757 citations · 1.4k across the 23 of their papers we have counts for
17 papers · 1 filter
Do all the quasars and high-excitation radio galaxies (HERGs) in the 3CRR catalog contain a magnetically arrested disk (MAD)?
Shuang-Liang Li, Wenwen Zuo, Xinwu Cao
Based on the magnetization, an accretion disk with large-scale magnetic field can be separated into either standard and normal evolution (SANE) or magnetically arrested disk (MAD),…
Rest-Frame Optical Spectroscopy of Ten z 2 Weak Emission-Line Quasars
Ying Chen, Bin Luo, W. N. Brandt +7
We present near-infrared spectroscopy of ten weak emission-line quasars (WLQs) at redshifts of , obtained with the Palomar 200-inch Hale Telescope. WLQs are an exceptional…
Optical Continuum Reverberation Mapping of a Candidate IMBH in a Nearby Seyfert 1 Galaxy
Wenwen Zuo, Hengxiao Guo, Jingbo Sun +25
To investigate the short-term variability and determine the size of the optical continuum emitting region of intermediate-mass black holes (IMBHs), we carried out high-cadence, mul…
CIV emission line properties and uncertainties in black hole mass estimates of z ~ 3.5 quasars
Wenwen Zuo, Xue-Bing Wu, Xiaohui Fan +5
Using a high luminosity ( erg s), high redshift () quasar sample of 19 quasars with optical and near-infrared spectros…
Spectroscopy of broad absorption line quasars at -- I: evidence for quasar winds shaping broad/narrow emission line regions
Weimin Yi, Wenwen Zuo, Jinyi Yang +6
We present an observational study of 22 broad absorption line quasars (BAL QSOs) at based on optical/near-IR spectroscopy, aiming to investigate quasar wind…
The Evolution of Chemical Abundance in Quasar Broad Line Region
Fei Xu, Fuyan Bian, Yue Shen +3
We study the relation between the metallicity of quasar broad line region (BLR) and black hole (BH) mass () and quasar bolometric luminosit…
Quasar Photometric Redshifts and Candidate Selection: A New Algorithm Based on Optical and Mid-Infrared Photometric Data
Qian Yang, Xue-Bing Wu, Xiaohui Fan +8
We present a new algorithm to estimate quasar photometric redshifts (photo-s), by considering the asymmetries in the relative flux distributions of quasars. The relative flux mo…
Near-IR spectroscopy of luminous LoBAL quasars at 1<z<2.5
Andreas Schulze, Malte Schramm, Wenwen Zuo +7
We present near-IR spectroscopy of 22 luminous low-ionization broad absorption line quasars (LoBAL QSOs) at redshift 1.3<z<2.5, with 12 objects at z~1.5 and 10 at z~2.3. The spectr…
Discovery of strong Balmer line absorption in two luminous LoBAL quasars at z~1.5
Andreas Schulze, Toru Misawa, Wenwen Zuo +1
We present the discovery of strong Balmer line absorption in H to H in two luminous low-ionization broad absorption line quasars (LoBAL QSOs) at z~1.5, with black hole masses…
The physical constraints on a new LoBAL QSO at z=4.82
Weimin Yi, Richard Green, Jin-Ming Bai +26
Very few low-ionization broad absorption line (LoBAL) QSOs have been found at high redshifts to date. One high-redshift LoBAL QSO, J0122+1216, was recently discovered at the Lijian…
A survey of luminous high-redshift quasars with SDSS and WISE II. the bright end of the quasar luminosity function at z ~ 5
Jinyi Yang, Feige Wang, Xue-Bing Wu +13
This is the second paper in a series on a new luminous z ~ 5 quasar survey using optical and near-infrared colors. Here we present a new determination of the bright end of the quas…
A survey of luminous high-redshift quasars with SDSS and WISE. I. target selection and optical spectroscopy
Feige Wang, Xue-Bing Wu, Xiaohui Fan +14
High-redshift quasars are important tracers of structure and evolution in the early universe. However, they are very rare and difficult to find when using color selection because o…
The Large Sky Area Multi-Object Fiber Spectroscopic Telescope Quasar Survey: Quasar Properties from First Data Release
Y. L. Ai, Xue-Bing Wu, Jinyi Yang +20
We present preliminary results of the quasar survey in Large Sky Area Multi- Object Fiber Spectroscopic Telescope (LAMOST) first data release (DR1), which includes pilot survey and…
An ultra-luminous quasar at z=5.363 with a ten billion solar mass black hole and a Metal-Rich DLA at z~5
Feige Wang, Xue-Bing Wu, Xiaohui Fan +11
We report the discovery of an ultra-luminous quasar J030642.51+185315.8 (hereafter J0306+1853) at redshift 5.363, which hosts a super-massive black hole (SMBH) with $M_{BH} = (1.07…
An ultra-luminous quasar with a twelve-billion-solar-mass black hole at redshift 6.30
Xue-Bing Wu, Feige Wang, Xiaohui Fan +10
So far, roughly 40 quasars with redshifts greater than z=6 have been discovered. Each quasar contains a black hole with a mass of about one billion solar masses (). T…
Unshifted Metastable He I* Mini-Broad Absorption Line System in the Narrow Line Type 1 Quasar SDSS J080248.18551328.9
Tuo Ji, Hongyan Zhou, Peng Jiang +11
We report the identification of an unusual absorption line system in the quasar SDSS J080248.18551328.9 and present a detailed study of the system, incorporating follow-up optic…
SDSS J013127.34032100.1: A newly discovered radio-loud quasar at with extremely high luminosity
Wei-Min Yi, Feige Wang, Xue-Bing Wu +18
Only very few z>5 quasars discovered to date are radio-loud, with a radio-to-optical flux ratio (radio-loudness parameter) higher than 10. Here we report the discovery of an optica…