次级辐射对TeV耀变体高能辐射能谱贡献研究

发布时间：2018-01-13 11:10

本文关键词：次级辐射对TeV耀变体高能辐射能谱贡献研究　出处：《云南师范大学》2014年硕士论文　论文类型：学位论文

【摘要】：本论文概括了活动星系核的定义、特征、分类和活动星系核的统一模型，并介绍了耀变体的观测特征，能谱特点，，相对论聚束效应、多普勒效应以及耀变体的辐射过程和物理模型。基于单区域均匀的同步自康普顿(SynchrotronSelf-Compton,简写为SSC)模型，我们用双幂率电子谱和合适的模型参数分别对具有高能辐射的TeV耀变体Mrk501、PKS2005-489和1ES0229+200的多波段观测结果进行拟合，并考虑到星际背景光光子对高能辐射能谱的吸收。我们的计算结果表明SSC模型能产生TeV耀变Mrk501、PKS2005-489和1ES0229+200宁静态下多波段的辐射能谱，并分别得出TeV耀变体Mrk501、PKS2005-489和1ES0229+200的磁场强度、聚束因子、辐射区域半径等几何参数和物理参数。另外，除了考虑传统的同步自康普顿模型外，还考虑到TeV耀变体的高能伽玛射线光子与河外星系背景光光子的相互作用(VHE EBL e e)产生的次级伽玛射线辐射对高能伽玛射线辐射能谱有重要的贡献。该模型表明喷流内的极端性的相对论性电子的逆康普顿散射和TeV耀变体的高能伽玛射线光子与星际背景光光子的相互作用有助于对高能伽玛射线辐射能谱的研究。假定一个合适的电子谱和星际磁场强度，我们获得较好的TeV耀变体1ES0229+200的能谱。数值计算结果表明，上述物理过程能得到1ES0229+200的多波段辐射能谱，在一定的条件下，正负电子(e)对可能产生新的伽玛射线辐射通过这些e对的逆康普顿散射过程散射微波背景光光子而达到GeV能段。我们的研究结果表明：观测到的TeV耀变体高能辐射硬谱可以用次级伽玛光子对TeV耀变体的高能伽玛射线辐射能谱有贡献来解释。
[Abstract]:In this paper, the definition, characteristics, classification and unified model of AGNs are summarized, and the observational characteristics, energy spectrum characteristics and relativistic bunching effect of AGNs are introduced. Doppler effect, radiative process and physical model of the radiant body. Based on the single region homogeneous Synchrotron Self-Compton model, the SSC-model is used in this paper. We use the double power electron spectrum and the appropriate model parameters to study the TeV variation Mrk501 with high energy radiation, respectively. The multi-band observations of PKS2005-489 and 1ES0229,200 are fitted. Taking into account the absorption of interstellar background photons to high energy radiation spectra, our results show that the SSC model can produce TeV Mrk501. The multiband radiation spectra of PKS2005-489 and 1ES0229200 are obtained, and the Mrk501 of TeV is obtained. The geometrical and physical parameters of PKS2005-489 and 1ES0229,200 are magnetic field intensity, bunching factor, radiative radius and so on. In addition, in addition to the consideration of the traditional synchronous self-Compton model. The interaction of high-energy gamma-ray photons of the TeV yaw with the background photons of the extragalactic system is also considered. The generated secondary gamma ray radiation has an important contribution to the energy spectrum of high energy gamma ray radiation. The model shows the inverse Compton scattering of relativistic electrons in the jet and the high energy gamma ray light of the TeV variation. The interaction of electrons with interstellar background photons is helpful to the study of high energy gamma-ray radiation spectra, assuming an appropriate electron spectrum and interstellar magnetic field intensity. We have obtained a good energy spectrum of 1ES0229200, a variant of TeV, and the numerical results show that the multiband radiation spectrum of 1ES0229200 can be obtained by the above physical process. Under certain conditions. Positron and negative electrons. New gamma-ray radiation may be generated through the inverse Compton scattering process of these e pairs and the microwave background photons are scattered to the GeV energy region. Our results show that:. The observed high energy radiative hard spectrum of the TeV variation can be explained by the contribution of the secondary gamma photon to the high energy gamma-ray radiation spectrum of the TeV variation.
【学位授予单位】：云南师范大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：P157.6

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