SIMBAD references

We perform a systematic study of outflow in the narrow-line region (NLR) of active galactic nuclei (AGNs) at z ∼ 0.4-0.8 based upon a large sample of ∼900 quasars at z ∼ 0.4-0.8. The sample is extracted from the Sloan Digital Sky Survey by mainly requiring that (1) the g-band magnitude is brighter than 19 mag and (2) the [O III]λ5007 emission line has a signal-to-noise ratio larger than 30. Profiles of multiple emission lines are modeled by a sum of several Gaussian functions. The spectral analysis allows us to identify (1) a prevalence of both [O III]λ5007 line blue asymmetry and bulk velocity blueshift of both [Ne III]λ3869 and [Ne III]λ3426 lines, when the [O II]λ3727 line is used as a reference. The velocity offset of the [O III]λ5007 line is, however, distributed around a value of zero, except for a few outliers. (2) Not only the significant [O III]λ5007 line asymmetry, but also the large bulk velocity offsets of [Ne III]λ3869 and [Ne V]λ3426 emission lines tend to occur in the objects with high L/L_Edd, which is considerably consistent with the conclusions based on local AGNs. With three M_BH estimation methods, the significance level of the trend is found to be better than 2.9σ, 3.2σ, and 1.8σ for [O III], [Ne III], and [Ne V], respectively. After excluding the role of radio jets, the revealed dependence of NLR gas outflow on L/L_Edd allows us to argue that the pressure caused by the wind/radiation launched/emitted from a central supermassive black hole is the most likely origin of the outflow in these distant quasars, which implies that the outflow in luminous AGNs up to z ∼ 1 have the same origin.