Dwarf AGNs from Variability for the Origins of Seeds (DAVOS): Optical Variability of Broad-line Dwarf AGNs from the Zwicky Transient Facility

Abstract

We study the optical variability of a sample of candidate low-mass (dwarf ang Seyfert) active galactic nuclei (AGNs) using Zwicky Transient Facility g-band light curves. Our sample is compiled from broad-line AGNs in dwarf galaxies reported in the literature with single-epoch virial black hole (BH) masses in the range $M_{\mathrm{BH}}\sim 10^4$--$10^8{M}_{\odot }$. We measure the characteristic ``damping'' timescale of the optical variability ${\tau }_{\mathrm{DRW}}$, beyond which the power spectral density flattens, of a final sample of 79 candidate low-mass AGNs with high-quality light curves. Our results provide further confirmation of the $M_{\mathrm{BH}}-{\tau }_{\mathrm{DRW}}$ relation from Burke et al. 2022 within $1\sigma$ agreement, adding 78 new low-mass AGNs to the relation. The agreement suggests that the virial BH mass estimates for these AGNs are generally reasonable. We expect that the optical light curve of an accreting intermediate-mass black hole (IMBH) to vary with a rest-frame damping timescale of $\sim$ tens of hours, which could enable detection and direct mass estimation of accreting IMBHs in wide-field time-domain imaging surveys with sufficient cadence like with the Vera C. Rubin Observatory.

arXiv comment9 pages plus 6 appendix, 7 figures

References in corpus (50)

• emcee: The MCMC Hammer
• The Sloan Digital Sky Survey: Technical Summary
• The Seventh Data Release of the Sloan Digital Sky Survey
• Coevolution (Or Not) of Supermassive Black Holes and Host Galaxies
• The Host Galaxies and Classification of Active Galactic Nuclei
• The Zwicky Transient Facility: System Overview, Performance, and First Results
• GW190521: A Binary Black Hole Merger with a Total Mass of $150M_{\odot }$
• Some Aspects of Measurement Error in Linear Regression of Astronomical Data
• The Zwicky Transient Facility: Data Processing, Products, and Archive
• Fast and scalable Gaussian process modeling with applications to astronomical time series
• Relations Between Central Black Hole Mass and Total Galaxy Stellar Mass in the Local Universe
• Estimating Black Hole Masses in Active Galaxies Using the Halpha Emission Line
• Are the Variations in Quasar Optical Flux Driven by Thermal Fluctuations?
• Formation of Supermassive Black Holes
• Intermediate-Mass Black Holes
• Modeling the Time Variability of SDSS Stripe 82 Quasars as a Damped Random Walk
• The Assembly of the First Massive Black Holes
• Dwarf Galaxies with Optical Signatures of Active Massive Black Holes
• Resolved stellar mass maps of galaxies. I: method and implications for global mass estimates
• An Intermediate-mass Black Hole of Over 500 Solar Masses in the Galaxy ESO 243-49
• A New Sample of Low-mass Black Holes in Active Galaxies
• Flexible and Scalable Methods for Quantifying Stochastic Variability in the Era of Massive Time-Domain Astronomical Data Sets
• Kepler Observations of Rapid Optical Variability in Active Galactic Nuclei
• A ~50,000 solar mass black hole in the nucleus of RGG 118
• Total Galaxy Magnitudes and Effective Radii from Petrosian Magnitudes and Radii
• A characteristic optical variability timescale in astrophysical accretion disks
• A Population of Bona Fide Intermediate Mass Black Holes Identified as Low Luminosity Active Galactic Nuclei
• A luminous X-ray outburst from an intermediate-mass black hole in an off-centre star cluster
• Are the Variability Properties of the Kepler AGN Light Curves Consistent with a Damped Random Walk?
• Pan-STARRS1 variability of XMM-COSMOS AGN. II. Physical correlations and power spectrum analysis
• Identifying AGNs in low-mass galaxies via long-term optical variability
• Limitations on the recovery of the true AGN variability parameters using Damped Random Walk modeling
• Accretion-induced variability links young stellar objects, white dwarfs, and black holes
• A search for optical AGN variability in 35,000 low-mass galaxies with the Palomar Transient Factory
• Multi-epoch Spectroscopy of Dwarf Galaxies with AGN Signatures: Identifying Sources with Persistent Broad H-alpha Emission
• Improving Damped Random Walk parameters for SDSS Stripe 82 Quasars with Pan-STARRS1
• Observational Signatures of High-Redshift Quasars and Local Relics of Black Hole Seeds
• Optical Variability of Quasars with 20-Year Photometric Light Curves
• The Hunt for Intermediate Mass Black Holes in the JWST Era
• Variability-selected intermediate mass black hole candidates in dwarf galaxies from ZTF and WISE
• A Uniformly Selected Sample of Low-Mass Black Holes in Seyfert 1 Galaxies. II. The SDSS DR7 Sample
• The Mass of Quasars
• Dwarf AGNs from Optical Variability for the Origins of Seeds (DAVOS): Insights from the Dark Energy Survey Deep Fields
• Introducing the Search for Intermediate-mass Black-hole In Nearby Galaxy (SIBLING) Survey
• Multi-wavelength observations of SDSS J105621.45+313822.1, a broad-line, low-metallicity AGN
• The Curious Case of PHL 293B: A Long-Lived Transient in a Metal-Poor Blue Compact Dwarf Galaxy
• Give Me a Few Hours: Exploring Short Timescales in Rubin Observatory Cadence Simulations
• A transition mass for black holes to show broad emission lines
• Dark Energy Survey Identification of A Low-Mass Active Galactic Nucleus at Redshift 0.823 from Optical Variability
• Gaussian Process regression for astronomical time-series

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