VLTI/GRAVITY Interferometric Measurements of Innermost Dust Structure Sizes around AGNs

Abstract

We present new VLTI/GRAVITY near-infrared interferometric measurements of the angular size of the innermost hot dust continuum for 14 type 1 AGNs. The angular sizes are resolved on scales of ~0.7 mas and the inferred ring radii range from 0.028 to 1.33 pc, comparable to those reported previously and a factor 10-20 smaller than the mid-infrared sizes in the literature. Combining our new data with previously published values, we compile a sample of 25 AGN with bolometric luminosity ranging from $10^{42}$ to $10^{47}\mathrm{erg}{\mathrm{s}}^{-1}$, with which we study the radius-luminosity (R-L) relation for the hot dust structure. Our interferometric measurements of radius are offset by a factor 2 from the equivalent relation derived through reverberation mapping. Using a simple model to explore the dust structure's geometry, we conclude that this offset can be explained if the 2 um emitting surface has a concave shape. Our data show that the slope of the relation is in line with the canonical $R\propto L^{0.5}$ when using an appropriately non-linear correction for bolometric luminosity. In contrast, using optical luminosity or applying a constant bolometric correction to it results in a significant deviation in the slope, suggesting a potential luminosity dependence on the spectral energy distribution. Over four orders of magnitude in luminosity, the intrinsic scatter around the R-L relation is 0.2 dex, suggesting a tight correlation between innermost hot dust structure size and the AGN luminosity.

14 pages, 5 figures, 4 tables, accepted for publication in A&A

References in corpus (74)

• Planck 2015 results. XIII. Cosmological parameters
• The Wide-field Infrared Survey Explorer (WISE): Mission Description and Initial On-orbit Performance
• Unified Schemes for Radio-Loud Active Galactic Nuclei
• Local Supermassive Black Holes, Relics of Active Galactic Nuclei and the X-ray Background
• Some Aspects of Measurement Error in Linear Regression of Astronomical Data
• Revisiting the Unified Model of Active Galactic Nuclei
• AGN Dusty Tori: II. Observational Implications of Clumpiness
• The 70 Month Swift-BAT All-Sky Hard X-Ray Survey
• AGN Dusty Tori: I. Handling of Clumpy Media
• First Light for GRAVITY: Phase Referencing Optical Interferometry for the Very Large Telescope Interferometer
• Revisiting the Infrared Spectra of Active Galactic Nuclei with a New Torus Emission Model
• Piecing Together the X-ray Background: Bolometric Corrections for Active Galactic Nuclei
• Reverberation Measurements of the Inner Radius of the Dust Torus in Nearby Seyfert 1 Galaxies
• The dust covering factor in active galactic nuclei
• Two ten-billion-solar-mass black holes at the centres of giant elliptical galaxies
• Simultaneous X-ray/optical/UV snapshots of active galactic nuclei from XMM-Newton: spectral energy distributions for the reverberation mapped sample
• Universal bolometric corrections for AGN over 7 luminosity decades
• The close environments of accreting massive black holes are shaped by radiative feedback
• BAT AGN Spectroscopic Survey I: Spectral Measurements, Derived Quantities, and AGN Demographics
• X-ray Spectral Properties of the BAT AGN Sample
• Spatially resolved rotation of the broad-line region of a quasar at sub-parsec scale
• X-ray emission from radio-quiet quasars in the SDSS Early Data Release. The alpha_ox dependence upon UV luminosity
• A diversity of dusty AGN tori: Data release for the VLTI/MIDI AGN Large Program and first results for 23 galaxies
• Reverberation Measurements of the Inner Radius of the Dust Torus in 17 Seyfert Galaxies
• The innermost region of AGN tori: implications from the HST/NICMOS Type 1 point sources and near-IR reverberation
• Dust in the polar region as a major contributor to the IR emission of AGN
• The dusty heart of nearby active galaxies -- II. From clumpy torus models to physical properties of dust around AGN
• A ~50,000 solar mass black hole in the nucleus of RGG 118
• The subarcsecond mid-infrared view of local active galactic nuclei: I. The N- and Q-band imaging atlas
• Hot Graphite Dust and the Infrared Spectral Energy Distribution of Active Galactic Nuclei
• Bolometric correction factors for Active Galactic Nuclei
• Dusty winds in active galactic nuclei: reconciling observations with models
• Mapping the radial structure of AGN tori
• Redefining the torus: A unifying view of AGN in the infrared and sub-mm
• The innermost dusty structure in active galactic nuclei as probed by the Keck interferometer
• Mid-infrared interferometry of 23 AGN tori: On the significance of polar-elongated emission
• The Swift/BAT AGN Spectroscopic Survey (BASS) -- VI. The Gamma_X - L/L_Edd relation
• The broad emission-line region: the confluence of the outer accretion disc with the inner edge of the dusty torus
• An image of the dust sublimation region in the nucleus of NGC 1068
• The spectral energy distribution of the central parsecs of the nearest AGN
• On the Gas Content and Efficiency of AGN Feedback in Low-redshift Quasars
• Interferometer Observations of Subparsec-scale Infrared Emission in the Nucleus of NGC 4151
• Mid-infrared properties of nearby low-luminosity AGN at high angular resolution
• The Swift BAT-detected Seyfert 1 Galaxies: X-ray Broadband Properties and Warm Absorbers
• A 40-billion solar mass black hole in the extreme core of Holm 15A, the central galaxy of Abell 85
• Thermal imaging of dust hiding the black hole in the Active Galaxy NGC 1068
• Exploring the inner region of Type 1 AGNs with the Keck interferometer
• Hunting for Massive Black Holes in Dwarf Galaxies
• The central parsec of NGC 3783: a rotating broad emission line region, asymmetric hot dust structure, and compact coronal line region
• The resolved size and structure of hot dust in the immediate vicinity of AGN
• Mid-IR Variability and Dust Reverberation Mapping of Low-$z$ Quasars. I. Data, Methods and Basic Results
• Orientation Effects on the Inner Region of Dusty Torus of Active Galactic Nuclei
• New evidence for the dusty wind model: Polar dust and a hot core in the type-1 Seyfert ESO323-G77
• The Infrared Emission and Opening Angle of the Torus in Quasars
• Reverberation Measurements of the Inner Radii of the Dust Tori in Quasars
• A dynamical measure of the black hole mass in a quasar 11 billion years ago
• Evidence for a receding dust sublimation region around a supermassive black hole
• MaNGA AGN dwarf galaxies (MAD) -- I. A new sample of AGN in dwarf galaxies with spatially resolved spectroscopy
• Luminosity-variation independent location of the circum-nuclear, hot dust in NGC 4151
• VLTI/AMBER observations of the Seyfert nucleus of NGC 3783
• The properties of the AGN torus as revealed from a set of unbiased NuSTAR observations
• Constraining properties of dusty environments by infrared variability
• Dust Reverberation Mapping in Distant Quasars from Optical and Mid-Infrared Imaging Surveys
• Intrinsic AGN SED & black hole growth in the Palomar--Green quasars
• Dust reverberation-mapping of the Seyfert 1 galaxy WPVS48
• First Light for GRAVITY Wide: Large Separation Fringe Tracking for the Very Large Telescope Interferometer
• Simultaneous H alpha and dust reverberation mapping of 3C120: Testing the bowl-shaped torus geometry
• Compact jets dominate the continuum emission in low-luminosity active galactic nuclei
• Dust Reverberation of 3C273: torus structure and lag -- luminosity relation
• Resolving the Hot Dust Disk of ESO323-G77
• The dust sublimation region of the Type 1 AGN NGC4151 at a hundred micro-arcsecond scale as resolved by the CHARA Array interferometer
• Dust in the central parsecs of unobscured AGN: more challenges to the torus
• Chromatically modelling the parsec scale dusty structure in the centre of NGC1068
• Dust Reverberation Mapping and Light-Curve Modelling of Zw229-015

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