论文标题
具有现实状态方程的中子星的稳定性和重力崩溃
Stability and gravitational collapse of neutron stars with realistic equations of state
论文作者
论文摘要
我们讨论了稳定性和构造动力构型，描述了具有与最近的Ligo-Virgo约束相兼容的状态方程的不稳定中子星的重力塌陷。与其他考虑恒星配置崩溃而没有先验知识的崩溃的作品，如果它是稳定或不稳定的，我们首先对此类状态方程式进行完整的分析。基本模式的平方频率的负值表明我们的径向不稳定性相对于不稳定的恒星倒塌到黑洞。我们发现，对于某些相关的物理量，例如质量，发光度，能量密度，压力，热流，温度和数量，描述了散装粘性过程的数值解决方案，以对应于塌陷期间的时间和径向行为。我们的结果表明，由于耗散效应，状态方程发生的突然变化接近事件范围的形成。在崩溃过程中，所有能量条件都受到尊重，这意味着我们的模型在物理上是可以接受的。
We discuss the stability and construct dynamical configurations describing the gravitational collapse of unstable neutron stars with realistic equations of state compatible with the recent LIGO-Virgo constraints. Unlike other works that consider the collapse of a stellar configuration without a priori knowledge if it is stable or unstable, we first perform a complete analysis on stellar stability for such equations of state. Negative values of the squared frequency of the fundamental mode indicate us radial instability with respect to the collapse of the unstable star to a black hole. We find numerical solutions corresponding to the temporal and radial behavior during the evolution of the collapse for certain relevant physical quantities such as mass, luminosity, energy density, pressure, heat flow, temperature and quantities that describe bulk viscous processes. Our results show that the equation of state undergoes abrupt changes close to the moment of event horizon formation as a consequence of dissipative effects. During the collapse process all energy conditions are respected, which implies that our model is physically acceptable.
