【摘要】：活動(dòng)星系核(AGN)是中心區(qū)域有大能量輻射的一類特殊的星系�；顒�(dòng)星系核的一些重要性質(zhì)包括：它們具有恒星狀的外表，隨時(shí)間變化的連續(xù)光譜，，以及寬的發(fā)射線。光變是活動(dòng)星系核的非常普遍現(xiàn)象，從射電到Х射線的所有波段都能觀測(cè)到活動(dòng)星系核的光變。光變的一些參量和特征如光變時(shí)標(biāo)、時(shí)間延遲等，能夠?yàn)槿藗兞私馓祗w的中心結(jié)構(gòu)及物理過程提供一些關(guān)鍵的信息。本文主要對(duì)活動(dòng)星系核光變周期進(jìn)行了研究。 第一章，簡(jiǎn)單介紹了活動(dòng)星系核的基本概念、觀測(cè)特征、分類及其模型。第二章，簡(jiǎn)單地介紹了活動(dòng)星系核光變及其模型。光變是活動(dòng)星系核非常普遍的特征，觀測(cè)和研究活動(dòng)星系核周期性光變是獲得天體各種特性的一個(gè)非常重要的方法。第三章，介紹了幾種常用的活動(dòng)星系核光變周期的研究方法，包括功率譜方法、小波分析方法、離散相關(guān)函數(shù)方法以及Jurkevich方法。這幾種周期分析方法對(duì)研究活動(dòng)星系核光變周期的研究有著很好的應(yīng)用。第四章，介紹了譜分析中最基本也是最常用的方法—傅里葉變換；介紹了譜分析軟件Period04相關(guān)的傅里葉變換以及運(yùn)用譜分析軟件Period04進(jìn)行周期分析的步驟。由于天氣、儀器等一些客觀原因，我們所得到的活動(dòng)星系核光變的觀測(cè)數(shù)據(jù)一定是非均勻的，故Period04采用的是非均勻采樣信號(hào)的傅里葉變換。第五章，介紹了譜分析軟件Period04在活動(dòng)星系核光變周期研究中的應(yīng)用。收集了PKS1510-089天體在射電波段37GHz的光變數(shù)據(jù)、OJ287在光學(xué)B波段和V波段30多年的觀測(cè)數(shù)據(jù)以及S50716+714天體光學(xué)B、V、R和I波段的觀測(cè)數(shù)據(jù)，運(yùn)用譜分析軟件Period04分析了PKS1510-089、OJ287以及S50716+714的光變周期，獲得了較為可信的結(jié)果，成功地將Period04這一新的分析工具應(yīng)用到了活動(dòng)星系核光變周期的研究中。
[Abstract]:Active Galactic Nucleus (AGN) is a special class of galaxies with large energy radiation in the central region. Some important properties of AGNs include their stellar appearance, time-varying continuum, and wide emission lines. Light change is a very common phenomenon in active galactic nuclei (AGNs), which can be observed in all wavelengths from radio to radiation. Some parameters and characteristics of optical variability, such as time scale, time delay and so on, can provide some key information for people to understand the central structure and physical process of celestial bodies. In this paper, the period of light variation in active galactic nuclei is studied. In chapter 1, the basic concepts, observational features, classification and models of AGNs are briefly introduced. In chapter 2, we briefly introduce the light change of active galaxy nuclei and its model. Light change is a very common feature of active galactic nuclei (AGNs). It is an important method to observe and study the periodic light changes of AGNs. In chapter 3, several methods of studying the optical period of AGNs are introduced, including power spectrum method, wavelet analysis method, discrete correlation function method and Jurkevich method. These methods have a good application in the study of the light variation period of active galaxy nuclei. In chapter 4, Fourier transform, which is the most basic and commonly used method in spectrum analysis, is introduced, the Fourier transform related to spectrum analysis software Period04 and the steps of periodic analysis using spectrum analysis software Period04 are introduced. Due to some objective reasons, such as weather and instruments, the observational data of the light change of the active galaxy nucleus must be non-uniform, so the Period04 uses the Fourier transform of the non-uniform sampling signal. In chapter 5, the application of spectrum analysis software Period04 in the study of optical variation period of AGNs is introduced. The optical variation data of PKS1510-089 celestial bodies in radio band 37GHz have been collected for more than 30 years in optical band B and V, as well as in the optical band S50716,714. The optical variation periods of PKS1510-089 OJ287 and S50716,714 have been analyzed by using the Period04 software. A more reliable result is obtained and a new analytical tool, Period04, is successfully applied to the study of the period of light variation in active galaxy nuclei.
【學(xué)位授予單位】：云南師范大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：P157.6

【參考文獻(xiàn)】

相關(guān)期刊論文 前3條

1 謝光中,李開華,鮑夢(mèng)賢,郝鵬九,鄧立吾,周原,吳秀芳;6個(gè)BL Lacertae天體的短時(shí)標(biāo)光變[J];科學(xué)通報(bào);1985年24期

2 白金明,謝光中;BL Lac天體處于高態(tài)與低態(tài)時(shí)的短時(shí)標(biāo)光變的差異及機(jī)制研究[J];天體物理學(xué)報(bào);1999年03期

3 徐云冰;張皓晶;王立恒;;BL Lac天體OJ 287的光學(xué)光變周期研究[J];云南師范大學(xué)學(xué)報(bào)(自然科學(xué)版);2010年04期

本文編號(hào)：2148328