Quasar Accretion Disk Sizes from Continuum Reverberation Mapping in the DES Standard Star Fields

Abstract

Measurements of the physical properties of accretion disks in active galactic nuclei are important for better understanding the growth and evolution of supermassive black holes. We present the accretion disk sizes of 22 quasars from continuum reverberation mapping with data from the Dark Energy Survey (DES) standard star fields and the supernova C fields. We construct continuum lightcurves with the \textit{griz} photometry that span five seasons of DES observations. These data sample the time variability of the quasars with a cadence as short as one day, which corresponds to a rest frame cadence that is a factor of a few higher than most previous work. We derive time lags between bands with both JAVELIN and the interpolated cross-correlation function method, and fit for accretion disk sizes using the JAVELIN Thin Disk model. These new measurements include disks around black holes with masses as small as $\sim 10^7$ $M_{\odot }$, which have equivalent sizes at 2500Å\, as small as $\sim 0.1$ light days in the rest frame. We find that most objects have accretion disk sizes consistent with the prediction of the standard thin disk model when we take disk variability into account. We have also simulated the expected yield of accretion disk measurements under various observational scenarios for the Large Synoptic Survey Telescope Deep Drilling Fields. We find that the number of disk measurements would increase significantly if the default cadence is changed from three days to two days or one day.

33 pages, 24 figures

References in corpus (51)

• Astropy: A Community Python Package for Astronomy
• Binary companions of evolved stars in APOGEE DR14: Search method and catalog of ~5,000 companions
• The Man Behind the Curtain: X-rays Drive the UV through NIR Variability in the 2013 AGN Outburst in NGC 2617
• Central Masses and Broad-Line Region Sizes of Active Galactic Nuclei. II. A Homogeneous Analysis of a Large Reverberation-Mapping Database
• A Catalog of Quasar Properties from SDSS DR7
• Spectral Energy Distributions and Multiwavelength Selection of Type 1 Quasars
• The Dark Energy Camera
• The Low-Luminosity End of the Radius-Luminosity Relationship for Active Galactic Nuclei
• Are the Variations in Quasar Optical Flux Driven by Thermal Fluctuations?
• The Fifth Data Release of the Sloan Digital Sky Survey
• 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
• An Empirical Ultraviolet Template for Iron Emission in Quasars as Derived from I Zw 1
• The Dark Energy Survey Data Release 1
• Measuring the black hole masses of high redshift quasars
• The Quasar Accretion Disk Size - Black Hole Mass Relation
• The Quasar Accretion Disk Size -- Black Hole Mass Relation
• 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?
• SDSS Standard Star Catalog for Stripe 82: the Dawn of Industrial 1% Optical Photometry
• Space Telescope and Optical Reverberation Mapping Project. III. Optical Continuum Emission and Broad-Band Time Delays in NGC 5548
• Space Telescope and Optical Reverberation Mapping Project. II. Swift and HST Reverberation Mapping of the Accretion Disk of NGC 5548
• Testing thermal reprocessing in AGN accretion discs
• Kepler Observations of Rapid Optical Variability in Active Galactic Nuclei
• The Sloan Digital Sky Survey Reverberation Mapping Project: H$\alpha$ and H$\beta$ Reverberation Measurements From First-year Spectroscopy and Photometry
• Stellar Velocity Dispersion Measurements in High-Luminosity Quasar Hosts and Implications for the AGN Black Hole Mass Scale
• Quasar Accretion Disks Are Strongly Inhomogeneous
• Accretion disk reverberation with Hubble Space Telescope observations of NGC 4593: evidence for diffuse continuum lags
• The Variable Diffuse Continuum Emission of Broad Line Clouds
• Swift monitoring of NGC 4151: Evidence for a Second X-ray/UV Reprocessing
• X-ray/UV/optical variability of NGC 4593 with Swift: Reprocessing of X-rays by an extended reprocessor
• The Kepler Light Curves of AGN: A Detailed Analysis
• Microlensing Makes Lensed Quasar Time Delays Significantly Time Variable
• OzDES multi-fibre spectroscopy for the Dark Energy Survey: first-year operation and results
• Forward Global Photometric Calibration of the Dark Energy Survey
• OzDES multifibre spectroscopy for the Dark Energy Survey: Three year results and first data release
• Quantifying the Diffuse Continuum Contribution of BLR Clouds to AGN Continuum Inter-band Delays
• Quasar Accretion Disk Sizes From Continuum Reverberation Mapping From the Dark Energy Survey
• Detection of Time Lags Between Quasar Continuum Emission Bands based on Pan-STARRS Light-curves
• The Sloan Digital Sky Survey Reverberation Mapping Project: Accretion-Disk Sizes from Continuum Lags
• Continuum Reverberation Mapping of the Accretion Disks in Two Seyfert 1 Galaxies
• The case for cases B and C: intrinsic hydrogen line ratios of the broad-line region of active galactic nuclei, reddenings, and accretion disc sizes
• Quasar UV luminosity function evolution up to z=8
• CIV Black Hole Mass Measurements with the Australian Dark Energy Survey (OzDES)
• Time delay measurement of Mg II line in CTS C30.10 with SALT
• Non-Blackbody Disks Can Help Explain Inferred AGN Accretion Disk Sizes
• A Survey of Intrinsic Absorption in Active Galaxies using the Far Ultraviolet Spectroscopic Explorer
• Winds Can "Blow Up" AGN Accretion Disk Sizes
• Reconciling the Quasar Microlensing Disc Size Problem with a Wind Model of Active Galactic Nucleus
• A Study of Quasar Selection in the Dark Energy Survey Supernova fields

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• Measuring accretion disk sizes of lensed quasars with microlensing time delay in multi-band light curves
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• Expectations for time-delay measurements in active galactic nuclei with the Vera Rubin Observatory
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• Twisted quasar light curves: implications for continuum reverberation mapping of accretion disks
• Constraining AGN Torus Sizes with Optical and Mid-Infrared Ensemble Structure Functions
• Continuum optical-UV and X-ray variability of AGN: current results and future challenges
• Continuum reverberation mapping of the quasar PG 2130+099
• Latent Stochastic Differential Equations for Modeling Quasar Variability and Inferring Black Hole Properties
• The H$\alpha$ broadband photometric reverberation mapping of four Seyfert 1 galaxies
• AGN Light Echoes and the Accretion Disc Self-Gravity Limit
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• Application of the FRADO model of BLR formation to the Seyfert galaxy NGC 5548 and the first step toward determining the Hubble constant
• X-ray reverberation modelling of the continuum, optical/UV time-lags in quasars
• HALO I: Photometric continuum reverberation mapping of Fairall 9
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• Cosmological nanolensing by dense gas clouds
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