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Keck/ESI Long-slit Spectroscopy of SBS 1421+511: A Recoiling Quasar Nucleus in An Active Galaxy Pair?
Luming Sun, Hongyan Zhou, Lei Hao +6
We present Keck/ESI long-slit spectroscopy of SBS 1421+511, a system consisting of a quasar at z = 0.276 and an extended source 3" northern to the quasar. The quasar shows a blue-s…
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…
Cold gas and a Milky Way-type 2175 Å bump in a metal-rich and highly depleted absorption system
Jingzhe Ma, Paul Caucal, Pasquier Noterdaeme +9
We report the detection of a strong Milky Way-type 2175 Å extinction bump at = 2.1166 in the quasar spectrum towards SDSS J121143.42+083349.7 from the Sloan Digital Sky Surv…
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…