6 citations · 6 across the 7 of their papers we have counts for
7 papers
22 Newly Identified Repeating Changing-look AGNs and Evidence for Extreme Broad-line Region Breathing
Litao Zhu, Zhongxiang Wang, Alok C. Gupta +5
Changing-look active galactic nuclei (CL AGNs) show the appearance or disappearance of broad emission lines on timescales of years. Among them, the repeating CL (RCL) AGNs may prov…
Extreme color-magnitude variability: connection to changing-look AGNs
Litao Zhu, Zhongxiang Wang, Alok C. Gupta +5
Context. Changing-look active galactic nuclei (CL-AGNs) challenge the unified model of AGNs and offer key insights into the physics of the accretion processes of super-massive blac…
A Disk-Originated 329-day Quasi-Periodic Oscillation in the Seyfert 1 Galaxy J1626+5120
Litao Zhu, Zhongxiang Wang, Dong Zheng +2
The Seyfert 1 galaxy J1626+5120 is estimated to host a black hole (BH) accreting at Eddington ratio . Its long-term multi-band…
AT2022sxl: A Candidate Repeating Tidal Disruption Event in Possible Association with Two High-Energy Neutrino Events
Shunhao Ji, Zhongxiang Wang, Litao Zhu +2
We report a candidate repeating tidal disruption event (TDE), AT2022sxl, found from large-field optical survey data. Two flares with a separation time of 7.2\,yr between the…
Testing Colour-magnitude Pattern as A Method in the Search for Changing-Look AGNs
Li-tao Zhu, Zhongxiang Wang, P. U. Devanand +6
We develop a simple method to search for changing-look (CL) active galactic nucleus (AGN) candidates, and conduct a test run. In this method, optical variations of AGNs are monitor…
Four Changing-Look Active Galactic Nuclei Found From Optical Variations
Litao Zhu, Jie Li, Zhongxiang Wang +1
We report the finding of four changing-look (CL) active galactic nuclei (AGN). We selected these sources due to their potential as interesting targets when considering their relati…