论文标题
暗物质对核和中子恒星物质的影响
Effects of dark matter on the nuclear and neutron star matter
论文作者
论文摘要
我们研究了暗物质参数的暗物质影响，这些参数表征了超密集的富含中子核的状态的方程。核物质的可观察性，即在存在暗物质中的对称性和非对称核物质的情况下的不可压缩性，对称能量及其高阶衍生物，并借助扩展的相对论均值模型进行了分析。计算也扩展到β稳定物质，以探索中子星的性质。我们使用NL3，G3和IOPB-I力分析了对对称核物质，纯中子物质和中子星的暗物质影响。每个粒子的结合能和压力是在有没有考虑与核物质系统的暗物质相互作用的情况下计算的。还分析了暗物质对对称能及其不同系数的影响。由于核物质培养基中存在暗物质，因此不可压缩性和偏度参数受到很大影响。我们将计算扩展到中子恒星，并发现其质量，半径和静态和旋转中子恒星的惯性矩，有或没有暗物质的贡献。旋转中子恒星的质量由于速度快速旋转而在质量分离极限中的频率发生了很大变化。发现暗物质的影响对于某些核物质参数很重要，这对于天体物理对象的性质至关重要。
We study the dark matter effects on the nuclear matter parameters characterising the equation of states of super dense neutron-rich nucleonic-matter. The observables of the nuclear matter, i.e. incompressibility, symmetry energy and its higher-order derivatives in the presence dark matter for symmetric and asymmetric nuclear matter are analysed with the help of an extended relativistic mean-field model. The calculations are also extended to beta-stable matter to explore the properties of the neutron star. We analyse the dark matter effects on symmetric nuclear matter, pure neutron matter and neutron star using NL3, G3 and IOPB-I forces. The binding energy per particle and pressure are calculated with and without considering the dark matter interaction with the nuclear matter systems. The influences of dark matter are also analysed on the symmetry energy and its different coefficients. The incompressibility and the skewness parameters are affected considerably due to the presence of dark matter in the nuclear matter medium. We extend the calculations to the neutron star and find its mass, radius and the moment of inertia for static and rotating neutron star with and without dark matter contribution. The mass of the rotating neutron star is considerably changing due to rapid rotation with the frequency in the mass-shedding limit. The effects of dark matter are found to be important for some of the nuclear matter parameters, which are crucial for the properties of astrophysical objects.
