Study On The Parameters Of Bl Lac Objects Multi-Wavelength Radiation Model

The most active nucleus of the active galaxy is the Blazar.The jet produced by Blazar points directly at the observer.Features such as large and rapid light changes,high polarization,and high luminosity can be observed.And Flat Spectrum Radio Quasar and BL Lac object are two subtypes of blazar.This article describes the nature,classification,model and observational characteristics of blazars,the radiation mechanism of BL Lac objects,etc.of active galactic nuclei,and the parameters of BL Lac Synchrotron self-Compton model parameters research.In this paper,we obtain the physical quantities from the multi-band observation data.And we determine the 8 parameters in the single-zone homogeneous SSC model with the broken double-powerlaw electronic injection.What's more,we use the SSC model to calculate two typical BL Lacs multiwavelength spectral energies to test our determined results.The results indicate that within the determination of 8 model parameters space,we calculate the theoretical photon spectrum with the model parameters,which is in favorable agreement with the quasi-simultaneously observed data of the two BL Lacs.In addition,the paper collected the quasi-simultaneous multi-band observational data of 26 peak-frequency BL Lac objects.Based on the limited results of the SSC model parameters,the energy spectrum distribution of 26 peak-frequency BL Lac objects was calculated.Through the physical quantities related to the magnetic field strength and the radius of the radiation area,using the law of dimensional analysis and the second law of dimension,the empirical formula of the magnetic field strength(B)and the radius of the radiation area(R)is proposed as follows:R/K₁ B^-1.In order to verify the proposed formula,the values of the magnetic field intensity and the radius of the radiation area are linearly regressed.According to the results,it is found that there is no correlation between the magnetic field and the radius of the radiation area.The reason is that the K₁ of different sources is ifferent.For a source,the relation between the magnetic field and the radius of the radiation area isB?R^-1,however,there is no statistical correlation.Finally,we also calculate the jet power.The results show that:(1)We found that the formula obtained through dimensional analysis is consistent with Boutelier et al.2018 formula (?),whenl (?),the resulta is coincident.(2)Statistically,there is no correlation between the magnetic field and the radius of the radiation region,because different sources have different K₁ values;(3)For the jet power,there is such a relation P_B?P_e?P_p?P_{je t}.AndP_B P_e/1.03,it is shown that the magnetic field energy density and relativistic electrons energy density are nearly evenly distributed in the jet.