Ionised gas kinematics in MaNGA AGN

Abstract

Context. Feedback from active galactic nuclei (AGNs) in general seems to play an important role in the evolution of galaxies, although the impact of AGN winds on their host galaxies is still unknown in the absence of a detailed analysis. Aims. We aim to analyse the kinematics of a sample of 170 AGN host galaxies as compared to those of a matched control sample of non-active galaxies from the MaNGA survey in order to characterise and estimate the extents of the narrow-line region (NLR) and of the kinematically disturbed region (KDR) by the AGN. Methods. We defined the observed NLR radius (rNLR, o) as the farthest distance from the nucleus within which both [O III]/Hβ and [N II]/Hα ratios fall in the AGN region of the BPT diagram, and the Hα equivalent width was required to be larger than 3.0 Å. The extent of the KDR (rKDR, o) is defined as the distance from the nucleus within which the AGN host galaxies show a more disturbed gas kinematics than the control galaxies. Results. The AGN [O III]λ5007 luminosity ranges from 1039 to 1041 erg s−1, and the kinematics derived from the [O III] line profiles reveal that, on average, the most luminous AGNs (L[O III] > 3.8 × 1040 erg s−1) possess higher residual differences between the gaseous and stellar velocities and velocitie dispersions than their control galaxies in all the radial bins. Spatially resolved NLRs and KDRs were found in 55 and 46 AGN host galaxies, with corrected radii 0.2 < rKDR, c < 2.3 kpc and 0.4 < rNLR, c < 10.1 kpc and a relation between the two given by log rKDR, c = (0.53 ± 0.12) log rNLR, c + (1.07 ± 0.22), respectively. On average, the extension of the KDR corresponds to about 30% of that of the NLR. Assuming that the KDR is due to an AGN outflow, we have estimated ionised gas mass outflow rates that range between 10−5 and ∼1 M⊙ yr−1, and kinetic powers that range from 1034 to 1040 erg s−1. Conclusions. Comparing the power of the AGN ionised outflows with the AGN luminosities, they are always below the 0.05 LAGN model threshold for having an important feedback effect on their respective host galaxies. The mass outflow rates (and power) of our AGN sample correlate with their luminosities, populating the lowest AGN luminosity range of the correlations previously found for more powerful sources.

Quantifying Feedback from Narrow Line Region Outflows in Nearby Active Galaxies. IV. The Effects of Different Density Estimates on the Ionized Gas Masses and Outflow Rates

“…Significant effort is being devoted to understanding the physics of AGN-driven outflows and measuring their energetic impact (e.g., Fischer et al 2018;Baron & Netzer 2019a, 2019bFörster Schreiber et al 2019;Mingozzi et al 2019;Davies et al 2020b;Wylezalek et al 2020;Avery et al 2021;Fluetsch et al 2021;Lamperti et al 2021;Luo et al 2021;Negus et al 2021;Ruschel-Dutra et al 2021;Speranza et al 2021;Vayner et al 2021;Bianchin et al 2022;Deconto-Machado et al 2022;Kakkad et al 2022). However, outflows are inhomogeneous, with a large range of densities and geometries, such that the derived gas masses and outflow rates depend strongly on how the gas densities are estimated.…”

WISDOM project – XI. Star formation efficiency in the bulge of the AGN-host Galaxy NGC 3169 with SITELLE and ALMA

“…As illustrated in many works (e.g. Sun et al 2020 ;Deconto-Machado et al 2022 ), in the central kpc in radius, AGN-host galaxies can have velocity dispersions o v er 100 km s −1 higher than those of other galaxies with similar morphologies.…”

Active galactic nuclei signatures in Red Geyser galaxies from Gemini GMOS-IFU observations

“…Rembold et al ( 2017) selected an AGN sample from the MaNGA MPL-5 using the diagnostic diagrams described abo v e, which was updated with data from the MPL-8 (the same used here) in Riffel et al ( 2021 ) andDeconto-Machado et al ( 2022 ). This selection is based on the nuclear spectra of the SDSS-III using emission-line fluxes from Thomas et al ( 2013 ).…”