9 citations · 18 across the 10 of their papers we have counts for
13 papers
Aperture-dependent [O III] profile variability: Clues to the nature of double-peaked narrow emission lines
Qi Zheng, Xingqian Chen, Zhegeng Chen +2
We propose a simple and practical aperture-dependent method for investigating the physical origin of double-peaked narrow emission lines (DPNELs). Spectroscopic observations obtain…
Galaxy Clusters from the DESI Legacy Imaging Surveys. IV. Alignment of Member Galaxy Orientations at z < 0.5
Zhaobin Chen, Yizhou Gu, Shufei Liu +2
Using DESI photometric catalog data, we systematically analyze the spatial alignment of star-forming galaxies (SFGs) and quiescent galaxies (QGs) in clusters. The results reveal th…
Fountain pattern of baryon cycle revealed in galaxy ecosystems
Chengyu Ma, Yangyao Chen, Enci Wang +11
Baryons in galaxy ecosystems are believed to undergo continuous cycles of inflow and outflow, forming fountain-like patterns that encode key information about how galaxies acquire…
Radio Activity Across Accretion State Changes in Changing-look AGNs: Insights from FIRST and VLASS over Two Decades
Zhi-Qiang Chen, Wei-Jian Guo, Victoria A. Fawcett +8
Changing-look active galactic nuclei (CL-AGNs) provide a unique opportunity to probe the coupling between accretion flows and relativistic jets in supermassive black holes. We inve…
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…
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…
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…
A first measurement of galaxy merger rate increasing in dynamically colder protoclusters at cosmic noon
Shuang Liu, Xian Zhong Zheng, Valentino Gonzalez +10
The process of galaxy cluster formation likely leaves an imprint on the properties of its individual member galaxies. Understanding this process is essential for uncovering the evo…
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…
Spectral Energy Distributions and Masses of 304 M31 Old Star Clusters
Jun Ma, Song Wang, Zhenyu Wu +8
This paper presents CCD multicolor photometry for 304 old star clusters in the nearby spiral galaxy M31. Of which photometry of 55 star clusters is first obtained. The observations…