9 citations · 11 across the 15 of their papers we have counts for
14 papers · 1 filter
SDSS J153231.80+420342.7: a triple black hole candidate with a close binary black hole
Qi Zheng, YiWen Jiang, Xue-Guang Zhang +1
We report a triple black hole candidate with a close binary black hole (BBH) in the blue quasar SDSS J153231.80+420342.7 (=SDSS J1532) at a redshift of 0.209. It shows double-peake…
Spectroscopic study of the broad component of [O III]λ5007 profile in type 1 AGNs
Qi Zheng, Yansong Ma, Xueguang Zhang +1
The spectra of type 1 active galactic nuclei (AGNs) often exhibit broad component in [O III]5007, which are typically blue-shifted and associated with strong outflows. We system…
Changing-look Active Galactic Nuclei from the Dark Energy Spectroscopic Instrument. V. Dramatic Variability in High-Ionization Broad Emission Lines
Zhi-Qiang Chen, Jun-Jie Jin, Wei-Jian Guo +10
We present a systematic search for changing-look (CL) quasars at high redshift z > 0.9 by cross-matching the spectroscopic datasets from the Dark Energy Spectroscopic Instrument Da…
Dual core system candidates: a sample of objects with large velocity offset between absorption and narrow emission lines
Zheng Qi, Zhang Xueguang, Yuan Qirong
We present a sample of 28 objects at z<0.3 from Data Release 16 of the Sloan Digital Sky Survey (SDSS DR16) with large velocity offset (> 200 km/s) of narrow H and H emission…
AGN-Driven Biconical Outflows as the Origin of the Double-Peaked [O~{\sc iii}] doublet in SDSS J134733.36+121724.27
PeiZhen Cheng, XingQian Chen, GuiLin Liao +4
In this manuscript, we recheck the spectroscopic properties of SDSS J134733.36+121724.27 (4C+12.50), confirming the presence of the double-peaked [O~{\sc iii}]Å…
On type 1 active galactic nuclei with double-peaked [O~{\sc iii}]. II. properties of long-term optical variability
Qi Zheng, Xingyv Zhu, Xueguang Zhang +1
Double-peaked \oiii~profiles could potentially indicate kiloparsec-scale dual AGNs. We analyze long-term optical light curves of 35 type 1 AGNs with such features from our recent c…
A gravitational acceleration model to explain the double-peaked narrow emission lines shifted in the same direction
XingQian Chen, GuiLin Liao, Qi Zheng +1
In this manuscript, we propose, for the first time, an oversimplified but potentially effective gravitational acceleration model to interpret the double-peaked narrow emission line…
A candidate for True Type-2 AGN without hidden central BLRs Identified by central Tidal Disruption Event
Gu Ying, Zheng Qi, Cheng Peizheng +4
In this manuscript, through applications of TDE (tidal disruption event) expected variability properties, a potential candidate for True type-2 AGN without hidden central broad lin…
An improved Seyfert-LINER classification line in the [N~{\sc ii}] BPT diagram
PeiZhen Cheng, XingQian Chen, GuiLin Liao +3
In this manuscript, an improved Seyfert-LINER classification line (= S-L line) is proposed in the [N~{\sc ii}] BPT diagram, based on a sample of 47,968 low redshift narrow emission…
Optical QPOs with dual periodicities 1103days and 243days in the blue quasar SDSS J100438.8+151056
GuiLin Liao, XingQian Chen, Qi Zheng +2
This manuscript investigates the possible existence of a binary supermassive black holes (BSMBH) system in the blue quasar SDSS J100438.8+151056 (=SDSS J1004+1510) at z=0.219 based…
The orbital kinematics of kpc-scale dual-core systems with double-peaked narrow emission lines
XingQian Chen, Peizhen Cheng, Ying Gu +3
In this manuscript, based on SDSS photometry and spectroscopy, a method is proposed to test the hypothesis that the orbital kinematics of kpc-scale dual-core systems can lead to do…
On type 1 active galactic nuclei with double-peaked [O~{\sc iii}]. I. data sample and basic results
Qi Zheng, Yansong Ma, Xueguang Zhang +2
Double-peaked narrow emission lines (DPNELs) might be evidence for the existence of kpc-scale dual AGNs. There are so far large samples of objects with DPNELs in narrow emission li…
SDSS J222428.53+261423.2: unique emission lines properties unveil a sub-kiloparsec dual AGN candidate
Qi Zheng, XueGuang Zhang, QiRong Yuan +2
In this paper, we presented a detailed analysis of the Sloan Digital Sky Survey optical spectrum of a new sub-kpc scale dual AGN candidate SDSS J222428.53+261423.2 (=SDSS J2224). T…
Evidence to disfavour dual core system leading to double-peaked narrow emission lines
Zhang XueGuang, Zheng Qi
In this manuscript, an interesting method is proposed to test dual core system for double-peaked narrow emission lines, through precious dual core system with double-peaked narrow…