价值对中子星特性的影响。在这项研究中，着眼于相对较低的密度区域，我们通过假设来自S $π$ RIT和PREX-II的约束来研究中子星质量和半径关系的允许区域。这些实验预测的每个区域仍然与受各种天文观测约束的允许区域一致。我们的结果表明，陆生核实验必须为中子星的EOS提供进一步的限制，从而补充天文观测。
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 S$π$RIT and PREX-II collaborations, have recently been performed. However, since their uncertainties are still large, additional constraints such as astronomical observations must be crucial. In addition, it is interesting to see the effect of their reported value on neutron star properties. In this study, focusing on the relatively lower density region, we investigate the allowed area of the neutron-star mass and radius relation by assuming the constraints from S$π$RIT 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.
