Studying On X-ray And TeV Gamma Ray Radiation In BL Lac Objects

The paper begins with a description of the basic situation of active galactic nuclei;then,the basic characteristics of the BL Lac object and the radiation machine are introduced in detail;and then,the correlations of multi-wavelength emissions from fermi blazars is studied,that is,the correlation between the radio,X-ray and gamma-ray radiation fluxes in 818 Fermi blazars samples is statistically analyzed.Our results show that:(1)there is a significantly correlation between Fγ and FR in the HSP and the ISP,but a weak correlation exist in LSP;(2)a weak correlation in found between Fγ and Fx in the HSP,the ISP and the LSP;(3)for the HSP,there is a weak correlation between FR and Fx;in the ISP,there is no correlation between them;but a significantly correlation between FR and Fx exist in LSP.These are in agreement with the Dondi’s and Fan’s results that is deduced from the Energetic Gamma Ray Experiment Telescope(EGRET)data.Our results suggest that the Fermi y-ray derives from the synchrotron self-Compton(SSC)process.We employ the Mrk 421 from the BL Lac object to discuss the correlation between the X-ray and the γ-ray radiation change,and give a simple power-law function Fγ-ray ∝ FX-rayc/s to describe the relationship between them.Our results show that:(1)the radiation mechanism of X-rays and gamma rays can be explained by synchrotron self-Compton(SSC)model for HBL objects.In the word,X-rays are derived from synchrotron radiation,but the inverse Compton scattering originate from the interaction between the soft photons from the synchrotron radiation and the high energetic electrons,and the gamma rays are produced from the process.(2)the energy band of the X ray maybe affect the size of the index c/s,that is,the different energy band range of X ray make the index c/s different.