Host Galaxy Properties of Changing-look AGN Revealed in the MaNGA Survey
Abstract
Changing-look Active Galactic Nuclei (CL-AGNs) are a subset of AGNs in which the broad Balmer emission lines appear or disappear within a few years. We use the Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) survey to identify five CL-AGNs. The 2-D photometric and kinematic maps reveal common features as well as some unusual properties of CL-AGN hosts as compared to the AGN hosts in general. All MaNGA CL-AGNs reside in the star-forming main sequence, similar to MaNGA non-changing-look AGNs (NCL-AGNs). The 80\% 16\% of our CL-AGNs do possess pseudo-bulge features, and follow the overall NCL-AGNs MBH-σ* relationship. The kinematic measurements indicate that they have similar distributions in the plane of angular momentum versus galaxy ellipticity. MaNGA CL-AGNs however show a higher, but not statistically significant (20\% 16\%) fraction of counter-rotating features compared to that (1.84\% 0.61\%) in general star-formation population. In addition, MaNGA CL-AGNs favor more face-on (axis ratio > 0.7) than that of Type I NCL-AGNs. These results suggest that host galaxies could play a role in the CL-AGN phenomenon.