本文選題：伽瑪暴 + 宇宙學(xué)演化��； 參考：《廣西大學(xué)》2015年碩士論文

【摘要】：伽瑪暴是發(fā)生于宇宙學(xué)距離、恒星層次和極端高能的伽瑪射線爆發(fā)現(xiàn)象。隨著觀測(cè)上不斷獲得進(jìn)展,特別是Swift衛(wèi)星升天以來積累了大量有紅移測(cè)定的伽瑪暴本身及其余輝樣本,推動(dòng)其理論研究向前進(jìn)展。本工作重點(diǎn)研究為利用Swift觀測(cè)的大樣本伽瑪暴研究伽暴光度宇宙學(xué)演化,同時(shí)基于大樣本的多波段余輝數(shù)據(jù)對(duì)標(biāo)準(zhǔn)模型進(jìn)行檢驗(yàn)和探究其暴周環(huán)境,論文具體組成如下：第一章主要是伽瑪暴及其余輝的綜述,全面介紹伽瑪暴觀測(cè)進(jìn)展和理論突破。第二章重點(diǎn)介紹了利用Swift觀測(cè)的大樣本伽瑪暴研究伽暴光度的宇宙學(xué)演化。目前探測(cè)到的伽瑪暴最高紅移達(dá)到9.4,是研究早期宇宙性質(zhì)的潛在探針。基于最近10年的swift的有紅移測(cè)定的258個(gè)伽瑪暴的大樣本,我們探究伽瑪暴宇宙學(xué)演化性質(zhì)。首先采作用T統(tǒng)計(jì)的方法得出伽瑪暴的確是宇宙學(xué)演化的,其演化方式為L∞(1+Z)0.74±0.09。同時(shí)我們也采用蒙特卡羅模擬的方法,基于伽馬暴率跟隨恒星形成率的假設(shè),得到L∞(1+Z)0.99+0.60-0.45。這兩種相互獨(dú)立的方法得到了相似的結(jié)果。我們的研究結(jié)果與大質(zhì)量恒星初始質(zhì)量函數(shù)的演化相符,在一定程度上支持了伽瑪暴光度的宇宙學(xué)演化緣于大質(zhì)量恒星初始質(zhì)量的宇宙學(xué)演化。第三章主要是利用光學(xué)多波段余輝對(duì)標(biāo)準(zhǔn)模型進(jìn)行檢驗(yàn)和探究其暴周環(huán)境。王遠(yuǎn)矚等人系統(tǒng)性分析X射線余輝發(fā)現(xiàn)有少數(shù)暴的晚期余輝譜有軟化現(xiàn)象,然而相應(yīng)的光變卻沒什么不一樣,這在外激波模型框架下是很難解釋。為了探究光學(xué)余輝中否也有可能存譜演化模式,本工作通過收集光學(xué)多波段觀測(cè)的伽瑪暴余輝,聯(lián)合X射線余輝,進(jìn)行分辨譜分析,從頻域角度檢驗(yàn)外激波模型。同時(shí)我們還嘗試用伽瑪暴光學(xué)余輝譜觀測(cè)對(duì)伽瑪暴寄主星系消光性質(zhì)進(jìn)行研究。
[Abstract]:Gamma-ray bursts occur in cosmological distances, stellar levels, and extremely high energy gamma-ray bursts. With the continuous progress in observation, especially the accumulation of a large number of red-shift gamma storms and their afterglow samples since the Swift satellite was launched into space, the theoretical research has been advanced. This work focuses on studying the cosmic evolution of galactography using large sample gamma-ray bursts observed by Swift. At the same time, based on the multi-band afterglow data of large samples, the standard model is tested and its surrounding environment is explored. The main contents of this paper are as follows: the first chapter is a review of gamma storms and their afterglow. The second chapter focuses on the cosmological evolution of the Galactogamma-ray study using large sample gamma-ray bursts observed by Swift. The highest redshift of the detected gamma-ray storms is 9.4, which is a potential probe for the study of the properties of the early universe. Based on the large sample of 258 gamma-ray bursts measured by swift in the last 10 years, we investigate the cosmological evolution of gamma-ray storms. First of all, the method of T statistics shows that the gamma-ray burst is really cosmological, and its evolution mode is L _ 鈭，

本文編號(hào)：1960162