Probing the physics of narrow-line regions of Seyfert galaxies I: The case of NGC 5427

Abstract

We have used the Wide Field Spectrograph (WiFeS) on the ANU 2.3m telescope at Siding Spring to observe the nearby, nearly face-on, Seyfert 2 galaxy, NGC 5427. We have obtained integral field spectroscopy of both the nuclear regions and the HII regions in the spiral arms. We have constrained the chemical abundance in the interstellar medium of the extended narrow line region (ENLR) by measuring the abundance gradient in the circum-nuclear \ion{H}{ii} regions to determine the nuclear chemical abundances, and to use these to in turn determine the EUV spectral energy distribution for comparison with theoretical models. We find a very high nuclear abundance, $\sim 3.0$ times solar, with clear evidence of a nuclear enhancement of N and He, possibly caused by massive star formation in the extended ($\sim 100$pc) central disk structure. The circum-nuclear narrow-line region spectrum is fit by a radiation pressure dominated photoionisation model model with an input EUV spectrum from a Black Hole with mass $5\times 10^7{M}_{\odot }$ radiating at $\sim 0.1$ of its Eddington luminosity. The bolometric luminosity is closely constrained to be $\log L_{\mathrm{b}ol.}=44.3\pm 0.1$ erg s${}^{-1}$. The EUV spectrum characterised by a soft accretion disk and a harder component extending to above 15keV. The ENLR region is extended in the NW-SE direction. The line ratio variation in circum-nuclear spaxels can be understood as the result of mixing \ion{H}{ii} regions with an ENLR having a radius-invariant spectrum.

arXiv commentAccepted for publication in Astronomy and Astrophysics, 14 pages, 13 figures

References in corpus (60)

• The Host Galaxies of AGN
• The slope of the black-hole mass versus velocity dispersion correlation
• The Optical and Near-Infrared Properties of Galaxies: I. Luminosity and Stellar Mass Functions
• Parametric Recovery of Line-of-Sight Velocity Distributions from Absorption-Line Spectra of Galaxies via Penalized Likelihood
• The Host Galaxies and Classification of Active Galactic Nuclei
• Atomic Data for Astrophysics. II. New Analytic Fits for Photoionization Cross Sections of Atoms and Ions
• Cosmic-Ray Rejection by Laplacian Edge Detection
• Adaptive spatial binning of integral-field spectroscopic data using Voronoi tessellations
• The SAURON project - V. Integral-field emission-line kinematics of 48 elliptical and lenticular galaxies
• AGN Black Hole Masses and Bolometric Luminosities
• Intrinsic disc emission and the Soft X-ray Excess in AGN
• Evolutionary Stellar Population Synthesis at High Spectral Resolution: Optical Wavelengths
• The Wide Field Spectrograph (WiFeS)
• A nonextensive entropy approach to kappa-distributions
• Outflows from AGN: Kinematics of the Narrow-Line and Coronal-Line Regions in Seyfert Galaxies
• Dusty, Radiation Pressure Dominated Photoionization. I. Model Description, Structure And Grids
• New Strong Line Abundance Diagnostics for \HII Regions: Effects of $\kappa$-Distributed Electron Energies and New Atomic Data
• Bulge n and B/T in High Mass Galaxies: Constraints on the Origin of Bulges in Hierarchical Models
• Characterizing Bars at z~0 in the optical and NIR: Implications for the Evolution of Barred Disks with Redshift
• Dusty, Radiation Pressure Dominated Photoionization. II. Multi-Wavelength Emission Line Diagnostics for Narrow Line Regions
• The Wide Field Spectrograph (WiFeS): Performance and Data Reduction
• Resolving the electron temperature discrepancies in HII Regions and Planetary Nebulae: kappa-distributed electrons
• AINUR: Atlas of Images of NUclear Rings
• Are the Narrow Line Regions in Active Galaxies Dusty and Radiation Pressure Dominated?
• A Combined Optical and X-ray Study of Unobscured Type 1 AGN. I. Optical Spectra and SED Modeling
• Eliminating Error in the Chemical Abundance Scale for Extragalactic HII Regions
• A Hubble Space Telescope Survey of Extended [OIII]5007A Emission in a Far-Infrared Selected Sample of Seyfert Galaxies: Results
• A Hubble Space Telescope Survey of Extended [OIII]5007A Emission in a Far-Infrared Selected Sample of Seyfert Galaxies: Observations
• A combined Optical and X-ray Spectra Study for Type 1 AGN. III. Broadband SED Properties
• Circumnuclear Dust in Nearby Active and Inactive Galaxies. I. Data
• PyWiFeS: A Rapid Data Reduction Pipeline for the Wide Field Spectrograph (WiFeS)
• Kinetic theoretical foundation of Lorentzian statistical mechanics
• An Integral Field Study of Abundance Gradients in Nearby LIRGs
• Are Seyfert Narrow Line Regions Powered by Radio Jets?
• Galaxy And Mass Assembly (GAMA): A deeper view of the mass, metallicity, and SFR relationships
• Radio structures of the nuclei of nearby Seyfert galaxies and the nature of the missing diffuse emission
• Physical Conditions in the Seyfert Galaxy NGC 2992
• A Combined Optical and X-ray Study of Unobscured Type 1 AGN. II. Relation Between X-ray Emission and Optical Spectra
• Radiation Pressure Confinement - I. Ionized Gas in the ISM of AGN Hosts
• Upper Limits on the Masses of 105 Supermassive Black Holes from Hubble Space Telescope/Space Telescope Imaging Spectrograph Archival Data
• Starburst-AGN mixing: I. NGC 7130
• Sub-parsec radio cores in nearby Seyfert galaxies
• Star formation in accretion discs : from the Galactic Center to Active Galactic Nuclei
• Theoretical calculations of the HI, HeI and HeII free-bound continuou emission spectra
• PROFIT: a new alternative for emission-line PROfile FITting
• An Investigation into the Geometry of Seyfert Galaxies
• Evolution of chemical abundances in Seyfert galaxies
• Optical vs. infrared studies of dusty galaxies and AGN: (I) Nebular emission lines
• The isolated interacting galaxy pair NGC 5426/27 (Arp 271)
• Starburst or Seyfert? Using near-infrared spectroscopy to measure the activity in composite galaxies
• Chandra Observations of Candidate "True" Seyfert 2 Nuclei
• Do Jet-Driven Shocks ionize the Narrow Line Regions of Seyfert Galaxies?
• Parsec-scale Imaging of the Radio-bubble Seyfert galaxy NGC 6764
• Gas Metallicity of Narrow-Line Regions in Narrow-Line Seyfert 1 Galaxies and Broad-Line Seyfert 1 Galaxies
• Spatially Resolved Ultraviolet Spectra of the High-Velocity Nuclear Outflow of NGC 1068
• Extended narrow-line emission in the bright Seyfert 1.5 galaxy HE 2211-3903
• Dust masses and star formation in bright IRAS galaxies Application of a physical model for the interpretation of FIR observations
• The nature of Composite Seyfert/Star-forming galaxies revealed by X-ray observations
• Strict Limits on the Ionizing Luminosity in NGC 1068 from Jet-axis Molecular Clouds
• Detection of infalling hydrogen in transfer between the interacting galaxies NGC 5426 and NGC 5427

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