Dual supermassive black holes at close separation revealed by the Hyper Suprime-Cam Subaru Strategic Program

Abstract

The unique combination of superb spatial resolution, wide-area coverage, and deep depth of the optical imaging from the Hyper Suprime-Cam (HSC) Subaru Strategic Program is utilized to search for dual quasar candidates. Using an automated image analysis routine on 34,476 known SDSS quasars, we identify those with two (or more) distinct optical point sources in HSC images covering 796 deg^2. We find 421 candidates out to a redshift of 4.5 of which one hundred or so are more likely after filtering out contaminating stars. Angular separations of 0.6 - 4.0" correspond to projected separations of 3 - 30 kpc, a range relatively unexplored for population studies of luminous dual quasars. Using Keck-I/LRIS and Gemini-N/NIFS, we spectroscopically confirm three dual quasar systems at z < 1, two of which are previously unknown out of eight observed, based on the presence of characteristic broad emission lines in each component, while highlighting that the continuum of one object in one of the pairs is reddened. In all cases, the [OIII]5007 emission lines have mild velocity offsets, thus the joint [OIII] line profile is not double-peaked. We find a dual quasar fraction of 0.26+/-0.18% and no evidence for evolution. A comparison with the Horizon-AGN simulation seems to support the case of no evolution in the dual quasar fraction when broadly matching the quasar selection. These results may indicate a scenario in which the frequency of the simultaneous triggering of luminous quasars is not as sensitive as expected to the cosmic evolution of the merger rate or gas content of galaxies.

arXiv comment11 pages; 12 figures; Accepted for publication in The Astrophysical Journal

References in corpus (55)

• Galactic Stellar and Substellar Initial Mass Function
• Energy input from quasars regulates the growth and activity of black holes and their host galaxies
• Cosmological Hydrodynamics with Adaptive Mesh Refinement: a new high resolution code called RAMSES
• CIGALE: a python Code Investigating GALaxy Emission
• The Hyper Suprime-Cam SSP Survey: Overview and Survey Design
• Spectroscopic Target Selection in the Sloan Digital Sky Survey: The Quasar Sample
• Dancing in the dark: galactic properties trace spin swings along the cosmic web
• Discovery of a binary AGN in the ultraluminous infrared galaxy NGC 6240 using Chandra
• Second Data Release of the Hyper Suprime-Cam Subaru Strategic Program
• The Hyper Suprime-Cam Software Pipeline
• The Sloan Digital Sky Survey Quasar Catalog: Fourteenth Data Release
• Stellar SEDs from 0.3-2.5 Microns: Tracing the Stellar Locus and Searching for Color Outliers in SDSS and 2MASS
• The SDSS-III Baryon Oscillation Spectroscopic Survey: Quasar Target Selection for Data Release Nine
• Binary Quasars in the Sloan Digital Sky Survey: Evidence for Excess Clustering on Small Scales
• The cosmic evolution of massive black holes in the Horizon-AGN simulation
• The Relation Between Quasar and Merging Galaxy Luminosity Functions and the Merger-Induced Star Formation Rate of the Universe
• The Quest for Dual and Binary Supermassive Black Holes: A Multi-Messenger View
• Understanding Dual AGN Activation in the Nearby Universe
• Growing supermassive black holes in the late stages of galaxy mergers are heavily obscured
• The SDSS-IV extended Baryon Oscillation Spectroscopic Survey: Quasar Target Selection
• Galaxy Interactions Trigger Rapid Black Hole Growth: an unprecedented view from the Hyper Suprime-Cam Survey
• The mass relations between supermassive black holes and their host galaxies at 1<z<2 with HST-WFC3
• Mapping of the molecular gas inflow towards the Seyfert nucleus of NGC4051 using Gemini NIFS
• The Sloan Digital Sky Survey Quasar Lens Search. V. Final Catalog from the Seventh Data Release
• Active Galactic Nucleus Pairs from the Sloan Digital Sky Survey. I. The Frequency on ~ 5-100 kpc Scales
• The Nature of Double-Peaked [O III] Active Galactic Nuclei
• Binary Quasars at High Redshift I: 24 New Quasar Pairs at z ~ 3-4
• Origin and properties of dual and offset active galactic nuclei in a cosmological simulation at z=2
• Kiloparsec-scale Spatial Offsets in Double-peaked Narrow-line Active Galactic Nuclei. I. Markers for Selection of Compelling Dual Active Galactic Nucleus Candidates
• High-redshift major mergers weakly enhance star formation
• The Origin of Double-Peaked Narrow Lines in Active Galactic Nuclei I: Very Large Array Detections of Dual AGNs and AGN Outflows
• Chandra X-ray and Hubble Space Telescope Imaging of Optically Selected kiloparsec-Scale Binary Active Galactic Nuclei I. Nature of the Nuclear Ionizing Sources
• Dual Supermassive Black Hole Candidates in the AGN and Galaxy Evolution Survey
• A survey of dual active galactic nuclei in simulations of galaxy mergers: frequency and properties
• The X-ray to [Ne V]3426 flux ratio: discovering heavily obscured AGN in the distant Universe
• The Sloan Digital Sky Survey Quasar Lens Search. II. Statistical Lens Sample from the Third Data Release
• Late-stage galaxy mergers in COSMOS to z~1
• Chandra Observations of a 1.9 kpc Separation Double X-ray Source in a Candidate Dual AGN Galaxy at z=0.16
• Obscured AGN at z~1 from the zCOSMOS-Bright Survey I. Selection and Optical Properties of a [Ne v]-selected sample
• Spectroscopic Identification of Type 2 Quasars at Z < 1 in SDSS-III/BOSS
• Very small-scale clustering of quasars from a complete quasar lens survey
• Discovery of a close-separation binary quasar at the heart of a z~0.2 merging galaxy and its implications for low-frequency gravitational waves
• Adaptive Optics Imaging of QSOs with Double-Peaked Narrow Lines: Are they Dual AGNs?
• The abundances and properties of Dual AGN and their host galaxies in the EAGLE simulations
• A treatment procedure for Gemini North/NIFS data cubes: application to NGC 4151
• Buried Black Hole Growth in IR-selected Mergers: New Results from Chandra
• Clustering on very small scales from a large sample of confirmed quasar pairs: Does quasar clustering track from Mpc to kpc scales?
• Discovery of a dual active galactic nucleus with ~ 8 kpc separation
• Exploring the brighter fatter effect with the Hyper Suprime-Cam
• Disclosing the properties of low-redshift dual AGN through XMM-Newton and SDSS spectroscopy
• Subaru Adaptive-optics High-spatial-resolution Infrared K- and L'-band Imaging Search for Deeply Buried Dual AGNs in Merging Galaxies
• Active Galactic Nucleus Pairs from the Sloan Digital Sky Survey. III. Chandra X-ray Observations Unveil Obscured Double Nuclei
• Wavelength Dependent PSFs and their impact on Weak Lensing Measurements
• Two Close-Separation Quasar-Quasar Pairs in the Large Bright Quasar Survey
• LBQS 0103-2753: A Binary Quasar in a Major Merger

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• Unveiling the population of dual- and lensed- AGNs at sub-arcsec separations
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• A Survey for High-redshift Gravitationally Lensed Quasars and Close Quasars Pairs. I. the Discoveries of an Intermediately-lensed Quasar and a Kpc-scale Quasar Pair at $z\sim 5$
• Enhanced star formation in $z\sim 6$ quasar companions
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• A Big Red Dot: Scattered light, host galaxy signatures and multi-phase gas flows in a luminous, heavily reddened quasar at cosmic noon
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• The Messy Nature of Fiber Spectra: Star-Quasar Pairs Masquerading as Dual Type 1 AGNs
• Strange Quasar Candidates with Abnormal Astrometric Characteristics from Gaia EDR3 and SDSS (SQUAB-II): Optical Identifications
• Optical Spectroscopy of Dual Quasar Candidates from the Subaru HSC-SSP program
• A meeting at z~3: Young massive galaxies and an AGN within 30kpc of the luminous QSO LBQS0302-0019
• Search for Quasar Pairs with $Gaia$ Astrometric Data. I. Method and Candidates
• Where's Swimmy?: Mining unique color features buried in galaxies by deep anomaly detection using Subaru Hyper Suprime-Cam data
• Spectroscopic confirmation of dual and offset quasars from the Subaru HSC-SSP program
• Merger fraction in galaxy groups and clusters at z < 0.2: A non-parametric morphological study with Subaru Hyper Suprime-Cam
• Quasar clustering at redshift 6
• Dual AGN in the Horizon-AGN simulation and their link to galaxy and massive black hole mergers, with an excursus on multiple AGN