本文選題：blazar + CCD測光�。� 參考：《云南師范大學(xué)》2014年碩士論文

【摘要】：活動星系核（Active Galactic Nucleus）是天體物理學(xué)的研究前沿。目前，活動星系核（AGNs）研究對解決許多天體物理學(xué)中的重大問題起到了不可替代的作用。同時(shí)，它也是天體物理學(xué)中最具有研究價(jià)值的內(nèi)容，許多有關(guān)活動星系核的重要問題始終困擾著天文學(xué)家們。在活動星系核中存在著一類很特殊的天體，，我們把它稱為Blazar(耀變體)，由于它們所特有的物理性質(zhì)：大振幅快速光變、高偏振、整個(gè)電磁波段的非熱連續(xù)輻射及致密的射電輻射等,使Blazar名聲大噪，對它的研究也成為了熱門課題，它們所特有的物理性質(zhì)對活動星系核（AGNs）理論模型的建立和探索活動星系核中心區(qū)域物理特性有重要意義。而光變周期的研究對于研究天體的轉(zhuǎn)動、振動和軌道運(yùn)動及探索天體的中心黑洞質(zhì)量和輻射區(qū)域有重要意義。 活動星系核的觀測歷史、主要特征及常見分類都在本文中有所介紹，而活動星系核的輻射機(jī)制和光變特性是問題的關(guān)鍵，因此本文介紹了CCD測光技術(shù)在天體測光方面的應(yīng)用及理論基礎(chǔ)，重點(diǎn)對Blazar的CCD測光進(jìn)行了闡述，在此基礎(chǔ)上提出了利用IRAF軟件對Blazar的光學(xué)波段觀測數(shù)據(jù)自動處理的方法，很好地解決了CCD測光觀測中產(chǎn)生的海量數(shù)據(jù)如何方便快捷地進(jìn)行批量處理的困難。對光變周期的分析計(jì)算方法有很多，本文主要針對BL Lac天體OJ287的光變周期采用了Jurkevich方法進(jìn)行分析和研究。Jurkevich方法的準(zhǔn)確性由正弦函數(shù)周期信號的模擬檢驗(yàn)得以驗(yàn)證。假設(shè)長周期光變來源與吸積盤有關(guān)聯(lián)，根據(jù)薄盤的熱不穩(wěn)定性來分析，從而得到R81.75Rg和R87.85Rg是其不穩(wěn)定性發(fā)生的區(qū)域。通過對OJ287的光變周期研究，獲得了解決天體的轉(zhuǎn)動、振動和軌道運(yùn)動等基本問題的初步方法�？傊�，光變周期的研究是解決天體時(shí)變問題的著手點(diǎn)。
[Abstract]:Active Galactic Nucleus is the frontier of astrophysics. At present, the study of AGNs plays an irreplaceable role in solving many important problems in astrophysics. At the same time, it is also the most valuable research content in astrophysics. There is a very special class of objects in the active galactic nucleus, which we call Blazar, because of their unique physical properties: large amplitude fast light change, high polarization. The non-thermal continuous radiation and dense radio radiation in the whole electromagnetic wave region have made Blazar famous, and its research has become a hot topic. Their unique physical properties are of great significance to the establishment of AGNs theoretical model and the exploration of the physical properties of AGNs in AGNs. The study of the period of light variation is of great significance for the study of the rotation, vibration and orbital motion of celestial bodies and for the exploration of the mass and radiation region of the central black hole of celestial bodies. The observational history, main characteristics and common classification of AGNs are introduced in this paper. The radiative mechanism and light variation characteristics of AGNs are the key to the problem. In this paper, the application and theoretical basis of CCD photometry in astrometry are introduced, and the CCD photometry of Blazar is emphasized. On the basis of this, the method of automatic processing of optical band observation data of Blazar using IRAF software is put forward. The difficulty of mass data processing in CCD photometry is well solved. There are many methods to analyze and calculate the period of light variable. In this paper, the Jurkevich method is used to analyze the period of OJ287 of BL Lac celestial body and the accuracy of the method is verified by the simulation of sine function periodic signal. Assuming that the source of long-period light variation is related to the accretion disk, the thermal instability of the thin disk is analyzed, and it is concluded that R81.75Rg and R87.85Rg are the regions where the instability occurs. Based on the study of OJ287's optical variation period, a preliminary method for solving the basic problems of celestial body rotation, vibration and orbital motion is obtained. In a word, the study of optical variation period is the starting point to solve the time-varying problem of celestial bodies.
【學(xué)位授予單位】：云南師范大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：P157.7

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本文編號：1944883