论文标题
动态暗能量对中子恒星平衡的影响
Impact of dynamical dark energy on the neutron star equilibrium
论文作者
论文摘要
我们研究了中子恒星内的微型耦合标量黑能的密度分布。在流体力学表示中，将暗能量视为具有三个参数（背景密度，状态方程和有效音速）的完美流体。中子恒星物质是由布鲁塞尔 - 蒙特利尔组开发的三个统一状态方程进行建模的。随着中子恒星内的暗能量的计算密度分布（及其对暗能量参数的依赖性），我们研究了它的存在如何影响宏观特征和中子恒星的质量极限值。从这种影响中，我们借助于观察到的中子星的最大质量来得出可能限制暗能声的有效速度。在这种方法中，我们发现，在平方速度的光速中，有效的声音速度不能小于$ \ sim 10^{ - 2} $。
We study the density distribution of the minimally-coupled scalar field dark energy inside a neutron star. The dark energy is considered in the hydrodynamical representation as a perfect fluid with three parameters (background density, equation of state, and effective sound speed). The neutron star matter is modeled with three unified equations of state, developed by the Brussels-Montreal group. With the calculated density distribution of the dark energy inside a neutron star (and its dependence on the dark energy parameters) we investigate how its presence impacts the macroscopic characteristics and the value of the mass limit for neutron stars. From this impact we derive the possible constrains on the effective speed of sound of dark energy with the help of maximal known masses of observed neutron stars. In this approach, we have found, that the squared effective speed of sound can not be smaller than $\sim 10^{-2}$ in units of squared speed of light.
