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
Showing astro-ph.GAShow all

11 papers · 1 filter

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.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.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.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…