192 citations · 973 across the 35 of their papers we have counts for
35 papers
H Reverberation Mapping from Broad-band Photometry of Dwarf Seyfert 1 Galaxy NGC 4395
Huapeng Gu, Xue-Bing Wu, Yuhan Wen +2
NGC 4395 is a dwarf Seyfert 1 galaxy with a possible intermediate-mass black hole of several solar masses in its center. As a well-studied object, its broad line region…
The Seoul National University AGN Monitoring Project III: H lag measurements of 32 luminous AGNs and the high-luminosity end of the size--luminosity relation
Jong-Hak Woo, Shu Wang, Suvendu Rakshit +28
We present the main results from a long-term reverberation mapping campaign carried out for the Seoul National University Active Galactic Nuclei (AGN) Monitoring Project. High-qual…
On the nature of the continuum reverberation of X-ray/UV and optical emission of IRAS 09149-6206
D. H. González-Buitrago, Ma. T. García-Díaz, F. Pozo Nuñez +1
We present the results of a continuum reverberation mapping study of the radio-quiet Seyfert 1 galaxy IRAS 09149-6206. The analysis was performed using X-ray, UV and optical observ…
What Does the Virial Coefficient of the \Hb Broad-Line Region Depend On?
Lizvette Villafaña, Peter R. Williams, Tommaso Treu +37
We combine our dynamical modeling black hole mass measurements from the Lick AGN Monitoring Project 2016 sample with measured cross-correlation time lags and line widths to recover…
Estimating AGN Black Hole Masses via Continuum Reverberation Mapping in the Era of LSST
Shu Wang, Hengxiao Guo, Jong-Hak Woo
Spectroscopic reverberation mapping (RM) is a direct approach widely used to estimate the mass of black holes (BHs) in active galactic nuclei (AGNs). However, it is very time consu…
Evidence for quasar fast outflows being accelerated at the scale of tens of parsecs
Zhicheng He, Guilin Liu, Tinggui Wang +14
Quasar outflows may play a crucial role in regulating the host galaxy, although the spatial scale of quasar outflows remain a major enigma, with their acceleration mechanism poorly…
The Lick AGN Monitoring Project 2016: Dynamical Modeling of Velocity-Resolved H\b{eta} Lags in Luminous Seyfert Galaxies
Lizvette Villafaña, Peter R. Williams, Tommaso Treu +62
We have modeled the velocity-resolved reverberation response of the H\b{eta} broad emission line in nine Seyfert 1 galaxies from the Lick Active Galactic Nucleus (AGN) Monitioring…
The Lick AGN Monitoring Project 2016: Velocity-Resolved Hβ Lags in Luminous Seyfert Galaxies
Vivian U, Aaron J. Barth, H. Alexander Vogler +61
We carried out spectroscopic monitoring of 21 low-redshift Seyfert 1 galaxies using the Kast double spectrograph on the 3-m Shane telescope at Lick Observatory from April 2016 to M…
Extreme Variability Quasars in Their Various States. I: The sample selection and composite SDSS spectra
Wenke Ren, Junxian Wang, Zhenyi Cai +1
Extremely variable quasars (EVQs) are a population of sources showing large optical photometric variability revealed by time-domain surveys. The physical origin of such extreme var…
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…
Probing Early Super-massive Black Hole Growth and Quasar Evolution with Near-infrared Spectroscopy of 37 Reionization-era Quasars at 6.3 < z <= 7.64
Jinyi Yang, Feige Wang, Xiaohui Fan +18
We report the results of near-infrared spectroscopic observations of 37 quasars in the redshift range , including 32 quasars at , forming the largest quasar n…
Very Large Array imaging rules out precessing radio jets in three DESSDSS-selected candidate periodic quasars
Yu-Ching Chen, Xin Liu, Wei-Ting Liao +1
Periodic quasars have been suggested as candidates for hosting binary supermassive black holes (SMBHs), although alternative scenarios remain possible to explain the optical light…
The Deviation of the Broad-line Region Size Between Reverberation Mapping and Spectroastrometry
Xiaer Zhang, Zhicheng He, Tinggui Wang +1
The combination of the linear size from reverberation mapping (RM) and the angular distance of the broad line region (BLR) from spectroastrometry (SA) in active galactic nuclei (AG…
A sharp rise in the detection rate of broad absorption line variations in a quasar SDSS J141955.26+522741.1
Qinyuan Zhao, Zhicheng He, Guilin Liu +4
We present an analysis of the variability of broad absorption lines (BALs) in a quasar SDSS J141955.26+522741.1 at with 72 observations from the Sloan Digital Sky Survey…
On the AGN Nature of Broad Balmer Emission in Four Low-Redshift Metal-Poor Galaxies
Colin J. Burke, Xin Liu, Yu-Ching Chen +2
We report on continued, 15 year-long, broad Balmer emission lines in three metal-poor dwarf emission-line galaxies selected from Sloan Digital Sky Survey spectroscopy. The pe…
Candidate Periodically Variable Quasars from the Dark Energy Survey and the Sloan Digital Sky Survey
Yu-Ching Chen, Xin Liu, Wei-Ting Liao +62
Periodically variable quasars have been suggested as close binary supermassive black holes. We present a systematic search for periodic light curves in 625 spectroscopically confir…
An Extraordinary Response of Iron Emission to the Central Outburst in a Tidal Disruption Event Candidate
Zhicheng He, Ning Jiang, Tinggui Wang +9
Understanding the origin of \feii\ emission is important because it is crucial to construct the main sequence of Active Galactic Nuclei (AGNs). Despite several decades of observati…
Modeling Quasar UV/Optical Variability with the Corona-heated Accretion-disk Reprocessing (CHAR) Model
Mouyuan Sun, Yongquan Xue, Hengxiao Guo +7
The rest-frame UV/optical variability of the quasars in the Sloan Digital Sky Survey (SDSS) Stripe 82 is used to test the Corona-Heated Accretion-disk Reprocessing (CHAR) model of…
Discovery of a Candidate Binary Supermassive Black Hole in a Periodic Quasar from Circumbinary Accretion Variability
Wei-Ting Liao, Yu-Ching Chen, Xin Liu +68
Binary supermassive black holes (BSBHs) are expected to be a generic byproduct from hierarchical galaxy formation. The final coalescence of BSBHs is thought to be the loudest gravi…
High-redshift Extreme Variability Quasars from Sloan Digital Sky Survey Multi-Epoch Spectroscopy
Hengxiao Guo, Jiacheng Peng, Kaiwen Zhang +9
We perform a systematic search for high-redshift ( 1.5) extreme variability quasars (EVQs) using repeat spectra from the Sixteenth Data Release of Sloan Digital Sky Survey, wh…
Dark Energy Survey Identification of A Low-Mass Active Galactic Nucleus at Redshift 0.823 from Optical Variability
Hengxiao Guo, Colin J. Burke, Xin Liu +56
We report the identification of a low-mass AGN, DES J02180430, in a redshift galaxy in the Dark Energy Survey (DES) Supernova field. We select DES J02180430 as an…
The Curious Case of PHL 293B: A Long-Lived Transient in a Metal-Poor Blue Compact Dwarf Galaxy
Colin J. Burke, Vivienne F. Baldassare, Xin Liu +51
We report on small-amplitude optical variability and recent dissipation of the unusually persistent broad emission lines in the blue compact dwarf galaxy PHL 293B. The galaxy's unu…
Properties of radio-loud quasars in Sloan Digital Sky Survey
Haritma Gaur, Minfeng Gu, S. Ramya +1
We present a study of a sample of 223 radio-loud quasars (up to redshift 0.3) in order to investigate their spectral properties. Twenty-six of these radio-loud quasars are ident…
A Trio of Massive Black Holes Caught in the Act of Merging
Xin Liu, Meicun Hou, Zhiyuan Li +6
We report the discovery of SDSS J0849+1114 as the first known triple Type 2 Seyfert nucleus. It represents three active black holes that are identified from new spatially resolved…