The nuclear region of NGC 613 -- II. Kinematics and stellar archaeology

Abstract

In this work, we continue the study of the central region of NGC 613 by da Silva et al. (2020), by analysing the stellar and gas kinematics and the stellar archaeology in optical and near-infrared data cubes. The high spatial resolution of the Gemini Multi-Object Spectrograph (GMOS) data cube allowed the detection, using spectral synthesis methods, of an inner circumnuclear ring, with a radius of $\sim$ 1 arcsec, composed of $\sim$ 10${}^9$-yr stellar populations. Such a ring is located between the nucleus and the circumnuclear ring composed by H II regions detected in previous works. Besides that, there is a stellar rotation around the nucleus and the rings follow the same direction of rotation with different velocities. The intensity-weighted average stellar velocity dispersion at the centre is 92 $\pm$ 3 km s${}^{-1}$. Three distinct gas outflow components were detected. The direction of the outflow observed with the H $\alpha$ emission line is compatible with the direction of the previously observed radio jet. The direction of one of the outflows detected in the [O III]$\lambda$5007 emission coincides with the axis of the ionization cone. There is no difference regarding the stellar populations and the stellar kinematics along the double stellar emission, probably separated by a dust lane as mentioned in Paper I, confirming that they are part of the same structure.

17 pages, 17 figures

References in corpus (10)

• Observational Constraints on the Feeding of Supermassive Black Holes
• A SINFONI view of Galaxy Centers: Morphology and Kinematics of five Nuclear Star Formation Rings
• A Connection between Star Formation in Nuclear Rings and their Host Galaxies
• Dissecting Galaxies: Separating Star Formation, Shock Excitation and AGN Activity in the Central Region of NGC 613
• A treatment procedure for VLT/SINFONI data cubes: application to NGC 5643
• Are (pseudo)bulges in isolated galaxies actually primordial relics?
• A treatment procedure for GMOS/IFU data cubes: application to NGC 2835
• The continuous rise of bulges out of galactic disks
• The nuclear region of NGC 613. I -- Multiwavelength analysis
• A SINFONI view of circum-nuclear star-forming rings in spiral galaxies

Cited by in corpus (2)

• The DIVING${}^{3D}$ Survey -- Deep IFS View of Nuclei of Galaxies -- I. Definition and Sample Presentation
• Mapping the Active Galactic Nucleus Effects on the Stellar and Gas Properties of NGC 5806