星系与黑洞背景下轴子暗物质分布的研究
发布时间：2019-06-15 00:39
【摘要】：摘要：天文观测表明宇宙中存在暗物质,并且暗物质是宇宙的主要组成部分,它们对宇宙的结构形成具有重要的作用,暗物质是天体物理学和粒子物理学中的重要研究课题。目前,暗物质的具体构成还不十分清楚,因此人们对暗物质做了许多理论上的预测。轴子是暗物质的候选者之一,它可能是一种质量很小的玻色子,并且在早期宇宙中的QCD相变中产生。 本文以轴子作为研究对象。首先,研究了在轴子暗物质的影响下,星系中围绕其中心的天体旋转速度与其到星系中心的距离的关系,并且作出了速度与距离的关系图,同时以Rubin的实际观测结果作为对比。在第四章中分别考虑了四种情况；化学势为零的时候,取角量子数l=0和l=1的情况；化学势不为零的时候,也考虑了角量子数l=0和l=1的情况。结果表明化学势为零的理论计算与实际观测的结果定性符合,而化学势不为零时,只有l=1的理论计算与实际观测结果定性符合。另外,本文对这些结果的物理意义进行了分析和讨论。 本文还研究了几种黑洞背景下轴子暗物质的分布规律。分别计算了2维带电点物质黑洞和4维带电黑洞中轴子的密度分布,还计算了4维弦黑洞中轴子的密度分布,并将计算结果进行了讨论和分析。另外,本文还计算了de Sitter和反de Sitter时空中的轴子密度分布和关联函数,讨论了化学势和宇宙常数对关联效应的影响。 本文具有创新性的工作如下： 1、分析了具有化学势的轴子暗物质对星系旋转曲线的影响。 2、本文首次推导了弯曲时空下的Popov凝聚方程,分别计算了2维点物质黑洞、4维带电黑洞以及4维dilaton黑洞背景下轴子的密度分布,对这些密度分布的规律进行了讨论和分析。 3、本文首次计算了3维和4维de Sitter和反de Sitter时空中的轴子密度分布,并且计算了渐近情况下的轴子关联函数。
[Abstract]:Abstract: astronomical observations show that dark matter exists in the universe, and dark matter is the main part of the universe, which plays an important role in the formation of the structure of the universe. Dark matter is an important research topic in astrophysics and particle physics. At present, the specific composition of dark matter is not very clear, so people have made a lot of theoretical predictions of dark matter. Axon is one of the candidates for dark matter. It may be a small mass boson and produced in the QCD phase transition in the early universe. In this paper, the axon is taken as the research object. Firstly, the relationship between the rotation velocity of celestial bodies around its center and the distance from the center of the galaxy to the center of the galaxy is studied under the influence of axon dark matter, and the relationship between velocity and distance is drawn. At the same time, the actual observation results of Rubin are compared. In chapter 4, four cases are considered respectively: when the chemical potential is zero, the angular quantum numbers l 鈮，
本文编号：2499833
[Abstract]:Abstract: astronomical observations show that dark matter exists in the universe, and dark matter is the main part of the universe, which plays an important role in the formation of the structure of the universe. Dark matter is an important research topic in astrophysics and particle physics. At present, the specific composition of dark matter is not very clear, so people have made a lot of theoretical predictions of dark matter. Axon is one of the candidates for dark matter. It may be a small mass boson and produced in the QCD phase transition in the early universe. In this paper, the axon is taken as the research object. Firstly, the relationship between the rotation velocity of celestial bodies around its center and the distance from the center of the galaxy to the center of the galaxy is studied under the influence of axon dark matter, and the relationship between velocity and distance is drawn. At the same time, the actual observation results of Rubin are compared. In chapter 4, four cases are considered respectively: when the chemical potential is zero, the angular quantum numbers l 鈮，
本文编号：2499833
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