347 citations · 5.6k across the 141 of their papers we have counts for
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X-Ray Properties of Narrow-Line Seyfert 1 Galaxies with Very Small Broad-Line Widths
Y. L. Ai, W. Yuan, H. Y. Zhou +2
Narrow-line Seyfert\,1 galaxies (NLS1s) with very small broad-line widths (say, FWHM(\hb) $\la $ 1200\,\kms) represent the extreme type of Seyfert\,1 galaxies that have small black…
High Dust Depletion in Two Intervening Quasar Absorption Line Systems with the 2175-Å Extinction Bump at
Peng Jiang, Jian Ge, J. Xavier Prochaska +3
We present the column densities of heavy-elements and dust depletion studies in twostrong Mg~II absorption systems at displaying the 2175-Å dust extinction feature. Colu…
The Prevalence of Narrow Optical Fe II Emission Lines in Type 1 Active Galactic Nuclei
Xiao-Bo Dong, Luis C. Ho, Jian-Guo Wang +4
From detailed spectral analysis of a large sample of low-redshift active galactic nuclei (AGNs) selected from the Sloan Digital Sky Survey, we demonstrate---statistically for the f…
On the scattering enhancement of Nv1240 emission line of quasi-stellar objects
Huiyuan Wang, Tinggui Wang, Weimin Yuan +3
The Nv emission line of active galactic nuclei shows peculiar behavior in the line--continuum correlation, which may be indicative of an extra line component in addition to that fr…
Dependence of the optical/UV variability on the emission line properties and Eddington ratio in active galactic nuclei
Y. L. Ai, W. Yuan, H. Y. Zhou +4
The dependence of the long-term optical/UV variability on the spectral and the fundamental physical parameters for radio-quiet active galactic nuclei (AGNs) is investigated. The mu…
Low-z MgII Broad Absorption-Line Quasars from the Sloan Digital Sky Survey
Shaohua Zhang, Ting-Gui Wang, Huiyuan Wang +3
We present a sample of 68 low-z MgII low-ionization broad absorption-line (loBAL) quasars. The sample is uniformly selected from the SDSS5 according to the following criteria: (1)…