IFU observations of the inner 200 pc of NGC 4546: gas rotation, non-circular motions and ionised outflows
arXiv:2210.10070 · doi:10.1093/mnras/stac3041
Abstract
We present a detailed analysis of the ionised gas distribution and kinematics in the inner ~ 200 pc of NGC 4546, host of a Low Luminosity Active Galactic Nucleus (LLAGN). Using GMOS-IFU observations, with a spectral coverage of 4736-6806 A and an angular resolution of 0.7 arcsec, we confirm that the nuclear emission is consistent with photoionisation by an AGN, while the gas in the circumnuclear region may be ionised by hot low-mass evolved stars. The gas kinematics in the central region of NGC 4546 presents three components: (i) a disc with major axis oriented along a position angle of 43deg +/- 3deg, counter rotating relative to the stellar disc; (ii) non-circular motions, evidenced by residual velocities of up to 60 km/s, likely associated to a previous capture of a dwarf satellite by NGC 4546; and (iii) nuclear outflows in ionised gas, identified as a broad component (sigma ~ 320 km/s) in the line profiles, with a mass outflow rate of dMout = 0.3 +/- 0.1 Msun/yr and a total mass of Mout = (9.2 +/- 0.8)E3 Msun in ionised gas, corresponding to less than 3 per cent of the total mass of ionised gas in the inner 200 pc of NGC 4546. The kinetic efficiency of the outflow is roughly 0.1 per cent, which is smaller than the outflow coupling efficiencies predicted by theoretical studies to AGN feedback become efficient in suppressing star formation in the host galaxy.
13 pages, accepted for publication in MNRAS
References in corpus (26)
- The Host Galaxies and Classification of Active Galactic Nuclei
- Improving the full spectrum fitting method: accurate convolution with Gauss-Hermite functions
- PyNeb: a new tool for analyzing emission lines. I. Code description and validation of results
- Kiloparsec-scale outflows are prevalent among luminous AGN: outflows and feedback in the context of the overall AGN population
- Fueling AGN II: Spatially Resolved Molecular Inflows and Outflows
- Discovering AGN-driven winds through their infrared emission: II. Mass outflow rate and energetics
- AGNIFS survey of local AGN: GMOS-IFU data and outflows in 30 sources
- Chandra Survey of Nearby Galaxies: The Catalog
- Determining star-formation rates in Active Galactic Nuclei hosts via stellar population synthesis
- Integral field unit spectroscopy of 10 early type galactic nuclei: I - Principal component analysis Tomography and nuclear activity
- Gemini NIFS survey of feeding and feedback processes in nearby Active Galaxies: I - Stellar kinematics
- Ionized and hot molecular outflows in the inner 500 pc of NGC1275
- A treatment procedure for GMOS/IFU data cubes: application to NGC 2835
- Outflows of hot molecular gas in ultra-luminous infra-red galaxies mapped with VLT-SINFONI
- A Minor Merger Caught In The Act Of Fueling The AGN In Mrk 509
- A close look at the dwarf AGN of NGC 4395: optical and near-IR integral field spectroscopy
- IFU spectroscopy of 10 early-type galactic nuclei - III. Properties of the circumnuclear gas emission
- IFU spectroscopy of 10 early type galactic nuclei: II - Nuclear emission line properties
- Tracing the origin of the AGN fuelling reservoir in MCG--6-30-15
- Integral Field Spectroscopy of the inner kpc of the elliptical galaxy NGC 5044
- External gas accretion provides a fresh gas supply to the active S0 galaxy NGC 5077
- The complex multi-component outflow of the Seyfert galaxy NGC 7130
- IFU spectroscopy of 10 early-type galactic nuclei - IV. Properties of the circumnuclear stellar kinematics
- The OH Megamaser galaxy IRAS11506-3851: an AGN and starformation revealed by multiwavelength observations
- Field/Isolated lenticular galaxies with high values: the case of NGC 4546 and its globular cluster system
- Measuring the mass of the supermassive black hole of the lenticular galaxy NGC 4546