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首页> 外文期刊>Physical review, C >Open-source nuclear equation of state framework based on the liquid-drop model with Skyrme interaction
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Open-source nuclear equation of state framework based on the liquid-drop model with Skyrme interaction

机译：基于斯基尔梅交互的液滴模型的国家框架开源核方程

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The equation of state (EOS) of dense matter is an essential ingredient for numerical simulations of core-collapse supernovae and neutron star mergers. The properties of matter near and above nuclear saturation density are uncertain, which translates into uncertainties in astrophysical simulations and their multimessenger signatures. Therefore, a wide range of EOSs spanning the allowed range of nuclear interactions are necessary for determining the sensitivity of these astrophysical phenomena and their signatures to variations in input microphysics. We present a new set of finite temperature EOSs based on experimentally allowed Skyrme forces. We employ a liquid-drop model of nuclei to capture the nonuniform phase of nuclear matter at subsaturation density, which is blended into a nuclear statistical equilibrium EOS at lower densities. We also provide a new, open-source code for calculating EOSs for arbitrary Skyrme parametrizations. We then study the effects of different Skyrme parametrizations on thermodynamical properties of dense astrophysical matter, the neutron star mass-radius relationship, and the core collapse of 15 and 40 solar mass stars.
机译：稠密物质的状态方程（EOS）是核坍缩超新星和中子星合并数值模拟的重要组成部分。核饱和密度附近和以上的物质性质是不确定的，这在天体物理模拟及其多信使信号中转化为不确定性。因此，为了确定这些天体物理现象及其特征对输入微物理变化的敏感性，有必要在允许的核相互作用范围内建立广泛的物态方程。我们提出了一套新的基于实验允许的Skyrme力的有限温度状态方程。我们采用核液滴模型来捕获核物质在亚饱和密度下的非均匀相，并将其混合到低密度下的核统计平衡状态方程中。我们还提供了一个新的开源代码，用于计算任意Skyrme参数化的EOS。然后，我们研究了不同Skyrme参数化对稠密天体物理物质热力学性质、中子星质量-半径关系以及15和40颗太阳质量恒星的核心坍缩的影响。

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