Study On The Contribution Of Secondary Radiation To High Energy Radiation Energy Spectra Of TeV Variants

In the thesis, we summarize the definition，characteristics，classification and asingle area uniform model of active galactic nuclei, introduce the observationalcharacteristics, energy spectra characteristics, relativistic beaming effect and Dopplereffect, the radiation mechanisms and physical models of blazar. Based on thehomogeneous Synchron Self-Compton (SSC) model, we analyze themulit-wavelength data of TeV Blazar source: Mrk501, PKS2005-489and1ES0229+200with a dual power electronic spectra distribution and appropriate modellingparameters, respectively, and consider absorption effect of the extragalacticbackground light photons for high-energy radiation spectrum. Our calculated resultsindicate that the SSC model can produce the mulit-wavelength radiation spectra ofTeV blazar Mrk501, PKS2005-489and1ES0229+200, and obtain magnetic fieldstrength, Doppler factor, the radius of radiation area，geometrical parameters andphysical parameters in the quiescent state.In addition, we consider high-energy-ray photons from TeV blazars interactionwith the extragalactic background light photons(VHE EBL e e), producingsecondary-rays emission, and secondary-rays emission makes a significatecontribution to the observed high energy-rays emission of TeV blazars apart fromthe multi-wavelength radiation spectra from traditional synchrotron Self-Comptonmodel. This model considers that both inverse Compton scattering of the extremerelativistic electrons in the jet and interaction the high-energy-ray photons fromTeV blazars and the extragalactic background light photons producessecondary-rays emission contribute to the high energy-rays emission. Assuming asuitable eletron spectra and intergalactic magnetic fields(IGMF), we obtain excellentfits to observed spectra of TeV blazar1ES0229+200. The results calculated indicatethat the multi-wavelength radiation spectra of1ES0229+200can be produced, andunder certain conditions, thee pairs may produce a fresh-rays emission throughinverse Compton scattering of thesee pairs against cosmic microwave backgroundphotons to GeV energy band. Our results indicate that the observed high-energy emission "hard" spectra in TeV blazars can be explained by secondary γ-rays produced through inverse Compton scattering of e±pairs against cosmic microwave bavkground photons contribution to high-energy γ-ray emission.