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Lookup NU author(s): Dr Chris HarrisonORCiD
This is the authors' accepted manuscript of an article that has been published in its final definitive form by Oxford University Press, 2022.
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© 2021 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society. We study the gas distribution and kinematics of the inner kpc of six moderately luminous (43.43 ≤ log Lbol ≤ 44.83) nearby (0.004 ≤ z ≤ 0.014) Seyfert galaxies observed with the Near-infrared Integral Field Spectrograph (NIFS) in the J (1.25,mum) and K (2.2,mum) bands. We analyse the most intense emission lines detected on these spectral wavebands: [Fe ii] 1.2570, mum and Paβ, which trace the ionized gas in the partially and fully ionized regions, and mathrm{ H}2 2.1218, mum, which traces the hot (∼2000 K) molecular gas. The dominant kinematic component is rotation in the disc of the galaxies, except for the ionized gas in NGC 5899 that shows only weak signatures of a disc component. We find ionized gas outflow in four galaxies, while signatures of H2 outflows are seen in three galaxies. The ionized gas outflows display velocities of a few hundred km s-1, and their mass outflow rates are in the range 0.005-12.49 Mpdbl yr-1. Their kinetic powers correspond to 0.005-0.7 per cent of the active galactic nuclei (AGN) bolometric luminosities. Besides rotation and outflows signatures in some cases, the H2 kinematics also reveals inflows in three galaxies. The inflow velocities are 50-80 km s-1 and the mass inflow rates are in the range 1-9 × 10-4 Mpdbl yr-1 for hot molecular gas. These inflows might be only the hot skin of the total inflowing gas, which is expected to be dominated by colder gas. The mass inflow rates are lower than the current accretion rates to the AGN, and the ionized outflows are apparently disturbing the gas in the inner kpc.
Author(s): Bianchin M, Riffel RA, Storchi-Bergmann T, Riffel R, Ruschel-Dutra D, Harrison CM, Dahmer-Hahn LG, Mainieri V, Schonell AJ, Dametto NZ
Publication type: Article
Publication status: Published
Journal: Monthly Notices of the Royal Astronomical Society
Year: 2022
Volume: 510
Issue: 1
Pages: 639-657
Print publication date: 01/02/2022
Online publication date: 01/12/2021
Acceptance date: 26/11/2021
Date deposited: 01/07/2022
ISSN (print): 0035-8711
ISSN (electronic): 1365-2966
Publisher: Oxford University Press
URL: https://doi.org/10.1093/mnras/stab3468
DOI: 10.1093/mnras/stab3468
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