关于暗物质与暗能量统一的研究
发布时间：2019-01-30 07:32
【摘要】：本文根据广义相对论，在回顾现代宇宙学的基础上，重点研究了目前宇宙学中的热点问题-暗物质与暗能量。为了解释这两种未知的物质，试图说明其性质的各种各样的模型纷纷建立，并且试图统一这两种物质的模型也出现了。本文根据基础理论模型并结合实际观测，，试图建立统一暗物质与暗能量的理论模型，具体是由NGC3198的自转曲线出发，将常数状态方程参数的暗能量的能量动量张量引入爱因斯坦引力场方程后，建立球对称度规，结合具体所观测到的NGC3198的不同径向距离的圆周速度的简单拟合自转曲线，经计算得出了暗能量的在NGC3198内的径向密度分布和暗能量的等效质量与半径的关系。虽然该模型可以解释NGC3198的平坦自转曲线，其它星系中需要暗物质来解释的地方也可以用该模型的方法。
[Abstract]:Based on the review of modern cosmology according to general relativity, this paper focuses on the research of dark matter and dark energy, which are the hot issues in cosmology. In order to explain the two unknown substances, a variety of models have been set up to explain their properties, and the models of trying to unify the two substances have also appeared. Based on the basic theoretical model and practical observation, this paper attempts to establish a theoretical model of unified dark matter and dark energy, which is based on the rotation curve of NGC3198. After introducing the energy and momentum of dark energy of constant equation of state into Einstein's gravitational field equation, the spherical symmetry metric is established, and the rotation curve of circular velocity of different radial distance of NGC3198 is simply fitted. The radial density distribution of dark energy in NGC3198 and the relation between the equivalent mass and radius of dark energy are obtained. Although the model can explain NGC3198's flat rotation curve, it can also be used to explain where dark matter is needed in other galaxies.
【学位授予单位】：云南师范大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：P145.9
本文编号：2417901
[Abstract]:Based on the review of modern cosmology according to general relativity, this paper focuses on the research of dark matter and dark energy, which are the hot issues in cosmology. In order to explain the two unknown substances, a variety of models have been set up to explain their properties, and the models of trying to unify the two substances have also appeared. Based on the basic theoretical model and practical observation, this paper attempts to establish a theoretical model of unified dark matter and dark energy, which is based on the rotation curve of NGC3198. After introducing the energy and momentum of dark energy of constant equation of state into Einstein's gravitational field equation, the spherical symmetry metric is established, and the rotation curve of circular velocity of different radial distance of NGC3198 is simply fitted. The radial density distribution of dark energy in NGC3198 and the relation between the equivalent mass and radius of dark energy are obtained. Although the model can explain NGC3198's flat rotation curve, it can also be used to explain where dark matter is needed in other galaxies.
【学位授予单位】：云南师范大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：P145.9
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