SDSS类星体谱线的测量及其应用

发布时间：2018-05-02 04:59

本文选题：活动星系核 + 类星体　；参考：《广州大学》2011年硕士论文

【摘要】：活动星系是一类特殊的天体,其中有着剧烈的物理过程,能够在很小体积内辐射出比正常星系更亮的光度,并且伴随有物质的爆发和喷射,其辐射覆盖了射电到γ射线整个电磁波的全波段。本文利用多波段数据(射电、红外、光学、紫外和X-ray),构建了362个SDSS第五期中的平谱射电类星体(FSRQ)的能谱分布,研究这些源的积分光度和热光度之间偏差,并探索其积分光谱和各波段单色光度之间的关系。SDSS的光谱提供了大量天体的信息,是研究天体的重要工具。本文也介绍了对SDSS类星体光谱分析处理的基本过程,包括分析处理幂律连续谱、铁连续谱、发射线和吸收线,也初步介绍了我们在IDL平台下开发的专用于分析处理SDSS类星体光谱的程序。第一章介绍相关研究背景:活动星系核的基本特征和分类,类星体的吸收线和分类,多波段巡天数据(射电、红外、光学、紫外和X-ray)。第二章介绍362个SDSS第五期中的平谱射电类星体(FSRQ)的多波段数据(射电、红外、光学、紫外和X-ray)的交叉认证,并利用这些数据为每一个源构建了能谱分布,进而得出每一个源的积分光度。同时利用热改正因子估算每一个源的热光度,并与其对应的积分光度进行比较,发现它们之间存在比较大的偏差。FSRQ的相对论性的喷流的方向跟视线方向很接近,它们是很极端的活动星系核,有别于射电静类星体,积分光度与热光度之间的偏差很可能来源于相对论性的非热辐射为主的喷流。本章对这种关系做了初步的分析,发现它们之间的偏差的确与相对论性的非热辐射为主的喷流有关。第三章介绍了对SDSS类星体光谱分析处理的基本过程,也初步介绍了我们在IDL平台下开发的专用于分析处理SDSS类星体光谱的程序,同时也给出了使用本程序一些注意事项。第四章做了一个简单的总结和展望。
[Abstract]:Active galaxies are a special class of celestial bodies that have intense physical processes that radiate brighter luminosity than normal galaxies in very small volumes, accompanied by bursts and ejections of matter. Its radiation covers the entire band of radio to 纬-ray electromagnetic waves. Based on the multiband data (radio, infrared, optical, ultraviolet and X-rayge), the spectral distributions of the flat spectrum radio quasars in the fifth phase of SDSS are constructed, and the deviations between the integral luminosity and the thermal luminosity of these sources are studied. The relationship between the integral spectrum and the monochromatic luminosity of each band. The spectrum of SDSS provides a great deal of information of celestial bodies and is an important tool for the study of celestial bodies. This paper also introduces the basic process of spectral analysis of SDSS quasars, including power law continuous spectrum, iron continuous spectrum, emission line and absorption line. A program developed on IDL platform for analyzing and processing the spectra of SDSS quasars is also introduced. Chapter 1 introduces the basic characteristics and classification of active galactic nuclei, the absorption lines and classification of quasars, and the multiband survey data (radio, infrared, optical, ultraviolet and X-rayne). The second chapter introduces the cross authentication of the multiband data (radio, infrared, optical, ultraviolet and X-ray) for the flat spectrum radio quasar FSRQs in the fifth phase of SDSS, and uses these data to construct the energy spectrum distribution for each source. Then the integral luminosity of each source is obtained. At the same time, the thermal correction factor is used to estimate the thermal luminosity of each source, and compared with the corresponding integral luminosity, it is found that the relativistic jet direction of FSRQ is very close to the direction of line of sight. They are very extreme active galactic nuclei, which are different from radio static quasars. The deviation between integral luminosity and thermal luminosity is probably derived from relativistic non-thermal radiation-dominated jets. It is found that the deviation between them is related to the relativistic non-thermal radiation jet. The third chapter introduces the basic process of spectral analysis and processing of SDSS quasars, and also introduces the program specially developed under IDL platform for analyzing and processing the spectrum of SDSS quasars. At the same time, some points for attention in using this program are also given. The fourth chapter makes a simple summary and prospect.
【学位授予单位】：广州大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：P141

【相似文献】