Dust beyond the torus: Revealing the mid-infrared heart of local Seyfert ESO 428-G14 with JWST/MIRI

Abstract

Polar dust has been discovered in a number of local Active Galactic Nuclei (AGN), with radiation-driven torus models predicting a wind to be its main driver. However, little is known about its characteristics, spatial extent, or connection to the larger scale outflows. We present the first JWST/MIRI study aimed at imaging polar dust by zooming onto the centre of ESO 428-G14, part of the Galaxy Activity, Torus, and Outflow Survey (GATOS) survey of local AGN. We detect extended mid-infrared (MIR) emission within 200 pc from the nucleus. This polar structure is co-linear with a radio jet and lies perpendicular to a molecular gas lane that feeds and obscures the nucleus. Its morphology bears a striking resemblance to that of gas ionised by the AGN in the narrow-line region. We demonstrate that part of this spatial correspondence is due to contamination within the JWST filter bands from strong emission lines. Correcting for the contamination, we find the morphology of the dust continuum to be more compact, though still clearly extended out to ~ 100 pc. We estimate the emitting dust has a temperature of ~ 120 K. Using simple models, we find that the heating of small dust grains by the radiation from the central AGN and/or radiative jet-induced shocks is responsible for the extended MIR emission. Radiation-driven dusty winds from the torus is unlikely to be important. This has important implications for scales to which AGN winds can carry dust and dense gas out into their host galaxies.

17 pages, 8 figures, 2 tables. Published in MNRAS

References in corpus (34)

• Array Programming with NumPy
• The Gaia mission
• Gaia Data Release 3: Summary of the content and survey properties
• AGN Dusty Tori: I. Handling of Clumpy Media
• The James Webb Space Telescope Mission
• Universal bolometric corrections for AGN over 7 luminosity decades
• The close environments of accreting massive black holes are shaped by radiative feedback
• Resolving the complex structure of the dust torus in the active nucleus of the Circinus galaxy
• A method to remove residual OH emission from near infrared spectra
• The Infrared Nuclear Emission of Seyfert Galaxies on Parsec Scales: Testing the Clumpy Torus models
• The effect of radiation pressure on dusty absorbing gas around AGN
• ALMA images the many faces of the NGC1068 torus and its surroundings
• The Galaxy Activity, Torus and Outflow Survey (GATOS) I. ALMA images of dusty molecular tori in Seyfert galaxies
• High-Velocity Bipolar Molecular Emission from an AGN Torus
• An image of the dust sublimation region in the nucleus of NGC 1068
• Nuclear 11.3$\mu$m PAH emission in local active galactic nuclei
• Multi-phase Nature of a Radiation-Driven Fountain with Nuclear Starburst in a Low-mass Active Galactic Nucleus
• Dissecting the active galactic nucleus in Circinus -- I. Peculiar mid-IR morphology explained by a dusty hollow cone
• Thermal imaging of dust hiding the black hole in the Active Galaxy NGC 1068
• Dissecting the active galactic nucleus in Circinus -- II. A thin dusty disc and a polar outflow on parsec scales
• A high angular resolution view of the PAH emission in Seyfert galaxies using JWST/MRS data
• Discovery of Kiloparsec Extended Hard X-ray Continuum and Fe K alpha from the Compton Thick AGN ESO428-G014
• Gemini Near Infrared Integral Field Spectroscopy of the Narrow-Line Region of ESO428-G14: kinematics, excitation and the role of the radio jet
• Low-power jet-ISM interaction in NGC 7319 revealed by JWST/MIRI MRS
• The Galaxy Activity, Torus and Outflow Survey (GATOS): II. Torus and polar dust emission in nearby Seyfert galaxies
• On the LINER nuclear obscuration, Compton-thickness and the existence of the dusty torus; Clues from Spitzer/IRS spectra
• The central parsecs of active galactic nuclei: challenges to the torus
• The dusty heart of Circinus: I. Imaging the circumnuclear dust in N-band
• The nuclear and extended infrared emission of the Seyfert galaxy NGC 2992 and the interacting system Arp 245
• The nuclear and extended mid-infrared emission of Seyfert galaxies
• Radiation hydrodynamics models of Active Galactic Nuclei: Beyond the central parsec
• AGN feedback in action in the molecular gas ring of the Seyfert galaxy NGC7172
• Dust Destruction by Drift-Induced Sputtering in Active Galactic Nuclei
• The role of grain size in AGN torus dust models

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