93 citations · 531 across the 26 of their papers we have counts for
26 papers
A New Sample of 100 Intermediate-mass Black Holes Reaching
Wen-Juan Liu, Luis C. Ho, Su Yao +2
We present a systematic search for intermediate-mass black hole (IMBH) active galactic nuclei (AGNs) at using DESI DR1 spectroscopy.We identify 98 broad-line I…
The Intermediate-Mass Black Hole Reverberation Mapping Project: Scientific Overview and Sample Characteristics
Hengxiao Guo, Jiancheng Wu, Wenwen Zuo +38
Recent discoveries with the James Webb Space Telescope of massive black holes at high redshift have highlighted fundamental questions about black hole seed formation and the coevol…
A Sample of Active Galactic Nuclei with Intermediate-mass Black Holes Extended to 0.6
Wen-Juan Liu, Luis C. Ho, Xiao-Bo Dong +3
We present a sample of 930 intermediate-mass black hole (IMBH) active galactic nuclei (AGNs) with black hole masses of M, unifor…
A Uniformly Selected Sample of Low-mass Black Holes in Seyfert 1 Galaxies. III. Radio sources from the SKA pathfinders and beyond
Jin-Zhi Wu, Xiao-Bo Dong, Lei Qian +3
Occupying the intermediate-mass regime of the accretion--jet parameter space, radio continuum emission from active galactic nuclei with black hole mass M_BH <~ 10^6 Msun (low-mass…
Mrk 1239: a Type-2 Counterpart of Narrow-line Seyfert-1?
Xiang Pan, Hongyan Zhou, Chenwei Yang +10
We present new spectrophotometric and spectropolarimetric observations of Mrk 1239, one of the 8 prototypes that defines type-1 narrow-line Seyfert galaxies (NLS1s). Unlike the oth…
Local Active Galactic Nuclei with Large Broad-Hα Variability Reside in Red Galaxies
Wen-Juan Liu, Paulina Lira, Su Yao +4
Inspired by our serendipitous discovery of six AGNs with varying broad-Halpha fluxes over years out of our searching for intermediate-mass black holes (IMBHs), we conduct a systema…
Discovery of Metastable He I* 10830 Mini-broad Absorption Lines and Very Narrow Paschen Emission Lines in the ULIRG Quasar IRAS F11119+3257
Xiang Pan, Hongyan Zhou, Wenjuan Liu +7
IRAS F11119+3257 is a quasar-dominated Ultra-Luminous InfraRed Galaxy, with a partially obscured narrow-line seyfert 1 nucleus. In this paper, we present the NIR spectroscopy of F1…
Fast Inflow Directly Feeding Black Hole Accretion Disk in Quasars
Hongyan Zhou, Xiheng Shi, Weimin Yuan +21
Quasars are high-luminosity active galactic nuclei believed to be powered by accretion of interstellar matter onto a super-massive black hole (SMBH) therein. Most of the observed e…
A comprehensive and uniform sample of broad-line active galactic nuclei from the SDSS DR7
He-Yang Liu, Wen-Juan Liu, Xiao-Bo Dong +4
A new, complete sample of 14,584 broad-line AGNs at is presented, which are uncovered homogeneously from the complete database of galaxies and quasars observed spectroscop…
SDSS J094635.06+101706.1: a redshift one, very radio-loud, γ-ray emitting narrow-line Seyfert 1 galaxy
Su Yao, S. Komossa, Wen-Juan Liu +4
As hybrids of narrow-line Seyfert 1 (NLS1) galaxies and blazars, γ-ray emitting NLS1s are important probes of jet physics in the high Eddington-ratio regime. Only very few of them…
A Deeply Buried Narrow-Line Seyfert 1 Nucleus Uncovered in Scattered Light
Xiang Pan, Honglin Lu, S. Komossa +13
We present spectropolarimetric and spectrophotometric observations of the peculiar active galactic nucleus (AGN) SDSS J120300.19+162443.7 (hereafter J1203+1624) at . Its…
A Uniformly Selected Sample of Low-Mass Black Holes in Seyfert 1 Galaxies. II. The SDSS DR7 Sample
He-Yang Liu, Weimin Yuan, Xiao-Bo Dong +2
A new sample of 204 low-mass black holes (LMBHs) in active galactic nuclei (AGNs) is presented with black hole masses in the range of (1-20) * 10^5 M_sun. The AGNs are selected fro…
Reddening and He I* Absorption Lines in Three Narrow-line Seyfert 1 Galaxies
Shaohua Zhang, Hongyan Zhou, Xiheng Shi +6
We report the detection of heavy reddening and the He I* absorption lines at the AGNs' redshift in three Narrow-line Seyfert 1 galaxies: SDSS J091848.61+211717.0, SD…
Low-mass Active Galactic Nuclei on the Fundamental Plane of Black Hole Activity
Lei Qian, Xiao-Bo Dong, Fu-Guo Xie +2
It is widely known that in active galactic nuclei (AGNs) and black hole X-ray binaries (BHXBs), there is a tight correlation among their radio luminosity (), X-ray luminosity…
Photoionization-driven Absorption Lines Variability in Balmer Absorption Line Quasar LBQS 1206+1052
Luming Sun, Hongyan Zhou, Tuo Ji +10
In this paper we present an analysis of absorption line variability in mini-BAL quasar LBQS 1206+1052. The SDSS spectrum demonstrates that the absorption troughs can be divided int…
A Ringed Dwarf LINER 1 Galaxy Hosting an Intermediate-mass Black Hole with Large-scale Rotation-like Hα Emission
Wen-Juan Liu, Lei Qian, Xiao-Bo Dong +7
We report the discovery of a 20-kpc-sized Hα emission in SDSS J083803.68+540642.0, a ringed dwarf galaxy (M = -17.89 mag) hosting an accreting intermediate-mass black hole at z…
Ultraviolet and Optical Emission-line Outflows in the Heavily Obscured Quasar SDSS J000610.67+121501.2: At the Scale of the Dusty Torus and Beyond
Shaohua Zhang, Hongyan Zhou, Xiheng Shi +7
Broad emission-line outflows of active galactic nuclei (AGNs) have been proposed for many years but are very difficult to quantitatively study because of the coexistence of the gra…
The Redshifted Hydrogen Balmer and Metastable He I Absorption Line System in Mini-FeLoBAL Quasar SDSS J112526.12+002901.3: A Parsec Scale Accretion Inflow?
Xi-Heng Shi, Peng Jiang, Hui-Yuan Wang +4
The accretion of interstellar medium onto the central super massive black holes is widely accepted as the source of the gigantic energy released by the active galactic nuclei. But…
SDSS J163459.82+204936.0: A Ringed Infrared-Luminous Quasar with Outflows in both Absorption and Emission Lines
Wen-Juan Liu, Hong-Yan Zhou, Ning Jiang +9
SDSS J1634+2049 is a local (z = 0.1293) infrared-luminous quasar with LIR= 10^11.91 Lsun. We present a detailed multiwavelength study of both the host galaxy and the nucleus. The h…
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…
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…
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…