论文标题
来自中子星合并的数值相对性模拟的动态弹射和磁盘质量
Mapping dynamical ejecta and disk masses from numerical relativity simulations of neutron star mergers
论文作者
论文摘要
我们提出了来自最大的数值相对性模拟样本的动力喷射性质和残留磁盘质量的拟合公式。所考虑的数据包括一些最新的模拟状态（EOS）和中微子转运的微物理核方程，以及文献中可用的多变态EOS的其他结果。我们的分析表明，可以通过拟合质量比和减少潮汐参数的拟合表达式来捕获动力弹射和磁盘性能的广泛特征。文献数据的比较分析表明，微物理学和中微子吸收对动力学射出特性有重大影响。状态的微物理核方程会导致平均速度小于多粒子EOS，而包括中微子吸收的速度则导致较大的平均喷射质量和电子分数。因此，对于二进制参数而言，微物理学和中微子转运对于获得射出的定量模型是必需的。
We present fitting formulae for the dynamical ejecta properties and remnant disk masses from the largest to date sample of numerical relativity simulations. The considered data include some of the latest simulations with microphysical nuclear equations of state (EOS) and neutrino transport as well as other results with polytropic EOS available in the literature. Our analysis indicates that the broad features of the dynamical ejecta and disk properties can be captured by fitting expressions that depend on mass ratio and reduced tidal parameter. The comparative analysis of literature data shows that microphysics and neutrino absorption have a significant impact on the dynamical ejecta properties. Microphysical nuclear equations of state lead to average velocities smaller than polytropic EOS, while including neutrino absorption results in larger average ejecta masses and electron fractions. Hence, microphysics and neutrino transport are necessary to obtain quantitative models of the ejecta in terms of the binary parameters.
