activity
20172026
most citedDiscovery of 21 New Changing-look AGNs in Northern Sky

220 citations · 337 across the 19 of their papers we have counts for

collaborators

19 papers

astro-ph.HE2026

X-rays breaking out of pre-explosion ejecta mark a supernova's first light

Weimin Yuan, Qiu-Ju Huang, Jin-Ping Zhu +130

Massive stars die as core-collapse supernovae, whose optical light emerges days after the implosion. Theory predicts that the initial collapse-driven shock, upon breaking through t…

astro-ph.HE2026

Multiwavelength Analysis of the Einstein Probe X-ray Transient EP240305a

Ruican Ma, Ye Li, Lian Tao +32

We report multiwavelength observations of EP240305a, an uncatalogued X-ray transient detected by the Einstein Probe on March 5, 2024. The source exhibits distinct characteristics a…

astro-ph.HE2026

Synchrotron Self-Absorption Spectral Modeling Reveals a Magnetically Driven Shock-in-Jet Scenario in Blazar 1156+295

Wancheng Xu, Lang Cui, Tao An +6

Unveiling the launching and driving mechanisms of powerful jets in active galactic nuclei (AGNs) is crucial for understanding the co-evolution of supermassive black holes (SMBHs) a…

astro-ph.HE2025

A pilot VLBI study of the SQUAB quasar sample featuring multiple Gaia detections

Yingkang Zhang, Tao An, Xiang Ji +5

Our previous work identified a class of SDSS quasars exhibiting multiple Gaia detections, classifying them as candidates for various astrophysical systems such as quasar-star pairs…

astro-ph.GA2025

Discovery of giant bubbles in the hot gaseous halo of the massive disk galaxy NGC 6286

Lin He, Zhiyuan Li, Zongnan Li +3

Based on archival Chandra X-ray observation, optical integral-field spectroscopic data and radio interferometric data, we report the discovery of a pair of giant bubbles (with a pr…

astro-ph.HE2025

A Deep VLA Search for a Persistent Radio Counterpart to the One-off FRB 20250316A

Tao An, Ailing Wang, Yu-Chen Huang +4

Fast Radio Burst (FRB) 20250316A, detected by CHIME on 2025 March 16 with a fluence of and a dispersion measure of , r…

astro-ph.GA2025

A Jetted Wandering Massive Black Hole Candidate in a Dwarf Galaxy

Yuanqi Liu, Tao An, Mar Mezcua +4

Wandering massive black holes (MBHs) are thought to form through gravitational recoil or galaxy mergers, but observational confirmation of their displacement in dwarf galaxies, cri…

astro-ph.IM2025★ 6 cited

Lunar Orbital VLBI Experiment: motivation, scientific purposes and status

Xiaoyu Hong, Weiren Wu, Qinghui Liu +47

The Lunar Orbital VLBI Experiment (LOVEX) is a scientific component of the Chinese Lunar Exploration Project (CLEP) Chang'E-7. The spaceborne component of LOVEX is implemented onbo…

astro-ph.HE2025

High-redshift quasars at -- III. Parsec-scale jet properties from VLBI observations

Shaoguang Guo, Tao An, Yuanqi Liu +5

High redshift active galactic nuclei (AGN) provide key insights into early supermassive black hole growth and cosmic evolution. This study investigates the parsec-scale properties…

astro-ph.GA2025

First Detection of Radio Emission from the Intermediate Mass Black Hole in POX 52: Deep Multi-Band Observations with ATCA and VLA

Qi Yuan, Hengxiao Guo, Minfeng Gu +14

We present the first multi-band centimeter detection of POX 52, a nearby dwarf galaxy believed to habor a robust intermediate mass black hole (IMBH). We conducted the deep observat…

astro-ph.GA2024

The RAdio Galaxy Environment Reference Survey (RAGERS): Evidence of an anisotropic distribution of submillimeter galaxies in the 4C 23.56 protocluster at z=2.48

Dazhi Zhou, Thomas R. Greve, Bitten Gullberg +41

High-redshift radio(-loud) galaxies (HRGs) are massive galaxies with powerful radio-loud active galactic nuclei (AGNs) and serve as beacons for protocluster identification. Howe…

astro-ph.GA2024★ 2 cited

VLBI observations of the high-redshift X-ray bright blazar SRGE J170245.3+130104

Yuanqi Liu, Tao An, Shaoguang Guo +8

Aims. The X-ray luminous and radio-loud AGN SRGE J170245.3+130104 discovered at z 5.5 provides unique chances to probe the SMBH growth and evolution with powerful jets in th…

astro-ph.GA2024

Diverse molecular gas excitations in quasar host galaxies at z \sim 6

Jianan Li, Ran Wang, Antonio Pensabene +17

We present observations using the NOrthern Extended Millimetre Array (NOEMA) of CO and emission lines, and the underlying dust continuum in two quasars at ,…

astro-ph.HE2022★ 6 cited

Is the X-ray bright z = 5.5 quasar SRGE J170245.3+130104 a blazar?

Tao An, Ailing Wang, Yuanqi Liu +11

Jets may have contributed to promoting the growth of seed black holes in the early Universe, and thus observations of radio-loud high-redshift quasars are crucial to understanding…

astro-ph.GA2022

VLBA reveals the absence of a compact radio core in the radio intermediate quasar J2242+0334 at z =5.9

Yuanqi Liu, Ran Wang, Emmanuel Momjian +6

High-resolution imaging is crucial for exploring the origin and mechanism of radio emission in quasars, especially at high redshifts. We present 1.5 GHz Very Long Baseline Array (V…

astro-ph.GA2022★ 4 cited

Exploring the radio spectral energy distribution of the ultraluminous radio-quiet quasar SDSS J0100+2802 at redshift 6.3

Yuanqi Liu, Ran Wang, Emmanuel Momjian +13

We report deep Karl G. Jansky Very Large Array (VLA) observations of the optically ultraluminous and radio-quiet quasar SDSS J010013.02 + 280225.8 (hereafter J0100+2802) at redshif…

astro-ph.GA2020★ 49 cited

Constraining the quasar radio-loud fraction at with deep radio observations

Yuanqi Liu, Ran Wang, Emmanuel Momjian +8

We carry out a series of deep Karl G. Jansky Very Large Array (VLA) S-band observations of a sample of 21 quasars at . The new observations expand the searches of radio con…

astro-ph.GA2018★ 50 cited

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…

astro-ph.GA2017★ 220 cited

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…