星系與黑洞背景下軸子暗物質(zhì)分布的研究
發(fā)布時間：2019-06-15 00:39
【摘要】：摘要：天文觀測表明宇宙中存在暗物質(zhì),并且暗物質(zhì)是宇宙的主要組成部分,它們對宇宙的結(jié)構(gòu)形成具有重要的作用,暗物質(zhì)是天體物理學(xué)和粒子物理學(xué)中的重要研究課題。目前,暗物質(zhì)的具體構(gòu)成還不十分清楚,因此人們對暗物質(zhì)做了許多理論上的預(yù)測。軸子是暗物質(zhì)的候選者之一,它可能是一種質(zhì)量很小的玻色子,并且在早期宇宙中的QCD相變中產(chǎn)生。 本文以軸子作為研究對象。首先,研究了在軸子暗物質(zhì)的影響下,星系中圍繞其中心的天體旋轉(zhuǎn)速度與其到星系中心的距離的關(guān)系,并且作出了速度與距離的關(guān)系圖,同時以Rubin的實際觀測結(jié)果作為對比。在第四章中分別考慮了四種情況；化學(xué)勢為零的時候,取角量子數(shù)l=0和l=1的情況；化學(xué)勢不為零的時候,也考慮了角量子數(shù)l=0和l=1的情況。結(jié)果表明化學(xué)勢為零的理論計算與實際觀測的結(jié)果定性符合,而化學(xué)勢不為零時,只有l(wèi)=1的理論計算與實際觀測結(jié)果定性符合。另外,本文對這些結(jié)果的物理意義進(jìn)行了分析和討論。 本文還研究了幾種黑洞背景下軸子暗物質(zhì)的分布規(guī)律。分別計算了2維帶電點物質(zhì)黑洞和4維帶電黑洞中軸子的密度分布,還計算了4維弦黑洞中軸子的密度分布,并將計算結(jié)果進(jìn)行了討論和分析。另外,本文還計算了de Sitter和反de Sitter時空中的軸子密度分布和關(guān)聯(lián)函數(shù),討論了化學(xué)勢和宇宙常數(shù)對關(guān)聯(lián)效應(yīng)的影響。 本文具有創(chuàng)新性的工作如下： 1、分析了具有化學(xué)勢的軸子暗物質(zhì)對星系旋轉(zhuǎn)曲線的影響。 2、本文首次推導(dǎo)了彎曲時空下的Popov凝聚方程,分別計算了2維點物質(zhì)黑洞、4維帶電黑洞以及4維dilaton黑洞背景下軸子的密度分布,對這些密度分布的規(guī)律進(jìn)行了討論和分析。 3、本文首次計算了3維和4維de Sitter和反de Sitter時空中的軸子密度分布,并且計算了漸近情況下的軸子關(guān)聯(lián)函數(shù)。
[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，
本文編號：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，
本文編號：2499833
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