A Comparative Study Of The Properties Of Type ? Active Galactic Nuclei And Other Types Of Active Galactic Nuclei

Active galactic nucleus(AGN)and its host galaxy are co-evolution.AGN feedback plays a very important role in the evolution of galaxies.Outflow is the most common form of AGN feedback.The most common way to study the outflow in the optical band is to use the blue asymmetry of[O_?]?5007 emission-line profile in the narrow line region of AGN and its bulk blueshift with respect to the host galaxy.Some recent studies on the outflow of local low luminosity type ? AGN show that:The higher the Eddington rate,the stronger the blue asymmetry of the[O_?]?5007 emission-line,the more obvious the bulk blueshift with respect to the host galaxy,and the host galaxy has a relatively young stellar populations.One of the work of this paper is to explore whether these physical parameters have the same change trend for type ? AGN with high luminosity and high redshift?In addition,some studies have pointed out that the dip angle effect and Eddington rate of AGN are two important parameters that dominate the observation properties of AGN spectral lines.The AGN unification think that the dip angle effect is the main factor to distinguish the observation characteristics of type ? and ? AGN and the two are essentially the same.The galaxy merging model holds that type ? and type ? AGNs are at different stages of AGN evolution,and their essence is different.Due to the shielding effect of obscuring torus,high luminosity type ? AGN is difficult to find.At present,there are few samples,and the research on high luminosity type ? AGN is far less extensive and in-depth than that on type I AGN.So,a systematic and detailed study of large sample type ? AGN and comparison with other types of AGN are very important to understand the formation of black holes and galaxy evolution in the center of AGN and test the unified model of AGN.Thus,using the latest dr16 spectral data released by SDSS to expand the current high luminosity type ? AGN samples and make a preliminary comparison with the related properties of type ? AGN is another work of this paper.The conclusions are as follows:1?The blue asymmetry of[O_?]?5007 emission-line profile of high luminosity type ?AGN is more obvious,the composition of Galaxy star family is younger,and the Eddington rate is larger.This work verifies that the evolution of AGN is related to the Galactic environment.The Eddington rate changes from high state to low state with the age of the galaxy.This trend is not only true in low-light neighbor type ? AGN,but also in high-light,high redshift type ?AGN(z<1).2?We compare the[O_?]?5007 profiles of type ? and ? AGNs at the same luminosity,and preliminarily conclude that the profile of type ? AGN is more blue asymmetry than that of type II AGN.This result also preliminarily validates that the inclination of the obscuring torus relative to the observer has an effect on the spectrum profile in the AGN unified model.Therefore,the influence of dip angle on AGN spectral line should be considered when discussing the relationship between AGN spectral line properties and physical parameters such as Eddington rate.