The Research about Radiation Characteristics and Evolutionary Sequence in Fermi Blazars

In this paper, we collected and calculated 734 samples of Fermi blazars. the sample included 322 BL Lac objects(148 High-frequency peaked BL Lacs, 73 Intermediate-frequency peaked BL Lacs, 101 Low-frequency peaked BL Lacs) and 412 flat spectrum radio quasars(FSRQs) (18 High synchrotron peaked FSRQs, 45 Intermediate synchrotron peaked FSRQs, 349 Low synchrotron peaked FSRQs). Then the distribution of redshift, black hole mass and gamma ray luminosity of each subclass were researched, and the relationships between redshift, BH mass and gamma ray luminosity were discussed. The results are as follows:(1) According to the redshift and gamma ray luminosity from high to low,the evolution sequence of Fermi blazars follows:FSRQs→BL Lacs, and HSPs→ISPs→LSPs, but the evolution sequence obtained from high to low black hole mass is different. This may be due to the estimation error of the black hole mass and the small number of black hole mass samples; (2) there is a significant positive correlation between the redshift and black hole mass, between black hole mass and gamma ray luminosity of each subclass of Fermi blazars; (3) There is a significant inverse correlation between either the red shift or the gamma ray luminosity and the synchronous peak frequency of each subclass of Fermi blazars, there is no correlation between black hole mass and synchronous peak frequency.