Studying On The Spectral Energy Distribution And Evolution Sequence Of Blazars

In this paper,we mainly study evolution sequence and the physical properties of Fermi blazars jet.This paper firstly introduces the basic characteristics,classification and standard model of active galactic nuclei,as well as the observation characteristics,energy spectrum distribution,evolution sequence and radiation mechanisms of blazars.Then,we introduce the leptons model and hadrons model.Active galactic nuclei(AGNs)is a hot topic in modern astrophysics,and Blazars is an ideal object for research.In this paper,the main object of the study is Feimi blazars,we compile the multi-wavelength quasi-simultaneous data of 129 Fermi blazars.Using the Logarithmic parabola to fit the spectra energy distribution(SED)of the source,we obtain the peak frequency of synchrotron emission(v_s),peak luminosity of synchrotron emission(L_s),and other parameters.The results of correlation analysis indicate that,(1)there is a significantly inverse correlation betweenL_s andv_s.This correlation is detailed enough to sustain the blazar evolution sequence along “FSRQs?LBLs?HBLs”;(2)A low-mass black hole in the galaxy center results to a blazar with lowv_s and lowL_s in thes L_s-v frame.Our research is fit the multi-wavelength quasi-simultaneous data of 55 Fermi blazars through the cone jet model,and investigate the physical properties of objects jets.By the2?-minimization fitting procedure,the best-fit parameters are found to take a statistical analysis with others we collected.The results of statistical analysis are summarized as follows:(1)The jet power calculated by modelling the SED is larger than the Jet kinetic power based on X-ray cavities;(2)There is no correlation between Doppler factor d cand magnetic field(B);(3)There is a significantly correlation between jet power and accretion disk luminosity,and the BZ mechanism can well explain the origin of BL Lac jet energy rather than the FSRQs;(4)Our research shows a significant correlation between jet power and the black hole mass.The above studies indicate that,The early stage of the evolution of FSRQs,the blazar evolution sequence along “FSRQs?LBLs?HBLs”;The jet energy of BL Lac and FSRQs is different in the process of interpreting the jet emission.