Fundamental and higher-order excited modes of radial oscillation of neutron stars for various types of cold nucleonic and hyperonic matter
Fundamental and higher-order excited modes of radial oscillation of neutron stars for various types of cold nucleonic and hyperonic matter
复制标题
各类冷核子和超子物质中子星径向振荡的基本和高阶激发模式
DOI：
10.1088/1361-6382/ac12e2
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发表时间：
2019
影响因子：
3.5
通讯作者：
D. Barta
中科院分区：
文献类型：
--
作者：
D. Barta
这篇研究论文补充了我们早期关于粘度和导热率对非旋转中子星径向振荡和弛豫影响的定性研究。径向振荡的基本模式和前两个最低频率激发模式已经在高核密度范围内计算了一组七个实际状态方程（EoS）作为中心能量密度的函数。在内核中使用各种类型的冷核子和混合核子-超子-夸克物质模型的零温EoS来确定流体静力平衡状态及其周围的内部结构，并研究每种EoS对非旋转中子星动力学行为的影响。我们证实了早期相关研究的主要结果，这些研究表明基本振荡模式的频谱与高核密度区域绝热指数的变化之间存在潜在的相关性。除了快速发展的致密天体星震学领域的实际应用之外，我们还提供了有价值的信息，对一组合理的现实 EoS 模型施加进一步的限制。
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.
影响因子：
8.6
作者：
Abbott, B. P.;Abbott, R.;Zweizig, J.
通讯作者：
Zweizig, J.