Host galaxy properties of changing-look AGNs revealed in the MaNGA survey. Issue 3 (29th August 2020)

• Record Type: Journal Article
• Authors: Yu, Xiaoling; Shi, Yong; Chen, Yanmei; Chen, Jianhang; Li, Songlin; Bing, Longji; Ge, Junqiang; Riffel, Rogemar A; Riffel, Rogério
• Is Part Of: Monthly notices of the Royal Astronomical Society. Volume 498:Issue 3(2020)
• Page Start: 3985
• Page End: 3994
• Publication Date: 2020-08-29
• Subjects: galaxies: active -- galaxies: evolution -- galaxies: kinematics and dynamics -- galaxies: nuclei -- galaxies: Seyfert; Astronomy -- Periodicals; Periodicals; 520.5
• DOI: 10.1093/mnras/staa2627
• Languages: English
• ISSNs: 0035-8711

Abstract

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 2D 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 $80 \pm 16{{\ \rm per\ cent}}$ of our CL-AGNs do possess pseudo-bulge features, and follow the overall NCL-AGN M BH –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 ($20 \pm 16{{\ \rm per\ cent}}$ ) fraction of counter-rotating features compared to that ($1.84 \pm 0.61{{\ \rm per\ cent}}$ ) in general star formation population. In addition, MaNGA CL-AGNs favour more face-on (axial 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.