暗能量宇宙与暗能量天体物理性质的研究
发布时间：2019-03-08 10:59
【摘要】：本文对暗能量宇宙与暗能量天体的物理性质进行了研究。第一章简要介绍了宇宙加速膨胀的观测和暗能量宇宙模型；第二章推导了广义相对论与宇宙学的基本方程；第三章讨论了具有奇异物质与暗能量作用的四维宇宙模型；第四章建立了衰减真空能模型,综合考虑了物质、标量场和衰减真空能的贡献；第五章研究了原初氦丰度的修正经典模型,并计算了氦丰度的观测值对早期宇宙中暗能量和高能光子的约束；第六章研究了暗能量和费米物质耦合的sine-Gordon孤子星模型,分析了星体中心暗能量达到稳定状态所满足的条件；第七章获得了Chern-Simons规范场耦合的(2+1)维引力模型中的黑洞解,计算了电磁场流密度的渐近分布参量。 本论文中具有创新性的工作如下： 1、采用试探解的方法讨论了具有奇异物质与暗能量作用的四维宇宙模型。 2、首次发现了衰减真空能模型中在减速和加速膨胀阶段的精确宇宙解,采用186个Ia型超新星的视星等-红移观测数据,给出了各种宇宙学参量的数值,计算出了这两个阶段的宇宙年龄。此外,在具有扰动的情况下,对该模型中的物理参量进行了分析和讨论。 3、根据氦丰度的观测值给出了早期宇宙中暗能量和高能光子的约束范围。 4、研究了Brans-Dicke标量场和凝聚费米对混合的sine-Gordon孤子星模型。结果表明,当耦合系数满足一定约束条件时,星体中心的暗能量可达到稳定状态。 5、分析了Chern-Simons规范场作用的(2+1)维引力的物理性质,得到了具有暗能量鬼场耦合的一种新的黑洞解,另外,还计算了电磁场的渐近分布指数。
[Abstract]:In this paper, the physical properties of dark energy universe and dark energy objects are studied. The first chapter briefly introduces the observation and dark energy cosmic model of the accelerated expansion of the universe, the second chapter deduces the basic equations of general relativity and cosmology, the third chapter discusses the four-dimensional cosmic model with the action of strange matter and dark energy. In chapter 4, the attenuated vacuum energy model is established, which takes into account the contribution of matter, scalar field and attenuated vacuum energy. In chapter 5, the modified classical model of the original helium abundance is studied, and the constraints of the observed helium abundance on dark energy and high energy photons in the early universe are calculated. In chapter 6, the sine-Gordon solitary star model coupled with dark energy and Fermi matter is studied, and the conditions under which the dark energy in the center of the star reaches the stable state are analyzed. In chapter 7, the black hole solution in the (21) dimensional gravitational model coupled by the Chern-Simons gauge field is obtained, and the asymptotic distribution parameters of the flow density of the electromagnetic field are calculated. The innovative work in this thesis is as follows: 1. The four-dimensional cosmic model with the interaction of singular matter and dark energy is discussed by using the method of exploratory solution. 2. The exact cosmic solutions in the deceleration and accelerated expansion stages of the attenuated vacuum energy model are found for the first time. The magnitude-redshift observation data of 186 Ia supernovae are used, and the values of various cosmological parameters are given. The cosmic ages of these two stages are calculated. In addition, the physical parameters in the model are analyzed and discussed in the case of disturbance. 3. According to the observations of helium abundance, the constrained ranges of dark energy and high energy photons in the early universe are given. 4. The sine-Gordon solitary star model of Brans-Dicke scalar field and condensed Fermi pair mixing is studied. The results show that the dark energy in the center of the star can reach a stable state when the coupling coefficient satisfies a certain constraint condition. 5. The physical properties of (21) dimension gravitation of Chern-Simons gauge field are analyzed, and a new black hole solution with dark energy ghost field coupling is obtained. In addition, the asymptotic distribution index of electromagnetic field is also calculated.
【学位授予单位】：四川师范大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：P159;P145.9
[Abstract]:In this paper, the physical properties of dark energy universe and dark energy objects are studied. The first chapter briefly introduces the observation and dark energy cosmic model of the accelerated expansion of the universe, the second chapter deduces the basic equations of general relativity and cosmology, the third chapter discusses the four-dimensional cosmic model with the action of strange matter and dark energy. In chapter 4, the attenuated vacuum energy model is established, which takes into account the contribution of matter, scalar field and attenuated vacuum energy. In chapter 5, the modified classical model of the original helium abundance is studied, and the constraints of the observed helium abundance on dark energy and high energy photons in the early universe are calculated. In chapter 6, the sine-Gordon solitary star model coupled with dark energy and Fermi matter is studied, and the conditions under which the dark energy in the center of the star reaches the stable state are analyzed. In chapter 7, the black hole solution in the (21) dimensional gravitational model coupled by the Chern-Simons gauge field is obtained, and the asymptotic distribution parameters of the flow density of the electromagnetic field are calculated. The innovative work in this thesis is as follows: 1. The four-dimensional cosmic model with the interaction of singular matter and dark energy is discussed by using the method of exploratory solution. 2. The exact cosmic solutions in the deceleration and accelerated expansion stages of the attenuated vacuum energy model are found for the first time. The magnitude-redshift observation data of 186 Ia supernovae are used, and the values of various cosmological parameters are given. The cosmic ages of these two stages are calculated. In addition, the physical parameters in the model are analyzed and discussed in the case of disturbance. 3. According to the observations of helium abundance, the constrained ranges of dark energy and high energy photons in the early universe are given. 4. The sine-Gordon solitary star model of Brans-Dicke scalar field and condensed Fermi pair mixing is studied. The results show that the dark energy in the center of the star can reach a stable state when the coupling coefficient satisfies a certain constraint condition. 5. The physical properties of (21) dimension gravitation of Chern-Simons gauge field are analyzed, and a new black hole solution with dark energy ghost field coupling is obtained. In addition, the asymptotic distribution index of electromagnetic field is also calculated.
【学位授予单位】：四川师范大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：P159;P145.9
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