757 citations · 3.2k across the 45 of their papers we have counts for
45 papers
Galaxies Lighting Up: Discovery of Seventy New Turn-on Changing-look Quasars
Qian Yang, Paul J. Green, Xue-Bing Wu +3
"Changing-look quasars" (CLQs), discovered less than a decade ago, show dramatic, rapid changes in optical/UV continuum and broad line emission. The majority of CLQs have been foun…
The Sloan Digital Sky Survey Reverberation Mapping Project: Key Results
Yue Shen, Catherine J. Grier, Keith Horne +44
We present the final data from the Sloan Digital Sky Survey Reverberation Mapping (SDSS-RM) project, a precursor to the SDSS-V Black Hole Mapper Reverberation Mapping program. This…
Probing the Origin of Changing-look Quasar Transitions with Chandra
Qian Yang, Paul J. Green, Chelsea L. MacLeod +9
Extremely variable quasars can also show strong changes in broad-line emission strength and are known as changing-look quasars (CLQs). To study the CLQ transition mechanism, we pre…
The SDSS-V Black Hole Mapper Reverberation Mapping Project: Unusual Broad-Line Variability in a Luminous Quasar
Logan B. Fries, Jonathan R. Trump, Megan C. Davis +30
We present a high-cadence multi-epoch analysis of dramatic variability of three broad emission lines (MgII, H, and H) in the spectra of the luminous quasar ((5100Å) = $…
A Transient "Changing-look'' Active Galactic Nucleus Resolved on Month Timescales from First-year Sloan Digital Sky Survey V Data
Grisha Zeltyn, Benny Trakhtenbrot, Michael Eracleous +32
We report the discovery of a new ``changing-look'' active galactic nucleus (CLAGN) event, in the quasar SDSS J162829.17+432948.5 at z=0.2603, identified through repeat spectroscopy…
Finding Quasars behind the Galactic Plane. II. Spectroscopic Identifications of 204 Quasars at
Yuming Fu, Xue-Bing Wu, Linhua Jiang +21
Quasars behind the Galactic plane (GPQs) are important astrometric references and valuable probes of Galactic gas, yet the search for GPQs is difficult due to severe extinction and…
A Southern Photometric Quasar Catalog from the Dark Energy Survey Data Release 2
Qian Yang, Yue Shen
We present a catalog of 1.4 million photometrically-selected quasar candidates in the southern hemisphere over the Dark Energy Survey (DES) wide survey are…
Optical Variability of Quasars with 20-Year Photometric Light Curves
Zachary Stone, Yue Shen, Colin J. Burke +52
We study the optical photometric variability of a sample of 190 quasars within the SDSS Stripe 82 region that have long-term photometric coverage during with…
Dwarf AGNs from Optical Variability for the Origins of Seeds (DAVOS): Insights from the Dark Energy Survey Deep Fields
Colin J. Burke, Xin Liu, Yue Shen +69
We present a sample of 706, active galactic nuclei (AGNs) selected from optical photometric variability in three of the Dark Energy Survey (DES) deep fields (E2, C3, and…
A characteristic optical variability timescale in astrophysical accretion disks
Colin J. Burke, Yue Shen, Omer Blaes +8
Accretion disks around supermassive black holes in active galactic nuclei produce continuum radiation at ultraviolet and optical wavelengths. Physical processes in the accretion fl…
Varstrometry for Off-nucleus and Dual sub-Kpc AGN (VODKA): Hubble Space Telescope Discovers Double Quasars
Yu-Ching Chen, Hsiang-Chih Hwang, Yue Shen +4
Dual supermassive black holes (SMBHs) at kpc scales are the progenitor population of SMBH mergers and play an important role in understanding the pairing and dynamical evolut…
Finding Quasars behind the Galactic Plane. I. Candidate Selections with Transfer Learning
Yuming Fu, Xue-Bing Wu, Qian Yang +4
Quasars behind the Galactic plane (GPQs) are important astrometric references and useful probes of Milky Way gas. However, the search for GPQs is difficult due to large extinctions…
Dust Reverberation Mapping in Distant Quasars from Optical and Mid-Infrared Imaging Surveys
Qian Yang, Yue Shen, Xin Liu +47
The size of the dust torus in Active Galactic Nuclei (AGN) and their high-luminosity counterparts, quasars, can be inferred from the time delay between UV/optical accretion disk co…
Optical Variability of the Dwarf AGN NGC 4395 from the Transiting Exoplanet Survey Satellite
Colin J. Burke, Yue Shen, Yu-Ching Chen +4
We present optical light curves from the Transiting Exoplanet Survey Satellite (TESS) for the archetypical dwarf active galactic nucleus (AGN) in the nearby galaxy NGC 4395 hosting…
Characterization of Optical Light Curves of Extreme Variability Quasars Over a ~16-yr Baseline
Yuanze Luo, Yue Shen, Qian Yang
We study the optical light curves - primarily probing the variable emission from the accretion disk - of ~ 900 extreme variability quasars (EVQs, with maximum flux variations more…
The Third Data Release of the Beijing-Arizona Sky Survey
Hu Zou, Xu Zhou, Xiaohui Fan +45
The Beijing-Arizona Sky Survey (BASS) is a wide and deep imaging survey to cover a 5400 deg area in the Northern Galactic Cap with the 2.3m Bok telescope using two filters (…
An Unusual Mid-Infrared Flare in a Type 2 AGN: An Obscured Turning-on AGN or Tidal Disruption Event?
Qian Yang, Yue Shen, Xin Liu +5
We report the discovery of an exceptional MIR flare in a Type 2 AGN, SDSS J165726.81+234528.1, at . This object brightened by 3 mag in the Wide-field Infrared Survey Explo…
Understanding Broad Mg II Variability in Quasars with Photoionization: Implications for Reverberation Mapping and Changing-Look Quasars
Hengxiao Guo, Yue Shen, Zhicheng He +7
The broad Mg II line in quasars has distinct variability properties compared with broad Balmer lines: it is less variable, and usually does not display a "breathing" mode, the incr…
Spectral Variability of a Sample of Extreme Variability Quasars and Implications for the MgII Broad-line Region
Qian Yang, Yue Shen, Yu-Ching Chen +49
We present new Gemini/GMOS optical spectroscopy of 16 extreme variability quasars (EVQs) that dimmed by more than 1.5 mag in the band between the Sloan Digital Sky Survey (SDSS…
Mapping the Inner Structure of Quasars with Time-Domain Spectroscopy
Yue Shen, Scott Anderson, Edo Berger +40
The ubiquitous variability of quasars across a wide range of wavelengths and timescales encodes critical information about the structure and dynamics of the circumnuclear emitting…
The Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) Quasar Survey: the 4th and 5th Data Release
Su Yao, Xue-Bing Wu, Y. L. Ai +15
We present the Data Release 4&5 quasar catalog from the quasar survey by Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST), which includes quasars observed between…
Filling in the Quasar Redshift Gap at II: A Complete Survey of Luminous Quasars in the Post-Reionization Universe
Jinyi Yang, Feige Wang, Xiaohui Fan +10
We present the final results from our survey of luminous 5.5 quasars. This is the first systematic quasar survey focusing on quasars at 5.5, during the post-reio…
The ensemble photometric variability of over quasars in the Dark Energy Camera Legacy Survey and the Sloan Digital Sky Survey
Zefeng Li, Ian D. McGreer, Xue-Bing Wu +2
We present the ensemble variability analysis results of quasars using the Dark Energy Camera Legacy Survey (DECaLS) and the Sloan Digital Sky Survey (SDSS) quasar catalogs. Our dat…
The Large Sky Area Multi-Object Fibre Spectroscopic Telescope (LAMOST) Quasar Survey: Quasar Properties from Data Release Two and Three
X. Y. Dong, Xue-Bing Wu, Y. L. Ai +19
This is the second installment for the Large Sky Area Multi-Object Fibre Spectroscopic Telescope (LAMOST) Quasar Survey, which includes quasars observed from September 2013 to June…