AGN feeding along a one-armed spiral in NGC 4593: A study using ALMA CO(2-1) observations
Journal article, 2024
Context. We investigate active galactic nuclei (AGN) feeding through the molecular gas (CO(2-1) emission) properties of the local Seyfert 1 galaxy NGC 4593, using Atacama Large Millimeter Array (ALMA) observations and other multi-wavelength data. Aims. Our study aims to understand the interplay between the AGN and the interstellar medium (ISM) in this galaxy, examining the role of the AGN in steering gas dynamics within its host galaxy, evaluating the energy injected into the ISM, and determining whether gas is inflowing or outflowing from the galaxy. Methods. After reducing the ALMA CO(2-1) images, we employed two models, 3D-BAROLO and DISCFIT, to construct a disc model and fit its emission to the ALMA data. Additionally, we used photometric data to build a spectral energy distribution (SED) and apply the CIGALE code to derive key physical properties of the AGN and its host. Results. Our analysis reveals a complex interplay within NGC 4593, including a clear rotational pattern, the influence of a non-axisymmetric bar potential, and a central molecular zone (CMZ)-like ring. We observe an outflow of CO(2-1) gas along the minor axis, at a distance of ∼220 pc from the nucleus. The total molecular gas mass is estimated to be 1-5 × 108M⊙, with non-circular motions contributing 10%. Our SED analysis indicates an AGN fraction of 0.88 and a star formation rate (SFR) of 0.42 M⊙ yr-1. Conclusions. These findings highlight the complex dynamics in the centre of NGC 4593, which are significantly influenced by the presence of the AGN. The overall physical properties of this system suggest that the AGN has a substantial impact on the evolution of NGC 4593.
Galaxies: evolution
ISM: jets and outflows
Galaxies: active
Galaxies: kinematics and dynamics
Submillimeter: ISM
Galaxies: individual: NGC 4593
Author
K. Kianfar
Instituto Tecnológico de Aeronáutica (ITA)
European Southern Observatory (ESO)
P. Andreani
European Southern Observatory (ESO)
J. A. Fernández-Ontiveros
CEFCA
F. Combes
Paris Observatory
L. Spinoglio
Istituto nazionale di astrofisica (INAF)
E. Hatziminaoglou
University of La Laguna
European Southern Observatory (ESO)
Instituto de Astrofísica de Canarias
C. Ricci
Beijing University of Technology
Diego Portales University
Asnakew Bewketu Belete
Chalmers, Space, Earth and Environment, Astronomy and Plasmaphysics
M. Imanishi
National Astronomical Observatory of Japan
The Graduate University for Advanced Studies (SOKENDAI)
M. Pereira-Santaella
Spanish National Research Council (CSIC)
R. Slater
University of Talca
M. Malheiro
Instituto Tecnológico de Aeronáutica (ITA)
Astronomy and Astrophysics
0004-6361 (ISSN) 1432-0746 (eISSN)
Vol. 691 A118Subject Categories (SSIF 2025)
Atom and Molecular Physics and Optics
Astronomy, Astrophysics, and Cosmology
DOI
10.1051/0004-6361/202451185