paper

The first 62 AGN observed with SDSS-IV MaNGA - IV: gas excitation and star-formation rate distributions

arXiv:1904.06416 · doi:10.1093/mnras/stz1083

Abstract

We present maps of the ionized gas flux distributions, excitation, star-formation rate SFR, surface mass density , and obtain total values of SFR and ionized gas masses {\it M} for 62 Active Galactic Nuclei (AGN) observed with SDSS-IV MaNGA and compare them with those of a control sample of 112 non-active galaxies. The most luminous AGN -- with $L(\rm{[OIII]}λ5007) \ge 3.8\times 10^{40}\,\mbox{erg}\,\mbox{s}^{-1}$, and those hosted by earlier-type galaxies are dominated by Seyfert excitation within 0.2 effective radius from the nucleus, surrounded by LINER excitation or transition regions, while the less luminous and hosted by later-type galaxies show equally frequent LINER and Seyfert excitation within . The extent of the region ionized by the AGN follows the relation -- as in the case of the Broad-Line Region. The SFR distribution over the region ionized by hot stars is similar for AGN and controls, while the integrated SFR -- in the range \,M\,yr is also similar for the late-type sub-sample, but higher in the AGN for 75\% of the early-type sub-sample. We thus conclude that there is no signature of AGN quenching star formation in the body of the galaxy in our sample. We also find that 66\% of the AGN have higher ionized gas masses than the controls -- in the range 10\,M -- while 75\% of the AGN have higher within than the control galaxies.

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