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4 papers · 2 filters
The accretion ratios in Seyfert 2 galaxies with and without hidden broad-line regions
W. Bian, Q. Gu
Using a large sample of 90 Seyfert 2 galaxies (Sy2s) with spectropolarimetric observations, we tested the suggestion that the presence of hidden broad-line regions (HBLRs) in Sy2s…
Stellar and gaseous velocity dispersions in type II AGNs at 0.3<z<0.83 from the Sloan Digital Sky Survey
W. Bian, Q. Gu, Y. Zhao +2
We apply the stellar population synthesis code by Cid Fernandes et al. to model the stellar contribution for a sample of 209 type II AGNs at from the Sloan Digital Sky…
The relation between the optical spectral slope and the luminosity for 17 Palomar-Green QSOs
X. Pu, W. Bian, K. Huang
Using 7.5-year spectroscopic monitoring data of a sample of 17 Palomar-Green QSOs (PG QSOs) (z=0.061-0.371), we obtain the optical spectral slope for each object at all epochs by a…
[O III] emission line in narrow-line Seyfert 1 galaxies
Weihao Bian, Qirong Yuan, Yongheng Zhao
Three sets of two-component profiles are used to simultaneously model the [O III]4959, 5007 and H lines for the Fe II-subtracted spectra of 149 narrow line Seyfert 1 galaxie…