Spatially resolved BPT mapping of nearby Seyfert 2 galaxies

Abstract

We present spatially resolved BPT mapping of the extended narrow line regions (ENLRs) of seven nearby Seyfert 2 galaxies, using HST narrow band filter imaging. We construct the BPT diagrams using $\le$ 0.1" resolution emission line images of [O III]$\lambda$5007, H$\alpha$, [S II]$\lambda$$\lambda$6717,6731, and H$\beta$. By mapping these diagnostic lines according to the BPT classification, we dissect the ENLR into Seyfert, LINER, and star-forming regions. The nucleus and ionization cones are dominated by Seyfert-type emission, which can be interpreted as predominantly photoionization by the active galactic nucleus (AGN). The Seyfert nucleus and ionization cones transition to and are surrounded by a LINER cocoon, extending up to $\sim$ 250 pc in thickness. The ubiquity of the LINER cocoon in Seyfert 2 galaxies suggests that the circumnuclear regions are not necessarily Seyfert-type, and LINER activity plays an important role in Seyfert 2 galaxies. We demonstrate that spatially resolved diagnostics are crucial to understanding the excitation mechanisms in different regions and the AGN-host galaxy interactions.

arXiv comment19 pages, 14 figures; accepted for publication in ApJ

References in corpus (58)

• Coevolution (Or Not) of Supermassive Black Holes and Host Galaxies
• The Host Galaxies of AGN
• Observational Evidence of AGN Feedback
• Theoretical Modeling of Starburst Galaxies
• The Host Galaxies and Classification of Active Galactic Nuclei
• A Unified, Merger-Driven Model for the Origin of Starbursts, Quasars, the Cosmic X-Ray Background, Supermassive Black Holes and Galaxy Spheroids
• Overview of the SDSS-IV MaNGA Survey: Mapping Nearby Galaxies at Apache Point Observatory
• The Co-Evolution of Galaxies and Supermassive Black Holes: Insights from Surveys of the Contemporary Universe
• Nuclear Activity in Nearby Galaxies
• The MAPPINGS III Library of Fast Radiative Shock Models
• A Hubble Space Telescope Imaging Survey of Nearby Active Glactic Nuclei
• Understanding Galaxy Evolution through Emission Lines
• SDSS IV MaNGA - Spatially resolved diagnostic diagrams: A proof that many galaxies are LIERs
• Radio Sources in Low-Luminosity Active Galactic Nuclei.IV. Radio Luminosity Function, Importance of Jet Power, and Radio Properties of the Complete Palomar Sample
• Determining Inclinations of Active Galactic Nuclei Via Their Narrow-Line Region Kinematics - I. Observational Results
• The Nature of LINER-like Emission in Red Galaxies
• Galaxy-Wide Shocks in Late-Merger Stage Luminous Infrared Galaxies
• 3D Integral Field Observations of Ten Galactic Winds - I. Extended phase (>10 Myr) of mass/energy injection before the wind blows
• Nuclear Luminosities and Radio Loudness of Seyfert Nuclei
• Observations of Feedback from Radio-Quiet Quasars: I. Extents and Morphologies of Ionized Gas Nebulae
• The SAMI Galaxy Survey: Shocks and Outflows in a normal star-forming galaxy
• HST and VLA Observations of Seyfert 2 Galaxies: The Relationship between Radio Ejecta and the Narrow Line Region
• The MAGNUM survey: Positive feedback in the nuclear region of NGC 5643 suggested by MUSE
• A Hubble Space Telescope Survey of Extended [OIII]5007A Emission in a Far-Infrared Selected Sample of Seyfert Galaxies: Observations
• The Galaxy Zoo survey for giant AGN-ionized clouds: past and present black-hole accretion events
• Effects of Pre-ionisation in Radiative Shocks I: Self-Consistent Models
• The MAGNUM survey: different gas properties in the outflowing and disk components in nearby active galaxies with MUSE
• The radio structure of radio-quiet quasars
• The ionized gas in the CALIFA early-type galaxies I. Mapping two representative cases: NGC 6762 and NGC 5966
• The Origin of Radio Emission in Low-Luminosity Active Galactic Nuclei: Jets, Accretion Flows, or Both?
• P-MaNGA: Emission Lines Properties - Gas Ionisation and Chemical Abundances from Prototype Observations
• Evidence For A Precessing Accretion Disk in the Nucleus of NGC 1097
• A candidate sub-parsec binary black hole in the Seyfert galaxy NGC 7674
• Quantifying Feedback from Narrow Line Region Outflows in Nearby Active Galaxies. I. Spatially Resolved Mass Outflow Rates for the Seyfert 2 Galaxy Markarian 573
• The SAMI Galaxy Survey: extraplanar gas, galactic winds, and their association with star formation history
• Radio Variability in Seyfert Nuclei
• HST Imaging of Fading AGN Candidates I: Host-Galaxy Properties and Origin of the Extended Gas
• On the lifetime of merger features of equal-mass disk mergers
• Dissecting Galaxies: Spatial and Spectral Separation of Emission Excited by Star Formation and AGN Activity
• Probing the Physics of Narrow Line Regions in Active Galaxies II: The Siding Spring Southern Seyfert Spectroscopic Snapshot Survey (S7)
• Evidence for an outflow from the Seyfert galaxy NGC 4051
• A New Diagnostic to Separate Line Emission from Star Formation, Shocks, and AGN Simultaneously in IFU Data
• Probing the Ionization Structure of the Narrow Line Region in the Seyfert 1 Galaxy NGC 4151
• The Spatial Clustering of Low Luminosity AGN
• Dissecting Galaxies: Separating Star Formation, Shock Excitation and AGN Activity in the Central Region of NGC 613
• CHEERS results on Mrk 573: Study of deep Chandra observations
• Bipolar ionization cones in the Extended Narrow-Line Region of nearby QSO2s
• Feeding and Feedback in NGC3081
• Sensitive VLBI Continuum and H I Absorption Observations of NGC 7674: First Scientific Observations with the Combined Array VLBA, VLA & Arecibo
• Ionized Gas Outflows from the MAGNUM Survey: NGC 1365 and NGC 4945
• CHEERS Results from NGC 3393, II: Investigating the Extended Narrow Line Region using Deep Chandra Observations and Hubble Narrow Line Imaging
• Chandra Observations of NGC 7212: Large-scale Extended Hard X-ray Emission
• Imaging Extended Emission-Line Regions of Obscured AGN with the Subaru Hyper Suprime-Cam Survey
• The Highest Resolution Chandra View of Photoionization and Jet-Cloud Interaction in the Nuclear Region of NGC 4151
• Mapping Seyfert and LINER Excitation Modes in the Inner kpc of NGC 3393
• High resolution spectroscopy of the extended narrow-line region of IC 5063 and NGC 7212
• Circumnuclear regions of different BPT types in star-forming MaNGA galaxies: AGN detectability
• The origin of gas in the Extended Narrow Line Region of nearby Seyfert galaxies.I. NGC 7212

Cited by in corpus (8)

• Quantifying Feedback from Narrow Line Region Outflows in Nearby Active Galaxies. III. Results for the Seyfert 2 Galaxies Markarian 3, Markarian 78, and NGC 1068
• UV and H$\alpha$ HST observations of 6 GASP jellyfish galaxies
• Polycyclic Aromatic Hydrocarbon Emission in the Central Regions of Three Seyferts the Implication for Underlying Feedback Mechanisms
• A Giant Loop of Ionized Gas Emerging from the Tumultuous Central Region of IC 5063
• The interaction of the active nucleus with the host galaxy interstellar medium
• Chemical abundances in Seyfert galaxies -- VIII. Argon abundance estimates
• Mapping the Excitation Mechanisms in the LINER I Active Galactic Nucleus NGC 5005: Positive Feedback and a Thin LINER Cocoon
• Physical Drivers of Emission Line Diversity of SDSS Seyfert 2s and LINERs After Removal of Contributions by Star Formation