本文選題：超新星遺跡 + Chandra�。� 參考：《湘潭大學》2013年碩士論文

【摘要】：超新星（supernova，縮寫為SN）作為宇宙中最劇烈的天體物理現(xiàn)象之一，，一直是以來都是人們研究的熱點。在早期的研究階段，超新星遺跡的X射線圖像觀測分辨率很低，使得我們對超新星遺跡的研究存在一些阻礙。自從能量分辨率和空間分辨率都較高的Chandra X射線觀測衛(wèi)星發(fā)射升空以后，超新星遺跡的X射線輻射為我們理解恒星的晚期演化，宇宙重元素合成和星際介質(zhì)以及宇宙線起源提供了很好的觀測數(shù)據(jù)。本文主要利用高空間分辨率、高能量分辨率、和高靈敏度的Chandra X射線衛(wèi)星觀測數(shù)據(jù)，研究超新星遺跡的高溫熱氣體輻射性質(zhì)。 本論文的第一部分工作利用Chandra衛(wèi)星觀測數(shù)據(jù)，對G292.0+1.8超新星遺跡進行高空間分辨的能譜分析。通過分區(qū)域產(chǎn)生能譜并擬合得到遺跡中各物理參量，如溫度、元素豐度、電離年齡、輻射量等等。我們發(fā)現(xiàn)O、Ne和Mg元素豐度之間都存在很好的相關(guān)性，表明它們都來自同一核合成過程。Si和S元素豐度之間也有較好的相關(guān)性。Fe元素與其它元素都不存在很好的相關(guān)性。通過觀測得到的元素豐度比與理論計算進行比較，得到G292.0+1.8的前身星質(zhì)量為25-30M⊙。 第二部分工作是利用Chandra衛(wèi)星觀測數(shù)據(jù)，對超新星遺跡Tycho進行高空間分辨的能譜分析。我們按第一個工作的計算方式得到了遺跡中各物理參量，例如溫度、元素豐度、電離年齡、輻射量等空間分布。我們發(fā)現(xiàn)Si和S元素豐度之間也有很好的相關(guān)性，表示它們都來自同一核合成過程。Fe和Si元素豐度之間也有一定的正相關(guān)。
[Abstract]:Supernova (SNN), as one of the most intense astrophysical phenomena in the universe, has always been a hot research topic.In the early stage of research, the resolution of X-ray images of supernova remains is very low, which makes the study of supernova remains difficult.Since the launch of the Chandra X-ray observation satellite with high energy and spatial resolution, the X-ray radiation from the supernova remains has given us an understanding of the late evolution of stars.Cosmic heavy element synthesis and interstellar media as well as cosmic ray origin provide good observational data.In this paper, the high temperature thermal gas radiation properties of supernova relic are studied by using Chandra X-ray satellite data with high spatial resolution, high energy resolution and high sensitivity.In the first part of this paper, the high spatial resolution energy spectrum analysis of G292.0 1.8 supernova remains is carried out using the Chandra satellite observation data.The energy spectra are generated from different regions and the physical parameters such as temperature, element abundance, ionization age, radiation amount and so on are obtained.It is found that there is a good correlation between the abundance of ONe and mg, which indicates that they all come from the same nuclear synthesis process. There is also a good correlation between the abundance of 0.Si and the element of S. There is no good correlation between Fe and other elements.By comparing the observed element abundance ratio with the theoretical calculation, it is obtained that the precursor mass of G292.0 1.8 is 25-30M _ (298).In the second part, the high spatial resolution energy spectrum of supernova remnant Tycho is analyzed by using Chandra satellite observation data.The spatial distribution of physical parameters, such as temperature, element abundance, ionization age, radiation and so on, has been obtained according to the calculation method of the first work.We also find that there is also a good correlation between the abundance of Si and S, indicating that they all come from the same nuclear synthesis process. There is also a positive correlation between the abundance of Si and Fe.
【學位授予單位】：湘潭大學
【學位級別】：碩士
【學位授予年份】：2013
【分類號】：P145.3

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相關(guān)期刊論文 前2條

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本文編號：1738144