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…