核心有虫洞的恒星
A Star Harbouring a Wormhole at its Core
摘要：
我们考虑由充满完美流体的虫洞组成的配置。这种模型可以用来描述具有非平凡拓扑结构的恒星和中子星。隧道的存在允许流体的运动，包括系统核心附近的振荡。选择理想流体的多方状态方程，得到了静态正则解。基于这些解决方案，我们认为小的径向振荡的配置，并表明解决方案是稳定的外部区域的线性扰动。
英文摘要：
We consider a configuration consisting of a wormhole filled by a perfect fluid. Such a model can be applied to describe stars as well as neutron stars with a nontrivial topology. The presence of a tunnel allows for motion of the fluid, including oscillations near the core of the system. Choosing the polytropic equation of state for the perfect fluid, we obtain static regular solutions. Based on these solutions, we consider small radial oscillations of the configuration and show that the solutions are stable with respect to linear perturbations in the external region.
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