天文观测对暗物质模型的限制

发布时间：2018-03-26 09:13

本文选题：宇宙加速膨胀　切入点：暗物质模型　出处：《大连理工大学》2014年硕士论文

【摘要】：由于我们人类只能看见可见光,可能会片面的认为发光的恒星和星系就是宇宙的全部组成成分。但事实上却不是这样的,宇宙中还存在着大量我们无法看到的物质,这便是我们所谓的暗能量和暗物质。暗能量和暗物质在宇宙至今还是非常神秘的,对此在理论上,宇宙学家们提出了不同的暗物质、暗能量模型,同时还通过使用天文观测数据来揭示其本质。本文基于当前天文观测数据对宇宙暗物质模型进行限制。我们将本论文分为四章来进行描述。首先在第一章中,介绍了研究背景并概述了研究内容及章节安排；接着第二章是宇宙学基础知识,分为背景宇宙学和宇宙中的暗物质模型两部分进行介绍；之后的第三章为本论文中所使用的天文观测限制理论模型的方法,包括了宇宙微波背景辐射、重子声波振荡、Ia型超新星和WiggleZ；第四章中我们给出了有着任意态方程的暗物质的主要的背景演化和扰动方程,同时使用了马可夫链—蒙特卡罗的方法对宇宙学参数的限制进行了全局确定,另外还使用目前高质量的宇宙观测数据点并加入了WiggleZ功率谱的测量来研究对暗物质态方程的束缚。最后,我们给出了本论文的总结和展望。
[Abstract]:Since we humans can only see visible light, we may unilaterally think that luminous stars and galaxies are all the components of the universe. But this is not the case. There are still a lot of things we can't see in the universe. This is what we call dark energy and dark matter. Dark energy and dark matter are still very mysterious in the universe today, and in theory, cosmologists have come up with different models of dark matter, dark energy. It also reveals its nature by using astronomical observational data. Based on the current astronomical observation data, this paper limits the dark matter model of the universe. We divide this paper into four chapters to describe. Firstly, in the first chapter, the research background is introduced, and the research content and chapter arrangement are summarized. The second chapter is the basic knowledge of cosmology, which is divided into two parts: background cosmology and dark matter model in the universe. It includes cosmic microwave background radiation, baryon acoustic oscillation type Ia supernova and Wiggle Z. in chapter 4, we give the main background evolution and perturbation equations of dark matter with arbitrary equation of state. At the same time, the limit of cosmological parameters is determined globally by using Markov chain-Monte Carlo method. In addition, the current high quality cosmic observation data points and the measurement of WiggleZ power spectrum are used to study the binding of dark matter equation of state. Finally, we give a summary and prospect of this paper.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：P145.9

【共引文献】