Investigating the dusty torus of Seyfert galaxies using SOFIA/FORCAST photometry

Abstract

We present 31.5 micron imaging photometry of 11 nearby Seyfert galaxies observed from the Stratospheric Observatory For Infrared Astronomy (SOFIA) using the Faint Object infraRed CAmera for the SOFIA Telescope (FORCAST). We tentatively detect extended 31 micron emission for the first time in our sample. In combination with this new data set, subarcsecond resolution 1-18 micron imaging and 7.5-13 micron spectroscopic observations were used to compute the nuclear spectral energy distribution (SED) of each galaxy. We found that the turnover of the torus emission does not occur at wavelengths <31.5 micron, which we interpret as a lower-limit for the wavelength of peak emission. We used CLUMPY torus models to fit the nuclear infrared (IR) SED and infer trends in the physical parameters of the AGN torus for the galaxies in the sample. Including the 31.5 micron nuclear flux in the SED 1) reduces the number of clumpy torus models compatible with the data, and 2) modifies the model output for the outer radial extent of the torus for 10 of the 11 objects. Specifically, six (60%) objects show a decrease in radial extent while four (40%) show an increase. We find torus outer radii ranging from <1pc to 8.4 pc

arXiv comment15 pages, 7 figures. Accepted for publication in MNRAS

References in corpus (53)

• Unified Schemes for Radio-Loud Active Galactic Nuclei
• AGN Dusty Tori: II. Observational Implications of Clumpiness
• Dust Emission from Active Galactic Nuclei
• Defining the intrinsic AGN infrared spectral energy distribution and measuring its contribution to the infrared output of composite galaxies
• Three-dimensional radiative transfer modeling of AGN dusty tori as a clumpy two-phase medium
• Early Science with SOFIA, the Stratospheric Observatory for Infrared Astronomy
• CASSIS: The Cornell Atlas of Spitzer/IRS Sources
• Resolving the complex structure of the dust torus in the active nucleus of the Circinus galaxy
• The Megamaser Cosmology Project. III. Accurate Masses of Seven Supermassive Black Holes in Active Galaxies with Circumnuclear Megamaser Disks
• A diversity of dusty AGN tori: Data release for the VLTI/MIDI AGN Large Program and first results for 23 galaxies
• Radiative Transfer Modeling of Three-Dimensional Clumpy AGN Tori and its Application to NGC 1068
• Torus and AGN properties of nearby Seyfert galaxies: Results from fitting IR spectral energy distributions and spectroscopy
• The innermost region of AGN tori: implications from the HST/NICMOS Type 1 point sources and near-IR reverberation
• The dusty heart of nearby active galaxies -- II. From clumpy torus models to physical properties of dust around AGN
• ALMA resolves the torus of NGC 1068: continuum and molecular line emission
• Resolving the obscuring torus in NGC 1068 with the power of infrared interferometry: Revealing the inner funnel of dust
• Radio Sources in Low-Luminosity Active Galactic Nuclei. III. "AGNs" in a Distance-Limited Sample of "LLAGNs"
• The subarcsecond mid-infrared view of local active galactic nuclei: I. The N- and Q-band imaging atlas
• Thick tori around AGN: the case for extended tori and consequences for their X-ray and IR emission
• The Infrared Nuclear Emission of Seyfert Galaxies on Parsec Scales: Testing the Clumpy Torus models
• Smooth and Clumpy Dust Distribution in AGN: a Direct Comparison of two Commonly Explored Infrared Emission Models
• Testing the Unification Model for AGN in the Infrared: are the obscuring tori of Type 1 and 2 Seyferts different?
• The dusty heart of nearby active galaxies. I. High-spatial resolution mid-IR spectro-photometry of Seyfert galaxies
• Mid-infrared emission of galactic nuclei: TIMMI2 versus ISO observations and models
• The spectral energy distribution of the central parsecs of the nearest AGN
• First Science Observations with SOFIA/FORCAST: The FORCAST Mid-infrared Camera
• On the difference of torus geometry between hidden and non-hidden broad line active galactic nuclei
• The Link Between the Hidden Broad Line Region and the Accretion Rate in Seyfert 2 Galaxies
• Resolved Mid-IR Emission in the Narrow Line Region of NGC 4151
• Spectral Energy Distributions of Seyfert Nuclei
• Dust in active galactic nuclei. Mid-infrared T-ReCS/Gemini spectra using the new RedCan pipeline
• The non-stellar infrared continuum of Seyfert galaxies
• The Nuclear Infrared Emission of Low-Luminosity Active Galactic Nuclei
• Near-infrared spectroscopy of nearby Seyfert galaxies - II. Molecular content and coronal emission
• A mid-infrared spectroscopic atlas of local active galactic nuclei on sub-arcsecond resolution using GTC/CanariCam
• The Nuclear Near-Infrared Spectral Properties of Nearby Galaxies
• The Multitude of Unresolved Continuum Sources at 1.6 microns in Hubble Space Telescope images of Seyfert Galaxies
• Modeling the Nuclear Infrared Spectral Energy Distribution of Type II Active Galactic Nuclei
• BayesCLUMPY: Bayesian Inference with Clumpy Dusty Torus Models
• The Origin of the Silicate Emission Features in the Seyfert 2 Galaxy, NGC 2110
• Gemini Imaging of Mid-IR Emission from the Nuclear Region of Centaurus A
• Resolving the AGN and host emission in the mid-infrared using a model-independent spectral decomposition
• X-ray absorption, nuclear infrared emission and dust covering factors of AGN: testing Unification Schemes
• Self-consistent 2-phase AGN torus models: SED library for observers
• Dust Emission from Unobscured Active Galactic Nuclei
• VLT diffraction-limited imaging at 11 and 18 micron of the nearest active galactic nuclei
• Silicate absorption in heavily obscured galaxy nuclei
• Investigating the sensitivity of observed spectral energy distributions to clumpy torus properties in Seyfert galaxies
• The Near- and Mid-Infrared Continuum Emission of Seyfert Nuclei: Constraints on the Models of Obscuring Tori
• The nuclear and extended infrared emission of the Seyfert galaxy NGC 2992 and the interacting system Arp 245
• Near-infrared and X-ray obscuration to the nucleus of the Seyfert 2 galaxy NGC 3281
• Resolving the nuclear dust distribution of the Seyfert 2 galaxy NGC 3081
• Constraining clumpy dusty torus models using optimized filter sets

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• The Complete Infrared View of Active Galactic Nuclei from the 70-month Swift/BAT Catalog
• BAT AGN Spectroscopic Survey - XI. The Covering Factor of Dust and Gas in Swift/BAT Active Galactic Nuclei
• X-ray spectral and eclipsing model of the clumpy obscurer in active galactic nuclei
• Resolving the nuclear obscuring disk in the Compton-thick Seyfert galaxy NGC5643 with ALMA
• Polar Dust, Nuclear Obscuration and IR SED Diversity in Type-1 AGNs
• Torus model properties of an ultra-hard X-ray selected sample of Seyfert galaxies
• The emission and distribution of dust of the torus of NGC 1068
• Exploring the mid-infrared SEDs of six AGN dusty torus models II: the data
• Probing the Active Galactic Nuclei Unified Model Torus Properties in Seyfert Galaxies
• Torus and polar dust dependence on AGN properties
• The dusty tori of nearby QSOs as constrained by high-resolution mid-IR observations
• Exploring the mid-infrared SEDs of six AGN dusty torus models I: synthetic spectra
• Application of X-Ray Clumpy Torus Model (XCLUMPY) to 10 Obscured Active Galactic Nuclei Observed with Suzaku and NuSTAR
• AGN torus detectability at sub-millimeter wavelengths: What to expect from ALMA continuum data
• The Extreme Super-Eddington NLS1 RX J0134.2-4258 -- II. A Weak-Line Seyfert Linking to the Weak-Line Quasar
• SOFIA/FORCAST resolves 30 - 40 um extended dust emission in nearby active galactic nuclei
• Hypercubes of AGN Tori (HYPERCAT) -- I. Models and Image Morphology
• Blazar Sheath Illumination of the Outer Molecular Torus: A Resolution of the Seed Photon Problem for the far-GeV Blazar flares
• Chandra Imaging of the Outer Accretion Flow onto the Black Hole at the Center of the Perseus Cluster
• On the origin of radio-loudness in active galactic nuclei using far-infrared polarimetric observations
• Modeling the unresolved NIR-MIR SEDs of local ($z<0.1$) QSOs
• Destruction of the central black hole gas reservoir through head-on galaxy collisions