Reverberation Measurements of the Inner Radii of the Dust Tori in Quasars

Abstract

We present the results of a dust-reverberation survey of quasars at redshifts z<0.6. We found a delayed response of the K-band flux variation after the optical flux variation in 25 out of 31 targets, and obtained the lag time between them for 22 targets. Combined with the results for nearby Seyfert galaxies, we provide the largest homogeneous collection of K-band dust-reverberation data for 36 type 1 active galactic nuclei (AGNs). This doubles the sample and includes the most distant AGN and the largest lag so far measured. We estimated the optical luminosity of the AGN component of each target using three different methods: spectral decomposition, the flux-variation-gradient method, and image decomposition. We found a strong correlation between the reverberation radius for the innermost dust torus and the optical luminosity over a range of approximately four orders of magnitude in luminosity, as is already known for Seyfert galaxies. We estimated the luminosity distances of the AGNs based on their dust-reverberation lags, and found that the data in the redshift-distance diagram are consistent with the current standard estimates of the cosmological parameters. We also present the radius-luminosity relations for isotropic luminosity indicators such as the hard X-ray (14--195 keV), [OIV] 25.89 um, and mid-infrared (12 um) continuum luminosities, which are applicable to obscured AGNs.

arXiv commentAccepted for publication in ApJ; Proof correction was applied

References in corpus (77)

• Measuring Reddening with SDSS Stellar Spectra and Recalibrating SFD
• Wilkinson Microwave Anisotropy Probe (WMAP) Three Year Results: Implications for Cosmology
• Detailed Structural Decomposition of Galaxy Images
• Reverberation Measurements for 17 Quasars and the Size-Mass-Luminosity Relations in Active Galactic Nuclei
• Some Aspects of Measurement Error in Linear Regression of Astronomical Data
• Cosmological Evolution of the Hard X-ray AGN Luminosity Function and the Origin of the Hard X-ray Background
• The Tenth Data Release of the Sloan Digital Sky Survey: First Spectroscopic Data from the SDSS-III Apache Point Observatory Galactic Evolution Experiment
• Spectral Energy Distributions of Hard X-ray selected AGNs in the XMDS Survey
• The Low-Luminosity End of the Radius-Luminosity Relationship for Active Galactic Nuclei
• Are the Variations in Quasar Optical Flux Driven by Thermal Fluctuations?
• Modeling the Time Variability of SDSS Stripe 82 Quasars as a Damped Random Walk
• On Uncertainties in Cross-Correlation Lags and the Reality of Wavelength-Dependent Continuum Lags in Active Galactic Nuclei
• The 70 Month Swift-BAT All-Sky Hard X-Ray Survey
• BAT AGN Spectroscopic Survey - V. X-ray properties of the Swift/BAT 70-month AGN catalog
• Reverberation Measurements of the Inner Radius of the Dust Torus in Nearby Seyfert 1 Galaxies
• Quantifying Quasar Variability As Part of a General Approach To Classifying Continuously Varying Sources
• An Alternative Approach To Measuring Reverberation Lags in Active Galactic Nuclei
• Is Quasar Optical Variability a Damped Random Walk?
• The incidence of obscuration in active galactic nuclei
• A Description of Quasar Variability Measured Using Repeated SDSS and POSS Imaging
• Dust covering factor, silicate emission and star formation in luminous QSOs
• Spatially resolved rotation of the broad-line region of a quasar at sub-parsec scale
• The luminosity dependence of the Type 1 AGN fraction
• Reverberation Measurements of the Inner Radius of the Dust Torus in 17 Seyfert Galaxies
• Northern JHK Standard Stars for Array Detectors
• The 2dF QSO Redshift Survey - V. The 10k catalogue
• The Tully-Fisher relations of early-type spiral and S0 galaxies
• The subarcsecond mid-infrared view of local active galactic nuclei: I. The N- and Q-band imaging atlas
• Mean Spectral Energy Distributions and Bolometric Corrections for Luminous Quasars
• Dust inflated accretion disc as the origin of the Broad Line Region in Active Galactic Nuclei
• New Indicators for AGN Power: The Correlation Between [O IV] lambda 25.89 micron and Hard X-ray Luminosity for Nearby Seyfert Galaxies
• The innermost dusty structure in active galactic nuclei as probed by the Keck interferometer
• The multiwavelength variability of 3C 273
• Inner Size of a Dust Torus in the Seyfert 1 Galaxy NGC 4151
• Spitzer-IRS high resolution spectroscopic survey of the 12 micron Seyfert galaxies: II. Results for the Complete Dataset
• Isotropic Luminosity Indicators in a Complete AGN Sample
• Long-term IR Photometry of Seyferts
• Application of Stochastic Modeling to Analysis of Photometric Reverberation Mapping Data
• Mid-Infrared Properties of the Swift Burst Alert Telescope Active Galactic Nuclei Sample of the Local Universe. I. Emission-Line Diagnostics
• Near-Infrared Reverberation by Dusty Clumpy Tori in Active Galactic Nuclei
• QSFit: Automatic analysis of optical AGN spectra
• Spitzer/IRS Observations of Seyfert 1.8s and 1.9s: A Comparison with Seyfert 1s and Seyfert 2s
• Mid-IR Variability and Dust Reverberation Mapping of Low-$z$ Quasars. I. Data, Methods and Basic Results
• Variation of Inner Radius of Dust Torus in NGC4151
• The Lick AGN Monitoring Project: Alternate Routes to a Broad-line Region Radius
• Orientation Effects on the Inner Region of Dusty Torus of Active Galactic Nuclei
• Long-Term Optical Continuum Color Variability of Nearby Active Galactic Nuclei
• A New Method for Measuring Extragalactic Distances
• Optical and Near-IR long-term monitoring of NGC3783 and MR2251-178: evidence for variable near-IR emission from thin accretion discs
• Evidence for a receding dust sublimation region around a supermassive black hole
• Luminosity-variation independent location of the circum-nuclear, hot dust in NGC 4151
• Hitomi Observation of Radio Galaxy NGC 1275: The First X-ray Microcalorimeter Spectroscopy of Fe-Kα Line Emission from an Active Galactic Nucleus
• Long-term monitoring of the archetype Seyfert galaxy MCG-6-30-15: X-ray, optical and near-IR variability of the corona, disc and torus
• On the size-luminosity relation of AGN dust tori in the mid-infrared
• Cosmology with AGN dust time lags -- Simulating the new VEILS survey
• A New Black Hole Mass Estimate for Obscured Active Galactic Nuclei
• Spitzer Space Telescope Measurements of Dust Reverberation Lags in the Seyfert 1 Galaxy NGC 6418
• The broad-line region and dust torus size of the Seyfert 1 galaxy PGC50427
• The first spectroscopic dust reverberation programme on active galactic nuclei: the torus in NGC 5548
• The curtain remains open: NGC 2617 continues in a high state
• Dust reverberation-mapping of the Seyfert 1 galaxy WPVS48
• Multiple Regression Analysis of the Variable Component in the Near-Infrared Region for Type 1 AGN MCG+08-11-011
• Simultaneous X-ray and infrared variability in the quasar 3C273
• The Difference in Narrow Fe KαLine Emission Between Seyfert 1 and Seyfert 2 Galaxies
• Dust reverberation mapping in the era of big optical surveys and its cosmological application
• Simultaneous H alpha and dust reverberation mapping of 3C120: Testing the bowl-shaped torus geometry
• Determination of the size of the dust torus in H0507+164 through optical and infrared monitoring
• Simultaneous X-ray and infrared variability in the quasar 3C273 II: Confirmation of the correlation and X-ray lag
• First Detection of Near-Infrared Intraday Variations in the Seyfert 1 Nucleus NGC4395
• $JH{K}^{\prime }$ Imaging Photometry of Seyfert 1 AGNs and Quasars III: Variability of Radio Quiet and Radio Loud AGNs
• Fe-K Line Time variability and Ni abundance of Distant Reflector in Seyfert Galaxies
• Monitoring the temperature and reverberation delay of the circumnuclear hot dust in NGC 4151
• A falling Corona model for the anomalous behavior of the broad emission lines in NGC 5548
• Calibration of AGN Reverberation Distance Measurements
• The 'Big Dipper': The nature of the extreme variability of the AGN SDSS J2232-0806
• The Relative Wavelength Independence of IR Time Lags in NGC4151 During the Years 2010-2015
• Narrow vs. Broad line Seyfert 1 galaxies: X-ray, optical and mid-infrared AGN characteristics

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• Multiphase Gas Nature in the Sub-parsec Region of the Active Galactic Nuclei I: Dynamical Structures of Dusty and Dust-free Outflow
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• Constraining AGN Torus Sizes with Optical and Mid-Infrared Ensemble Structure Functions
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• Spiral Arms in Broad-line Regions of Active Galactic Nuclei. II. Loosely Wound Cases: Reverberation Properties
• Spiral Arms in Broad-line Regions of Active Galactic Nuclei. I. Reverberation and Differential Interferometric Signals of Tightly Wound Cases
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• AGN Light Echoes and the Accretion Disc Self-Gravity Limit
• Dust Reverberation Mapping of Type 2 AGN NGC 2110 Realized with X-ray and 3-5 $\mu$m IR monitoring
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• Measurement of AGN dust extinction based on the near-infrared flux variability of WISE data
• Spectroastrometric Reverberation Mapping of Broad-line Regions
• A complex dust morphology in the high-luminosity AGN Mrk 876
• Updated Picture of the Active Galactic Nuclei with Dusty/Dust-free Gas Structures and Effects of the Radiation Pressure
• Dust Reverberation Mapping and Light-Curve Modelling of Zw229-015
• The Host Galaxy Fluxes of Active Galaxy Nuclei Are Generally Overestimated by the Flux Variation Gradient Method
• X-ray Unveiling Events in a z~1.6 Active Galactic Nucleus in the 7 Ms Chandra Deep Field-South
• Extreme X-ray Reflection in the Nucleus of the Seyfert Galaxy NGC 5033