相互作用年刻暗能量模型的研究

发布时间：2018-04-05 08:13

  本文选题：宇宙加速膨胀　切入点：全息暗能量　出处：《东北大学》2013年硕士论文

【摘要】：自1998年通过对超新星的观测发现了宇宙加速膨胀以来,暗能量问题就成为了物理学,天文学以及宇宙学中最重要的问题之一。对暗能量的物理本质的研究与对上世纪60年代发现的暗物质的物理本质的研究并称“双暗”问题。随着科技的发展,观测精度的提升,以及观测数据的累积,人类已经进入了精确宇宙学时代。越来越多暗能量的模型和猜想被提出,暗能量的性质的研究也获得了越来越广泛的关注。在本文在引言中将介绍宇宙学发展的历史,特别是在暗能量发现之后的,当今宇宙学的研究现状。在第二章中,本文将介绍宇宙学的基础以及常见的暗能量模型,包括宇宙学常数模型,相互作用暗能量模型和年刻暗能量模型。在第三章中将主要介绍暗能量的观测数据(包括超新星数据、重子声学振荡数据、宇宙微波背景辐射数据以及哈勃常数观测数据),以及这些观测数据的使用方法。第四章将介绍几种全息暗能量模型,重点研究三种含有相互作用年刻暗能量模型,并使用第三章提到的观测数据来进行参数限制,同时进行比较。结果说明,虽然加入相互作用会增添一个自由参数,但是会大幅改善了原年刻暗能量模型。本文的另外一个目标是比较宇宙微波背景辐射的两种数据,WMAP9和Planck,对模型的影响。结果说明,最新的Planck数据更支持含有相互作用的年刻暗能量模型。同时,本文也和近期相关的重要工作进行了对比。进一步说明本文在数据上,方法上以及模型构建上都有独特的优势。
[Abstract]:Since the discovery of the accelerating expansion of the universe through the observation of supernovae in 1998, the dark energy problem has become one of the most important problems in physics, astronomy and cosmology.The study on the physical nature of dark energy and the physics essence of dark matter discovered in 1960s is called "double dark" problem.With the development of science and technology, the improvement of observation precision and the accumulation of observation data, mankind has entered the age of accurate cosmology.More and more models and conjectures of dark energy have been proposed, and more and more attention has been paid to the properties of dark energy.The history of cosmology development, especially after the discovery of dark energy, is introduced in this paper.In the second chapter, we will introduce the basis of cosmology and the common dark energy models, including the cosmological constant model, the interaction dark energy model and the annual dark energy model.In the third chapter, we will introduce the observation data of dark energy (including supernova data, baryon acoustic oscillation data, cosmic microwave background radiation data and Hubble constant data), as well as the use of these data.In chapter 4, several holographic dark energy models are introduced, and three kinds of models with interacting annual dark energy are studied, and the parameters are restricted by the observed data mentioned in chapter 3, and compared at the same time.The results show that although a free parameter is added to the interaction, the dark energy model of the original year can be greatly improved.Another objective of this paper is to compare the effects of two kinds of data of cosmic microwave background radiation, WMAP9 and Planck, on the model.The results show that the latest Planck data support the annual dark energy model with interaction.At the same time, this paper also compared with recent important work.Further, this paper has a unique advantage in data, method and model building.
【学位授予单位】：东北大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：P159
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本文编号：1713915