A closer look at NGC 7314 nuclear region: a multiwavelength analysis of the Seyfert nucleus and its surroundings

Abstract

The central regions of galaxies harbouring active galactic nuclei (AGNs) can be quite complex, especially at high activity, presenting, besides variability, a variety of phenomena related, e.g. to ionization/excitation mechanisms. A detailed study is necessary in order to understand better those objects. For that reason, we performed a multiwavelength analysis of the nuclear region of the nearby Seyfert galaxy NGC 7314, using an optical data cube obtained with the Integral Field Unit from the Gemini Multi-Object Spectrograph, together with Hubble Space Telescope images, X-ray data from the XMM-Newton and the Nuclear Spectroscopic Telescope Array and radio data from Atacama Large Millimeter/Submillimeter Array. The goals were to study the nuclear and circumnuclear emission, the emission of the AGN and the gas kinematics. The optical spectrum shows the emission of a Seyfert nucleus, with broad components in the H$\alpha$ and H$\beta$ emission lines, characterising a type 1 AGN, with a spectrum rich in coronal emission lines. The spatial morphology of the [OIII]$\lambda$5007 suggests the presence of an ionization cone, west of the nucleus, meanwhile the east cone seems to be obscured by dust. An extended [FeVII]$\lambda$6087 emission was also detected, which could be possibly explained by a scenario involving photoionization+shocks mechanisms. X-rays analyses showed that there are variations in the flux; however, we did not detect any variations in the column density along the line of sight. Its variability may be a consequence of changes in the AGN accretion rate.

20 pages, 16 figures, 7 tables

References in corpus (22)

• The Co-Evolution of Galaxies and Supermassive Black Holes: Insights from Surveys of the Contemporary Universe
• The MAPPINGS III Library of Fast Radiative Shock Models
• AGN Dusty Tori: I. Handling of Clumpy Media
• The Galaxy Activity, Torus and Outflow Survey (GATOS) I. ALMA images of dusty molecular tori in Seyfert galaxies
• Outflows of very ionized gas in the center of Seyfert galaxies: kinematics and physical conditions
• BAT AGN Spectroscopic Survey - IV: Near-Infrared Coronal Lines, Hidden Broad Lines, and Correlation with Hard X-ray Emission
• The central parsec of NGC 3783: a rotating broad emission line region, asymmetric hot dust structure, and compact coronal line region
• Variability of Active Galactic Nuclei from the Optical to X-ray Regions
• The variable and non-variable X-ray absorbers in Compton-thin type-II Active Galactic Nuclei
• Probing the Physics of Narrow Line Regions in Active Galaxies III: Accretion and Cocoon Shocks in the LINER NGC1052
• NGC 1566: analysis of the nuclear region from optical and near-infrared Integral Field Unit spectroscopy
• An off-centered active galactic nucleus in NGC 3115
• A treatment procedure for GMOS/IFU data cubes: application to NGC 2835
• A novel black-hole mass scaling relation based on coronal gas, and its dependence with the accretion disc
• A 700-pc extended coronal gas emission in the Circinus galaxy
• The ionised gas outflow in the Circinus galaxy: kinematics and physical conditions
• Collimation and scattering of the active galactic nucleus emission in the Sombrero galaxy
• The nuclear region of NGC 613. I -- Multiwavelength analysis
• The DIVING${}^{3D}$ Survey -- Deep IFS View of Nuclei of Galaxies -- I. Definition and Sample Presentation
• Double nuclei in NGC 908 and NGC 1187
• The nuclear environment of NGC 2442: a Compton-thick low-luminosity AGN
• The highly obscured Seyfert 2 nucleus in NGC 1448 observed with MUSE

Cited by in corpus (1)

• X-ray and CO-Derived Column Densities in AGN: A Study of Obscuration Properties in CTAGN and Non-CTAGN