本文選題：暗物質(zhì) + 暗能量��； 參考：《復(fù)旦大學(xué)》2012年碩士論文

【摘要】：天文觀測表明,我們的宇宙正在加速膨脹,為了對此做出解釋,人們猜測宇宙中存在著一種未知的物質(zhì),稱為“暗能量”。暗能量與暗物質(zhì)一起,占據(jù)現(xiàn)今宇宙中物質(zhì)總量的大部分。理論上,暗能量可能與暗物質(zhì)相互作用。本文討論暗能量和暗物質(zhì)之間的兩種耦合形式。首先,我們將原有的暗能量與暗物質(zhì)問能量交換的模型,推廣到暗能量狀態(tài)方程隨時間改變的情況；其次,類比Thomson散射,我們構(gòu)造了暗物質(zhì)受到暗能量散射的模型。對這兩種模型,我們分別分析了它們的擾動穩(wěn)定性問題,討論這兩種相互作用對宇宙微波背景輻射溫度譜的影響,以及相互作用強(qiáng)度、暗能量狀態(tài)方程和物質(zhì)豐度等宇宙學(xué)參數(shù)間的簡并,最后,我們使用天文觀測數(shù)據(jù)對模型進(jìn)行擬合,以打破參數(shù)間的簡并,給出暗能量暗物質(zhì)間相互作用的約束。
[Abstract]:Astronomical observations indicate that our universe is expanding at an accelerated pace, and to explain this, it is assumed that there is an unknown substance in the universe, called "dark energy". Dark energy, together with dark matter, accounts for most of all matter in the universe today. Theoretically, dark energy may interact with dark matter. Two kinds of coupling forms between dark energy and dark matter are discussed in this paper. First, we extend the original model of energy exchange between dark energy and dark matter to the case of dark energy equation of state changing with time; secondly, we construct a model of dark matter scattering by dark energy by analogy with Thomson scattering. For these two models, we analyze their perturbation stability, discuss the influence of these two interactions on the temperature spectrum of cosmic microwave background radiation and the intensity of the interaction. The degeneracy between the dark energy equation of state and the cosmological parameters such as mass abundance. Finally, we use the astronomical observation data to fit the model in order to break the degeneracy of the parameters and give the constraint of the interaction between dark energy and dark matter.
【學(xué)位授予單位】：復(fù)旦大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2012
【分類號】：P159

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本文編號：2115914