Study On High Energy Gamma Ray Radiation Of TeV Variant

In the thesis, we summarize the definition, classification, observational featuresof active galaxies nucleus (AGNs), and introduce the observational properties, energyspectrum characteristics, Doppler effect, relativistic beaming effect, cosmologicalredshift, radiation process effect and the theoretical model of blazer, and then verifythat the change of SSC model parameters cause effect of radiation spectrum. Basedon the homogeneous Synchrotron Self Compton (SSC) model and externalbackground light (EBL) model, we analyze the multi-band data of Fermi-LAT TeVBlazar source Mark421,3C273, PKS2155-304with dual power electronic spectrumdistribution and appropriate model parameters. The calculation results indicate thatthe synchrotron self Compton model can produce the multi-band quasi-simultaneityradiation spectrums of TeV Blazar source Mark421,3C273, PKS2155-304inquiescent state, and thus obtain the TeV Blazar source Jet magnetic field, Dopplerfactor, electron number density, geometrical parameters and physical parameters inquiet state.In addition, we consider the ultra relativistic proton and extragalacticbackground light photon of p collisions to contribute to the high gamma raysenergy spectrum apart from the multi-band radiation spectrum from traditionalsynchrotron self Compton model. This model considers that both the ultra relativisticelectron of inverse Compton scattering in the jets and the ultra relativistic proton andextragalactic background light photon of p collisions in interstellar spacecontribute to the high gamma rays energy spectrum. Assuming a reasonable electronspectra and proton spectra, we apply the above process to study the multi-band energyspectrum of the object PKS2155-304,1ES0347-121which is a TeV emitter. Theresults of calculation indicate that the mechanisms we considering can entirely fitwith the multi-band energy spectrum of the object PKS2155-304,1ES0347-121inquiescent state and in some certain conditions, the secondary radiation to be producedthrough the ultra relativistic proton and extragalactic background light photon of p collisions to obviously contribute to the high gamma rays energy spectrum, especiallythe high-energy radiation hard spectrum. Our results indicate that TeV blazargamma-ray hard spectrum can be explained by secondary radiation generated by theinteraction of cosmic ray protons and the interstellar background light photon.