129 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Chinese Academy of SciencesCN84 papers
- University of Science and Technology of ChinaCN81 papers
- National Astronomical ObservatoriesCN53 papers
- Yunnan ObservatoriesCN25 papers
- Shanghai Astronomical ObservatoryCN22 papers
- Anhui Normal UniversityCN20 papers
- University of Chinese Academy of SciencesCN19 papers
- Purple Mountain ObservatoryCN16 papers
- Nanjing Institute of Astronomical Optics & TechnologyCN15 papers
- UNSW SydneyAU15 papers
- Guangzhou UniversityCN12 papers
- Australian Astronomical ObservatoryAU11 papers
8 papers · 2 filters
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…
Line and Continuum Variability in Active Galaxies
Y. E. Rashed, A. Eckart, M. Valencia-S. +5
We compared optical spectroscopic and photometric data for 18 AGN galaxies over 2 to 3 epochs, with time intervals of typically 5 to 10 years. We used the Multi-Object Double Spect…
The Radio Properties of Radio-Loud Narrow-Line Seyfert 1 Galaxies on Parsec Scales
Minfeng Gu, Yongjun Chen, S. Komossa +5
We present the detection of compact radio structures of fourteen radio-loud narrow line Seyfert 1 (NLS1) galaxies from Very Long Baseline Array observations at 5 GHz, which were pe…
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…
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…