The first 62 AGN observed with SDSS-IV MaNGA - I: their characterization and definition of a control sample

Abstract

We report the characterization of the first $62$ MaNGA Active Galactic Nuclei (AGN) hosts in the Fifth Product Launch (MPL-5) and the definition of a control sample of non-active galaxies. This control sample - comprising two galaxies for each AGN - was selected in order to match the AGN hosts in terms of stellar mass, redshift, visual morphology and inclination. The stellar masses are in the range $9.4<\log (M/M_{\odot })<11.5$, and most objects have redshifts $\le 0.08$. The AGN sample is mostly comprised of low-luminosity AGN, with only 17 nuclei with $L([OIII]\lambda 5007)\ge 3.8\times 10^{40}$ erg s${}^{-1}$ (that we call "strong AGN"). The stellar population of the control sample galaxies within the inner $1$-$3$ kpc is dominated by the old ($\sim$ $4$ - $13$ Gyr) age component, with a small contribution of intermediate age ($\sim 640$-$940$ Myr) and young stars ($\le 40$ Myr) to the total light at $5700\mathring{A}$. While the weaker AGN show a similar age distribution to that of the control galaxies, the strong AGN show an increased contribution of younger stars and a decreased contribution of older stars. Examining the relationship between the AGN stellar population properties and $L([OIII])$, we find that with increasing $L([OIII])$, the AGN exhibit a decreasing contribution from the oldest ($>4$ Gyr) stellar population relative to control galaxies, but have an increasing contribution from the younger components with ages $\sim 40$ Myr. We also find a correlation of the mean age differences (AGN - control) with $L([OIII])$, in the sense that more luminous AGN are younger than the control objects, while the low-luminosity AGN seem to be older. These results support a connection between the growth of the galaxy bulge via formation of new stars and the growth of the Supermassive Black Hole via matter accretion in the AGN phase.

26 pages, 11 figures. Submitted to MNRAS

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• Chemical abundances of Seyfert 2 AGNs $-$II. N2 metallicity calibration based on SDSS
• The spatial extension of extended narrow line regions in MaNGA AGN
• Milky Way Analogues in MaNGA: Multi-Parameter Homogeneity and Comparison to the Milky Way
• The first 62 AGN observed with SDSS-IV MaNGA -- III: stellar and gas kinematics
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• Larger ${\lambda }_R$ in the disc of isolated active spiral galaxies than in their non-active twins
• Spotting the differences between active and non-active twin galaxies on kpc-scales. A pilot study
• A Systematic Analysis of Stellar Populations in the Host Galaxies of SDSS Type I QSOs