arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2002.00594nucl-thastro-ph.HEhep-ph
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暗物质对核物质和中子星物质的影响

Effects of dark matter on the nuclear and neutron star matter

H. C. Das, Ankit Kumar, Bharat Kumar, S. K. Biswal, Takashi Nakatsukasa, Ang Li, S. K. Patra

摘要:

研究了暗物质对表征超密丰中子核子物质状态方程的核物质参数的影响。本文利用扩展的相对论平均场模型,分析了对称和非对称核物质在有暗物质存在时的不可压缩性、对称能及其高阶导数等核物质的可观测量。计算还扩展到β稳定物质,探索中子星的属性。利用NL 3、G3和IOPB-I力分析了暗物质对对称核物质、纯中子物质和中子星的影响。在考虑和不考虑暗物质与核物质相互作用的情况下,计算了每个粒子的结合能和压强。分析了暗物质对对称能及其各系数的影响。由于核物质介质中暗物质的存在,对不可压缩性和偏度参数有很大的影响。将计算结果推广到中子星,得到了有无暗物质贡献的静态和旋转中子星的质量、半径和转动惯量。旋转的中子星的质量由于以质量脱落极限的频率快速旋转而发生显著变化。暗物质的影响被发现是重要的一些核物质参数,这是至关重要的天体物理对象的属性。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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