Publications (41)
Probing the environments of FRI and FRII radio galaxies in LoTSS DR2 with galaxy clusters
Tong Pan, Yuming Fu, H. J. A. Rottgering +7
The origin of the Fanaroff--Riley Class I/II (FRI/FRII) morphological dichotomy remains uncertain. We investigate whether cluster-scale environment contributes to this distinction…
Forecasting Supernova Observations with the CSST: I. Photometric Samples
Chengqi Liu, Youhua Xu, Xianmin Meng +8
The China Space Station Telescope (CSST, also known as Xuntian) is a serviceable two-meter-aperture wide-field telescope operating in the same orbit as the China Space Station. The…
The environments of radio galaxies and quasars in LoTSS data release 2
Tong Pan, Yuming Fu, H. J. A. Rottgering +4
Aims. The orientation-based unification scheme of radio-loud active galactic nuclei (AGNs) asserts that radio galaxies and quasars are essentially the same type of object, but view…
The Large Sky Area Multi-object Fiber Spectroscopic Telescope (LAMOST) Quasar Survey: Quasar Properties from Data Release Six to Nine
Jun-Jie Jin, Xue-Bing Wu, Yuming Fu +10
We report the fourth installment in the series of the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) Quasar Survey, which includes quasars observed between Sept…
The H broadband photometric reverberation mapping of four Seyfert 1 galaxies
Qinchun Ma, Xue-Bing Wu, Huapeng Gu +2
Broadband photometric reverberation mapping (PRM) have been investigated for AGNs in recent years, but mostly on accretion disk continuum RM. Due to the small fraction of broad emi…
The CatSouth Quasar Candidate Catalog for the Southern Sky and a Unified All-Sky Catalog Based on Gaia DR3
Yuming Fu, Xue-Bing Wu, R. J. Bouwens +12
The Gaia DR3 has provided a large sample of more than 6.6 million quasar candidates with high completeness but low purity. Previous work on the CatNorth quasar candidate catalog ha…
The changing-look AGN SDSS J101152.98+544206.4 is returning to a type I state
Bing Lyu, Xue-Bing Wu, Yuxuan Pang +11
Aims. We reported the discovery that a changing-look AGN SDSS J101152.98+544206.4 (J1011+5442 for short) gradually returns to the type 1 state after a short period between 2014 and…
Quasar identifications from the slitless spectra: a test from 3D-HST
Yuxuan Pang, Xue-Bing Wu, Yuming Fu +4
Slitless spectroscopy is a traditional method for selecting quasars. In this paper, we develop a procedure for selecting quasars (QSOs) using the 3D-HST G141 slitless spectra. We i…
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…
CURLING -- III. Identifying Candidates of Wide-separation Gravitationally Lensed Quasars from the CatNorth Catalogue
Di Wu, Zizhao He, Nan Li +5
Wide-separation lensed quasars (WSLQs) are a rare subclass of strongly lensed quasars produced by massive galaxy clusters. They provide valuable probes of dark-matter halos and qua…
Mating Siegel and parabolic quadratic polynomials
Yuming Fu, Fei Yang
Let be the quadratic polynomial having an indifferent fixed point at the origin. For any bounded type irrational number $θ\in\mathbb{R}\setminus\mathbb{Q…
Area and Hausdorff dimension of SierpiÅski carpet Julia sets
Yuming Fu, Fei Yang
We prove the existence of rational maps whose Julia sets are SierpiÅski carpets having positive area. Such rational maps can be constructed such that they either contain a Cremer…
Cubic polynomials with a 2-cycle of Siegel disks
Yuming Fu, Jun Hu, Oleg Muzician
Under conjugation by affine transformations, the dynamical moduli space of cubic polynomials with a -cycle of Siegel disks is parameterized by a three-punctured complex plan…
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…
Discovery of 21 New Changing-look AGNs in Northern Sky
Qian Yang, Xue-Bing Wu, Xiaohui Fan +12
The rare case of changing-look (CL) AGNs, with the appearance or disappearance of broad Balmer emission lines within a few years, challenges our understanding of the AGN unified mo…
Finding Quasars Behind the Galactic Plane: Spectroscopic Identifications of ~1300 New Quasars at |b|<=20 degree from LAMOST DR10
Zhi-Ying Huo, Yuming Fu, Yang Huang +10
Quasars behind the Galactic plane (GPQs) are excellent tracers to probe the chemistry and kinematics of the interstellar/intergalactic medium (ISM/IGM) of the Milky Way along sight…
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…
Chandra Detection of Three X-ray Bright Quasars at z>5
Jiang-Tao Li, Feige Wang, Jinyi Yang +8
We report Chandra detection of three UV bright radio quiet quasars at . We have collected a sufficient number of photons to extract an X-ray spectrum of each quasar to m…
Radio-detected Lya emitters at 1.88 < z < 3.52: AGN fraction and Lya emission
Sai Zhai, Huub Röttgering, Anniek J. Gloudemans +10
Lya emitters (LAEs) are galaxies with strong Lya emission, tracing early star formation and ionizing radiation. Their connection to active galactic nuclei (AGNs) is key to understa…
QHSC: The Quasar Candidate Catalog for the Hyper Suprime-Cam Subaru Strategic Program
Rui Zhu, Xue-Bing Wu, Yuxuan Pang +1
The Hyper Suprime-Cam Subaru Strategic Program (HSC-SSP) is a deep wide-field multi-band imaging survey consisting of three layers (Wide, Deep, and UltraDeep), with the Wide layer…
CatNorth: An Improved Gaia DR3 Quasar Candidate Catalog with Pan-STARRS1 and CatWISE
Yuming Fu, Xue-Bing Wu, Yifan Li +17
A complete and pure sample of quasars with accurate redshifts is crucial for quasar studies and cosmology. In this paper, we present CatNorth, an improved Gaia DR3 quasar candidate…
Highly Variable Quasar Candidates Selected from 4XMM-DR13 with Machine Learning
Heng Wang, Yanli Ai, Yanxia Zhang +6
We present a sample of 12 quasar candidates with highly variable soft X-ray emission from the 4th XMM-newton Serendipitous Source Catalog (4XMM-DR13) using random forest. We obtain…
Quasar Photometric Redshifts and Candidate Selection: A New Algorithm Based on Optical and Mid-Infrared Photometric Data
Qian Yang, Xue-Bing Wu, Xiaohui Fan +8
We present a new algorithm to estimate quasar photometric redshifts (photo-s), by considering the asymmetries in the relative flux distributions of quasars. The relative flux mo…
Testing [O II] as a Star Formation Rate Tracer in Quasar Host Galaxies
Xiaotong Feng, Xue-Bing Wu, Yuming Fu +3
The [O II] emission line is a widely used star formation rate (SFR) tracer. However, its application to type I quasars is not straightforward, because the line can be…
Far-Infrared Star Formation Rates of Quasar Host Galaxies from Multiwavelength Spectral Energy Distribution Decomposition
Xiaotong Feng, Xue-Bing Wu, Yuming Fu +3
Reliable star formation rates (SFRs) are essential for studying the connection between black hole growth and quasar host galaxies. We study the far-infrared (FIR) SFRs and the host…
A Rare Eddington-Limited, Heavily Obscured Low-Mass Active Galactic Nucleus Likely Triggered by a Galaxy Merger
Shouyi Wang, Fan Zou, Chang-Hao Chen +7
We report a detailed analysis of GAMA 376183, a powerful, heavily obscured active galactic nucleus (AGN) hosted by a low-mass galaxy () likely ex…
Systematic Analysis of Changing-look AGN Variability Using ZTF Light Curves
Huimei Wang, Xue-Bing Wu, Nanyu Yao +5
Changing-look active galactic nuclei (CLAGNs) are a unique population of AGNs that exhibit the appearance (turn-on) or disappearance (turn-off) of broad emission lines. This study…
The Large Sky Area Multi-object Fiber Spectroscopic Telescope (LAMOST) Quasar Survey: Quasar Properties from Data Release 10 to 12
Bing Lyu, Xue-Bing Wu, Jun-Jie Jin +9
We present the quasar catalog from Data Releases 10 to 12 of the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) Quasar Survey, comprising quasars observed betwe…
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…
H Time Delays of AGNs from the Zwicky Transcient Facility Broadband Photometry
Qinchun Ma, Yuhan Wen, Xue-Bing Wu +2
In our previous work on broadband photometric reverberation mapping (PRM), we proposed the ICCF-Cut process to obtain the time lags of H emission line from two broadband lightc…
MsMemoryGAN: A Multi-scale Memory GAN for Palm-vein Adversarial Purification
Huafeng Qin, Yuming Fu, Huiyan Zhang +4
Deep neural networks have recently achieved promising performance in the vein recognition task and have shown an increasing application trend, however, they are prone to adversaria…
AGVBench: A Reliability-Oriented Benchmark of Data Augmentation for Vein Recognition
Haiyang Li, Yuming Fu, Qun Song +6
Vein recognition is a secure biometric technology often constrained by limited annotated data and imaging variations. While data augmentation mitigates this, strategies designed fo…
Quadratic rational maps with a -cycle of Siegel disks
Yuming Fu, Fei Yang, Gaofei Zhang
For the family of quadratic rational functions having a -cycle of bounded type Siegel disks, we prove that each of the boundaries of these Siegel disks contains at most one crit…
X-ray variability of SDSS J000532.84+200717.4: from a normal state to an X-weak state
Xiaohui Yang, Yanli Ai, Liming Dou +8
We present a multi-epoch study of the extreme X-ray variability of the type~1 quasar SDSS~J000532.84+200717.4 using archival observations from \textit{XMM-Newton}, \textit{Swift}/X…
Mating Siegel and Thurston quadratic polynomials
Yuming Fu, Yanhua Zhang
We prove that a quadratic polynomial with a bounded type Siegel disk and a quadratic post-critically finite polynomial are always mateable.
Finding Quasars behind the Galactic Plane. IV. Candidate Selection from Chandra with Random Forest
Xu Zhang, Yanli Ai, Yanxia Zhang +8
Quasar samples remain severely incomplete at low Galactic latitudes because of strong extinction and source confusion. We conduct a systematic search for quasars behind the Galacti…
Physiological Prior-Driven Label Enhancement for Cross-Subject EEG Emotion Recognition
Hongyu Zhu, Lin Chen, Yuming Fu +2
Electroencephalography (EEG)-based emotion recognition captures affective neural signals with high temporal precision, but cross-subject variability and label noise remain critical…
A Pilot Study for the CSST Slitless Spectroscopic Quasar Survey Based on Mock Data
Yuxuan Pang, Xue-Bing Wu, Yuming Fu +4
The wide survey of the Chinese Space Station Telescope (CSST) will observe a large field of 17,500 . The GU, GV, and GI grism observations of CSST will cover a wavele…
AllBRICQS: The Discovery of Luminous Quasars in the Northern Hemisphere
Yunyi Choi, Yuming Fu, Myungshin Im +16
We present the second catalog of bright quasars from the All-sky BRIght, Complete Quasar Survey (AllBRICQS), focusing on spectroscopically observed quasars in the Northern Hemisphe…
Neural Architecture Search based Global-local Vision Mamba for Palm-Vein Recognition
Huafeng Qin, Yuming Fu, Jing Chen +3
Due to the advantages such as high security, high privacy, and liveness recognition, vein recognition has been received more and more attention in past years. Recently, deep learni…
Exploring the Tension: Insights from the CatNorth 1.5-Million Quasar Candidates
Jin Qin, Xue-Bing Wu, Yuming Fu +4
The parameter , a key probe of cosmic structure growth, exhibits a persistent tension between high-redshift measurements from cosmic microwave background (CMB) aniso…