标题： 中子星中的相变与更硬的核心流体：对恒星结构、动力学稳定性及潮汐变形的影响 显示英文标题

标题： Phase transition and stiffer core fluid in neutron stars: Effects on stellar configurations, dynamical stability, and tidal deformability

摘要： 在这项工作中，我们研究了中子星核心的相变以及更硬的流体对其静态平衡构型、动力学稳定性以及潮汐变形性的影响。 为此，我们考虑核心和包层中的流体遵循相对论多态方程状态。 我们发现，核心中的相变和更硬的流体会反映在总质量、半径、声速、核半径、界面处慢速和快速转换的径向稳定性以及潮汐变形性上。 我们还研究了双中子星系统的无量纲潮汐变形参数$\Lambda_1$和$\Lambda_2$，其中啁啾质量等于 GW$170817$。 最后，我们将我们的结果与观测数据进行对比，以展示相变和更硬的核心流体在中子星研究中可能发挥的作用。 显示英文摘要

摘要： In this work, we investigate the influence of the phase transition and a stiffer fluid in neutron stars' cores on the static equilibrium configuration, dynamical stability, and tidal deformability. For this aim, it is taken into account that the fluid in the core and the envelope follow the relativistic polytropic equation of state. We find that the phase transition and a stiffer fluid in the core will reflect in the total mass, radius, speed of sound, core radius, radial stability with a slow and rapid conversion at the interface, and tidal deformability. We also investigate the dimensionless tidal deformability $\Lambda_1$ and $\Lambda_2$ for a binary neutron stars system with chirp mass equal to GW$170817$. Finally, we contrast our results with observational data to show the role that phase transition and a stiffer core fluid could play in the study of neutron stars.