93 citations · 531 across the 26 of their papers we have counts for
4 papers · 1 filter
Detection of the Intermediate-width Emission Line Region in Quasar OI 287 with the Broad Emission Line Region Obscured by the Dusty Torus
Zhenzhen Li, Hongyan Zhou, Lei Hao +8
The existence of intermediate-width emission line regions (IELRs) in active galactic nuclei has been discussed for over two decades. A consensus, however, is yet to be arrived at d…
Discovery of Extremely Broad Balmer Absorption Lines in SDSS J152350.42+391405.2
Shaohua Zhang, Hongyan Zhou, Xiheng Shi +7
We present the discovery of Balmer line absorption from H to H in an iron low-ionization broad absorption line (FeLoBAL) quasar SDSS J152350.42+391405.2 (hereafter J1523), by…
Strong Variability of Overlapping Iron Broad Absorption Lines in Five Radio-selected Quasars
Shaohua Zhang, Hongyan Zhou, Tinggui Wang +6
We present the variability study of broad absorption lines (BALs) in a uniformly radio-selected sample of 28 BAL quasars using the archival data from the FIRST Bright Quasar Survey…
A Comprehensive Study of Broad Absorption Line Quasars: I. Prevalence of HeI* Absorption Line Multiplets in Low-Ionization Objects
Wen-Juan Liu, Hongyan Zhou, Tuo Ji +13
Neutral Helium multiplets, HeI*3189,3889,10830 are very useful diagnostics to the geometry and physical conditions of the absorbing gas in quasars. So far only a handful of HeI* de…