This research paper complements our earlier qualitative study of the effect of viscosity and thermal conductivity on the radial oscillation and relaxation of non-rotating neutron stars. The fundamental and first two lowest-frequency excited modes of radial oscillation have been computed in the high nuclear density regime for a set of seven realistic equations of state (EoS) as functions of central energy density. Various types of zero-temperature EoS of cold nucleonic and hybrid nucleon–hyperon–quark matter models are used in the inner core to determine the internal structure in and around the hydrostatic equilibrium states and investigate the influence of each EoS on the dynamical behavior of non-rotating neutron stars. We confirm the principal results of earlier, related studies that suggest an underlying correlation between the frequency spectrum of the fundamental oscillation mode and the variation of the adiabatic index over the high nuclear-density regime. We provide valuable information to impose further constraints on the plausible set of realistic EoS models, in addition to the practical applications for the rapidly evolving field of asteroseismology of compact objects.

这篇研究论文补充了我们早先关于粘度和热导率对非旋转中子星径向振荡和弛豫的影响的定性研究。径向振荡的基本和前两个最低频率激发模式已在高核密度范围内计算为一组七个实际状态方程 (EoS) 作为中心能量密度的函数。在内核中使用冷核子和混合核子-超子-夸克物质模型的各种类型的零温度 EoS 来确定流体静力平衡状态及其周围的内部结构，并研究每个 EoS 对非核动力学行为的影响。 - 旋转中子星。我们确认了之前的主要结果，相关研究表明，基本振荡模式的频谱与高核密度范围内绝热指数的变化之间存在潜在相关性。我们提供了有价值的信息，除了对快速发展的致密天体星震学领域的实际应用之外，还可以对真实的 EoS 模型集施加进一步的限制。