Spectral Energy Distributions and Multiwavelength Selection of Type 1 Quasars

Abstract

We present an analysis of the mid-infrared (MIR) and optical properties of type 1 (broad-line) quasars detected by the Spitzer Space Telescope. The MIR color-redshift relation is characterized to z=3, with predictions to z=7. We demonstrate how combining MIR and optical colors can yield even more efficient selection of active galactic nuclei (AGN) than MIR or optical colors alone. Composite spectral energy distributions (SEDs) are constructed for 259 quasars with both Sloan Digital Sky Survey and Spitzer photometry, supplemented by near-IR, GALEX, VLA and ROSAT data where available. We discuss how the spectral diversity of quasars influences the determination of bolometric luminosities and accretion rates; assuming the mean SED can lead to errors as large as a factor of 2 for individual quasars. Finally, we show that careful consideration of the shape of the mean quasar SED and its redshift dependence leads to a lower estimate of the fraction of reddened/obscured AGNs missed by optical surveys as compared to estimates derived from a single mean MIR to optical flux ratio.

52 pages, 24 figures (12 color), 3 tables, ApJS accepted; higher resolution accepted version available at ftp://ftp.astro.princeton.edu/gtr/flsqsos/May2506/

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• Infrared spectral energy distribution decomposition of WISE-selected, hyperluminous hot dust-obscured galaxies
• The role of relativistic jets in the heaviest and most active supermassive black holes at high redshift
• Understanding Broad Mg II Variability in Quasars with Photoionization: Implications for Reverberation Mapping and Changing-Look Quasars
• Variability Selected Low-Luminosity Active Galactic Nuclei in the 4 Ms Chandra Deep Field-South
• Observable Consequences of Merger-Driven Gaps and Holes in Black Hole Accretion Disks
• The Mid-Infrared Continua of Seyfert Galaxies
• The Nature of Optically Dull Active Galactic Nuclei in COSMOS
• New constraints on the X-ray spectral properties of type 1 AGN
• Slow blue nuclear hypervariables in PanSTARRS-1
• Highly accreting quasars: The SDSS low-redshift catalog
• Obscured AGN at 1.5 < z < 3.0 from the zCOSMOS-deep Survey I. Properties of the emitting gas in the Narrow Line Region
• The Evolution of Chemical Abundance in Quasar Broad Line Region
• The X-ray and Mid-Infrared luminosities in Luminous Type 1 Quasars
• The Most Massive Active Black-Holes at z~1.5-3.5 Have High Spins and Radiative Efficiencies
• Galaxy-scale ionised winds driven by ultra-fast outflows in two nearby quasars
• The First High Redshift Quasar from Pan-STARRS
• Subaru Mid-infrared Imaging of the Quadruple Lenses. II. Unveiling Lens Structure of MG0414+0534 and Q2237+030
• Star Formation in Luminous Quasars at 2<z<3
• Complete infrared spectral energy distributions of mm detected quasars at z>5
• Constraints on the black hole spin in the quasar SDSS J094533.99+100950.1
• Connecting the X-ray properties of weak-line and typical quasars: testing for a geometrically thick accretion disk
• Sub-parsec supermassive Binary Quasars: expectations at z<1
• Mid-Infrared Selection of Brown Dwarfs and High-Redshift Quasars
• The large area KX quasar catalogue: I. Analysis of the photometric redshift selection and the complete quasar catalogue
• The near-to-mid infrared spectrum of quasars
• SUPER I. Toward an unbiased study of ionized outflows in z~2 active galactic nuclei: survey overview and sample characterization
• Black hole mass and Eddington ratio distribution functions of X-ray selected broad-line AGNs at z~1.4 in the Subaru XMM-Newton Deep Field
• Resolving the optical emission lines of Lya blob 'B1' at z=2.38: another hidden quasar
• Optical/near-infrared selection of red QSOs: Evidence for steep extinction curves towards galactic centers?
• The mass-metallicity relation of SDSS quasars
• Initial results from a systematic search for changing-look active galactic nuclei selected via mid-infrared variability
• Coexistence of Gravitationally Bound and Radiation Driven CIV Emission Line Regions in Active Galactic Nuclei
• AGN Continuum Reverberation Mapping Based on Zwicky Transient Facility Light Curves
• High-redshift galaxies and black holes in the eyes of JWST: a population synthesis model from infrared to X-rays
• ALMA Observations of a Candidate Molecular Outflow in an Obscured Quasar
• On the origin of excess cool gas in quasar host halos
• Updating quasar bolometric luminosity corrections. II. Infrared bolometric corrections
• Overmassive black holes in dwarf galaxies out to z$\sim$0.9 in the VIPERS survey
• Host galaxies of high-redshift extremely red and obscured quasars
• Infrared spectra and photometry of complete samples of PG and 2MASS quasars
• Stratified disc wind models for the AGN broad-line region: ultraviolet, optical and X-ray properties
• Variability and the X-ray/UV ratio of active galactic nuclei. II. Analysis of a low-redshift Swift sample
• EGG: hatching a mock Universe from empirical prescriptions
• The multiwavelength properties of red QSOs -- Evidence for dusty winds as the origin of QSO reddening
• Properties of dusty tori in active galactic nuclei - II. Type 2 AGN
• Broad absorption line disappearance and emergence using multiple-epoch spectroscopy from the Sloan Digital Sky Survey
• No Redshift Evolution in the Broad Line Region Metallicity up to z=7.54: Deep NIR Spectroscopy of ULAS J1342+0928
• Time delay measurement of Mg II line in CTS C30.10 with SALT
• The Growth of Black Holes: Insights From Obscured Active Galaxies
• Tracing the Outflow of a z=0.334 FeLoBAL: New Constraints from Low-Ionization Absorbers in FBQS J1151+3822
• High metal content of highly accreting quasars
• SDSS J094533.99+100950.1 - the remarkable weak emission line quasar
• The Australia Telescope Large Area Survey: Spectroscopic Catalogue and Radio Luminosity Functions
• The Contribution of Host Galaxies to the Infrared Energy Output of $z\gtrsim 5.0$ QUASARS
• Super-Eddington QSO RX J0439.6-5311. II. Multi-wavelength Constraints on the Global Structure of the Accretion Flow
• The CIV Baldwin effect in QSOs from Seventh Data Release of the Sloan Digital Sky Survey
• The UV Properties of SDSS Selected Quasars
• A Long XMM-Newton Observation of An Extreme Narrow Line Seyfert 1: PG 1244+026
• The HELLAS2XMM survey. X. The bolometric output of luminous obscured quasars: The Spitzer perspective
• Extended X-ray Emission From a Quasar-Driven Superbubble
• The Host Galaxy and Rapidly Evolving Broad-line Region in the Changing-look Active Galactic Nucleus 1ES 1927+654
• Exploring Changing-look Active Galactic Nuclei with the Sloan Digital Sky Survey V: First Year Results
• Radio Quiet AGNs as Possible Sources of Ultra-high Energy Cosmic Rays
• The spatial clustering of ROSAT All-Sky Survey Active Galactic Nuclei IV. More massive black holes reside in more massive dark matter halos
• SDSSJ143244.91+301435.3: a link between radio-loud narrow-line Seyfert 1 galaxies and compact steep-spectrum radio sources?
• Super- and sub-Eddington accreting massive black holes: A comparison of slim and thin accretion discs through study of the spectral energy distribution
• Black Hole Masses of Intermediate-Redshift Quasars: Near Infrared Spectroscopy
• Statistical Detection of the HeII Transverse Proximity Effect: Evidence for Sustained Quasar Activity for $>$25 Million Years
• An X-ray and Multiwavelength Survey of Highly Radio-Loud Quasars at z > 4: Jet-Linked Emission in the Brightest Radio Beacons of the Early Universe
• Testing AGN outflow and accretion models with CIV and HeII emission line demographics in z=2 quasars
• No signs of star formation being regulated in the most luminous quasars at z~2 with ALMA
• Integral field spectroscopy of nearby QSOs II. The molecular gas content and condition for star formation
• Composite Spectral Energy Distributions and Infrared-Optical Colors of Type 1 and Type 2 Quasars
• Constraining the quasar radio-loud fraction at $z\sim 6$ with deep radio observations
• Subaru Telescope adaptive optics observations of gravitationally lensed quasars in the Sloan Digital Sky Survey
• A Deep Narrowband Imaging Search for CIV and He II Emission from Ly$\alpha$ Blobs
• Evidence that most type 1 AGN are reddened by dust in the host ISM
• Limits on the LyC signal from z~3 sources with secure redshift and HST coverage in the E-CDFS field
• Modeling Mid-Infrared Diagnostics of Obscured Quasars and Starbursts
• The Optical-Radio Mapping: the kinetic efficiency of Radio-Loud AGNs
• Variability and the X-ray/UV ratio of Active Galactic Nuclei
• The origin of the Far-infrared continuum of z ~ 6 quasars: a radiative transfer model for SDSS J1148+5251
• Decomposing Star Formation and Active Galactic Nucleus with Spitzer Mid-Infrared Spectra: Luminosity Functions and Co-Evolution
• The early phases of galaxy clusters formation in IR: coupling hydrodynamical simulations with GRASIL3D
• Dusty Tori of Luminous Type 1 Quasars at z \sim 2
• A near-IR study of the host galaxies of 2Jy radio sources at 0.03 < z < 0.5: I - the data
• Dust in the wind: Crystalline silicates, corundum and periclase in PG 2112+059
• Observational constraints on the co-evolution of supermassive black holes and galaxies
• Quasar Variability in the Mid-Infrared
• High redshift extremely red quasars in X-rays
• Infrared Spectral Energy Distribution and Variability of Active Galactic Nuclei: Clues to the Structure of Circumnuclear Material
• Herschel-ATLAS: Far-infrared properties of radio-loud and radio-quiet quasars
• Is there a relationship between AGN and star formation in IR-bright AGNs?
• Kinematics of CIV and [OIII] emission in luminous high-redshift quasars
• The z=0.54 LoBAL Quasar SDSS J085053.12+445122.5: I. Spectral Synthesis Analysis Reveals a Massive Outflow
• Evidence for the Thermal Sunyaev-Zel'dovich Effect Associated with Quasar Feedback
• Identification of Outflows and Candidate Dual Active Galactic Nuclei in SDSS Quasars at z=0.8-1.6
• Recoiling Massive Black Holes in Gas-Rich Galaxy Mergers
• Characterising the Far-infrared Properties of Distant X-ray Detected AGNs: Evidence for Evolution in the Infrared--X-ray Luminosity Ratio
• Hot-Dust-Poor Quasars in Mid-Infrared and Optically Selected Samples
• Time-delay measurement of MgII broad line response for the highly-accreting quasar HE 0413-4031: Implications for the MgII-based radius-luminosity relation
• Radio Jet Feedback and Star Formation in Heavily Obscured Quasars at Redshifts ~0.3-3, I: ALMA Observations
• Using [Ne V]/[Ne III] to Understand the Nature of Extreme-Ionization Galaxies
• Gas kinematics in powerful radio galaxies at z~2: Energy supply from star formation, AGN, and radio jet
• SHARC-II 350 micron Observations of Thermal Emission from Warm Dust in z>=5 Quasars
• Probing the Nature of High Redshift Weak Emission Line Quasars: A Young Quasar with a Starburst Host Galaxy
• Photometric redshift-aided classification using ensemble learning
• Synchronized Co-evolution between Supermassive Black Holes and Galaxies Over the Last Seven Billion Years as Revealed by the Hyper Suprime-Cam
• The Size-Luminosity Relationship of Quasar Narrow-Line Regions
• Multi-Epoch Observations of Extremely High-Velocity Emergent Broad Absorption
• The quasar M_bh - M_host relation through Cosmic Time I - Dataset and black hole masses
• The first high-redshift changing-look quasars
• The Ionized Absorber and Nuclear Environment of IRAS 13349+2438: Multi-wavelength insights from coordinated Chandra HETGS, HST STIS, HET, and Spitzer IRS
• HYPerluminous quasars at the Epoch of ReionizatION (HYPERION). A new regime for the X-ray nuclear properties of the first quasars
• Contribution of the accretion disk, hot corona, and obscuring torus to the luminosity of Seyfert galaxies: INTEGRAL and Spitzer observations
• The CaFe Project: Optical Fe II and Near-Infrared Ca II triplet emission in active galaxies -- simulated EWs, the co-dependence of cloud sizes and metal content
• Jet and Torus Orientations in High Redshift Radio Galaxies
• An Investigation into the Effects of Luminosity on the Mid-Infrared Spectral Energy Distributions of Radio-Quiet Quasars
• The evolution of host mass and black hole mass in QSOs from the 2dF QSO Redshift Survey
• Discovery of Radio Jets in z~2 ULIRGs with Deep 9.7um Silicate Absorption
• The phylogeny of quasars and the ontogeny of their central black holes
• An ultra-luminous quasar at z=5.363 with a ten billion solar mass black hole and a Metal-Rich DLA at z~5
• GTC Spectra of z ~ 2.3 Quasars: Comparison with Local Luminosity Analogues
• Supermassive black holes in disk-dominated galaxies outgrow their bulges and co-evolve with their host galaxies
• Updated measurements of the dark matter halo masses of obscured quasars with improved WISE and Planck data
• CLOUDY view of the warm corona
• On the Formation of Molecular Clumps in QSO Outflows
• AGN and their host galaxies in the local Universe: two mass independent Eddington ratio distribution functions characterize black hole growth
• The Nature of Transition Blazars
• Metallicity in Quasar Broad Line Regions at Redshift $\sim$ 6
• The Sloan Digital Sky Survey Reverberation Mapping Project: the CIV Blueshift, Its Variability, and Its Dependence Upon Quasar Properties
• On the cool gaseous haloes of quasars
• OzDES Reverberation Mapping Program: The first Mg II lags from five years of monitoring
• The X-ray/UV ratio in Active Galactic Nuclei: dispersion and variability
• Monitoring the Variability of Intrinsic Absorption Lines in Quasar Spectra
• Fundamental differences in the radio properties of red and blue quasars: Insight from the LOFAR Two-metre Sky Survey (LoTSS)
• Infrared signature of active massive black holes in nearby dwarf galaxies
• The Spectral Energy Distributions of Active Galactic Nuclei
• The Contribution of z<6 Sources to the Spatial Coherence in the Unresolved Cosmic near-Infrared and X-ray Backgrounds
• The 500 ks Chandra observation of the z = 6.31 QSO SDSS J1030+0524
• Detections of CO Molecular Gas in 24um-Bright ULIRGs at z~2 in the Spitzer First Look Survey
• Discovery of a Candidate Binary Supermassive Black Hole in a Periodic Quasar from Circumbinary Accretion Variability
• Herschel Far-Infrared Photometry of the Swift Burst Alert Telescope Active Galactic Nuclei Sample of the Local Universe. II. SPIRE Observations
• Spectral Energy Distributions of Type 1 AGN in XMM-COSMOS Survey II - Shape Evolution
• The Chandra view of the relation between X-ray and UV emission in quasars
• Super-Eddington Accretion in the WISE-Selected Extremely Luminous Infrared Galaxy W2246-0526
• The Spectral Energy Distributions of Active Galactic Nuclei
• The origin of radio emission in broad absorption line quasars: Results from the LOFAR Two-metre Sky Survey
• Understanding AGN-Host Connection in Partially Obscured Active Galactic Nuclei. Part I: The Nature of AGN+HII Composites
• Blazar candidates beyond redshift 4 observed with GROND
• Overmassive black holes at cosmic noon: linking the local and the high-redshift Universe
• What can we learn about quasars from alpha_OX measurements in galactic black hole binaries?
• What makes red quasars red? Observational evidence for dust extinction from line ratio analysis
• A Population of Dust-Rich Quasars at z ~ 1.5
• Constraining the dynamical importance of hot gas and radiation pressure in quasar outflows using emission line ratios
• X-ray observational signature of a black hole accretion disc in an active galactic nucleus RXJ1633+4718
• Spectropolarimetry of High Redshift Obscured and Red Quasars
• Stellar Populations of UV-Selected Active Galactic Nuclei Host Galaxies at z ~ 2 - 3
• Completing the Census of AGN in GOODS-S/HUDF: New Ultra-Deep Radio Imaging and Predictions for JWST
• Spitzer Space Telescope Measurements of Dust Reverberation Lags in the Seyfert 1 Galaxy NGC 6418
• Obscured GOODS AGN and Their Host Galaxies at z < 1.25: The Slow Black Hole Growth Phase
• Testing the disk-corona interplay in radiatively-efficient broad-line AGN
• Extreme quasars at high redshift
• AGN obscuration from winds: from dusty infrared-driven to warm and X-ray photoionized
• The Close AGN Reference Survey (CARS): IFU survey data and the BH mass dependence of long-term AGN variability
• Giant scattering cones in obscured quasars
• High Jet Efficiency and Simulations of Black Hole Magnetospheres
• Blue outliers among intermediate redshift quasars
• AGN spectral states from simultaneous UV and X-ray observations by XMM-Newton
• Infrared Classification and Luminosities For Dusty AGN and the Most Luminous Quasars
• The High A(V) Quasar Survey: Reddened quasi-stellar objects selected from optical/near-infrared photometry - II
• Sweeping Away the Mysteries of Dusty Continuous Winds in AGN
• Fast Outflows in Hot Dust-Obscured Galaxies with Keck/NIRES
• CIV Emission and the Ultraviolet through X-ray Spectral Energy Distribution of Radio-Quiet Quasars
• Secularly powered outflows from AGN: the dominance of non-merger driven supermassive black hole growth
• On the Lx-L6micron ratio as a diagnostic for Compton-thick AGN
• The Near and Mid-infrared photometric properties of known redshift $z\ge 5$ Quasars
• The Physical Properties of Low Redshift FeLoBAL Quasars. I. Spectral Synthesis Analysis of the BAL Outflows using $SimBAL$
• Star formation and black hole growth at z=4.8
• Radiative Efficiency of Disk Accretion in Individual SDSS QSOs
• The WISSH Quasars Project IV. BLR versus kpc-scale winds
• The AKARI 2.5-5.0 Micron Spectral Atlas of Type-1 Active Galactic Nuclei: Black Hole Mass Estimator, Line Ratio, and Hot Dust Temperature
• A quasar-galaxy merger at $z\sim 6.2$: black hole mass and quasar properties from the NIRSpec spectrum
• JWST MIRI Flight Performance: Imaging
• An Extreme X-ray Variability Event of a Weak-Line Quasar
• The rise and fall of the iron-strong nuclear transient PS16dtm
• SDSS J013127.34-032100.1: a candidate blazar with a 11 billion solar mass black hole at $z$=5.18
• Exploring the link between C IV outflow kinematics and sublimation-temperature dust in quasars
• Spectral Classification and Ionized Gas Outflows in $z\sim 2$ WISE-Selected Hot Dust-Obscured Galaxies
• The nature of the intranight variability of radio-quiet quasars
• The spectral energy distribution of the redshift 7.1 quasar ULAS J1120+0641
• High-redshift Extreme Variability Quasars from Sloan Digital Sky Survey Multi-Epoch Spectroscopy
• A Herschel Study of 24 micron-Selected AGNs and Their Host Galaxies
• Mid-infrared spectroscopy of high-redshift obscured quasars
• The [OIII] profiles of infrared-selected active galactic nuclei: More powerful outflows in the obscured population
• The Optical and Near-Infrared Properties of 2837 Quasars in the UKIRT Infrared Deep Sky Survey (UKIDSS)
• Masses and Accretion Rates of Supermassive Black Holes in Active Galactic Nuclei from the INTEGRAL Survey
• Challenging the AGN scenario for JWST/NIRSpec LRD and non-LRD broad H$\alpha$ emitters in light of non-detection of NIRCam photometric variability and X-ray
• Imaging Extended Emission-Line Regions of Obscured AGN with the Subaru Hyper Suprime-Cam Survey
• The HELLAS2XMM survey. XIII. Multi-component analysis of the spectral energy distribution of obscured AGN
• SDSS J013127.34$-$032100.1: A newly discovered radio-loud quasar at $z=5.18$ with extremely high luminosity
• The Covering Factor of Warm Dust in Quasars: View from WISE All-Sky Data Release
• SDSS 0956+5128: A Broad-line Quasar with Extreme Velocity Offsets
• Exploring X-ray and radio emission of type 1 AGN up to z ~ 2.3
• The Canada-France High-z Quasar Survey: 1.2mm Observations
• The Origin and Evolution of \civ Baldwin Effect in QSOs from the Sloan Digital Sky Survey
• The Subaru/XMM-Newton Deep Survey (SXDS) - V. Optically Faint Variable Object Survey
• Ultraviolet Continuum Color Variability of Luminous Sloan Digital Sky Survey QSOs
• SDSS-IV/SPIDERS: A Catalogue of X-Ray Selected AGN Properties; Spectral Properties and Black Hole Mass Estimates for SPIDERS SDSS DR14 Type 1 AGN
• The fraction and kinematics of broad absorption line quasars across cosmic time
• A Catalog of Host Galaxies for WISE-Selected AGN: Connecting Host Properties with Nuclear Activity and Identifying Contaminants
• Chemical evolution of the Universe at 0.7 < z < 1.6 derived from abundance diagnostics of the broad-line region of quasars
• An Infrared Comparison of Type-1 and Type-2 Quasars
• The WISE-2MASS Survey: Red Quasars Into the Radio Quiet Regime
• A multi-epoch spectroscopic study of the BAL quasar APM 08279+5255 II. Emission- and absorption-line variability time lags
• Rapid Luminosity Decline and Subsequent Reformation of the Innermost Dust Distribution in the Changing-look AGN Mrk 590
• Kiloparsec-scale AGN Outflows and Feedback in Merger-Free Galaxies
• The High-z Quasar Hubble Diagram
• The extended High A(V) Quasar Survey: Searching for dusty absorbers toward mid-infrared selected quasars
• Interpretation of Departure from the Broad Line Region Scaling in Active Galactic Nuclei
• The Revealing Dust: Mid-Infrared Activity in Hickson Compact Group Galaxy Nuclei
• Correlations of the IR Luminosity and Eddington Ratio with a Hard X-ray Selected Sample of AGN
• The Dusty Heart of NGC 4151 Revealed by $\lambda \sim$1-40 $\mu$m Reverberation Mapping and Variability: A Challenge to Current Clumpy Torus Models
• A Quasar-Galaxy Mixing Diagram: Quasar Spectral Energy Distribution Shapes in the Optical to Near-Infrared
• A Quasar Catalog with Simultaneous UV, Optical and X-ray Observations by Swift
• Dwarf AGNs from Variability for the Origins of Seeds (DAVOS): Intermediate-mass black hole demographics from optical synoptic surveys
• Herschel/PACS far-infrared photometry of two z>4 quasars
• Herschel observed Stripe 82 quasars and their host galaxies: connections between the AGN activity and the host galaxy star formation
• On the Jet Production Efficiency in a Sample of the Youngest Radio Galaxies
• Near-IR spectroscopy of luminous LoBAL quasars at 1<z<2.5
• A panchromatic view of infrared quasars: excess star formation and radio emission in the most heavily obscured systems
• Lighthouse in the Dust: Infrared Echoes of Periodic Emission from Massive Black Hole Binaries
• Radiation pressure confinement -- V. The predicted free-free absorption and emission in active galactic nuclei
• Constraints on black hole duty cycles and the black hole-halo relation from SDSS quasar clustering
• MOIRCS Deep Survey III: Active Galactic Nuclei in Massive Galaxies at z=2-4
• An 80-kpc Lyman-alpha halo around a high redshift type-2 QSO
• Modeling accretion disk emission with generalized temperature profile and its effect on AGN spectral energy distribution
• The Past and Future of Mid-Infrared Studies of AGN
• Black-hole masses, accretion rates and hot- and cold-mode accretion in radio galaxies at z~1
• Welcome to the Twilight Zone: The Mid-Infrared Properties of Poststarburst Galaxies
• The Ubiquity of Supermassive Black Holes in the Hubble Sequence
• Physical Properties of Luminous Dust Poor Quasars
• Scatter Analysis Along the Multidimensional Radius-Luminosity Relations for Reverberation-Mapped Mg II Sources
• Exploring the Diversity of Type 1 Active Galactic Nuclei Identified in SDSS-IV/SPIDERS
• The Star-forming Main Sequence of the Host Galaxies of Low-redshift Quasars
• Location and energetics of the ultra-fast outflow in PG 1448+273
• Integral field spectroscopy of type-II QSOs at z=0.3-0.4
• First HETDEX Spectroscopic Determinations of Ly$\alpha$ and UV Luminosity Functions at $z=2-3$: Bridging a Gap Between Faint AGN and Bright Galaxies
• Constraining the quasar population with the broad-line width distribution
• The Ultraviolet-to-Mid-Infrared Spectral Energy Distribution of Weak Emission Line Quasars
• Survey of Extremely High-velocity Outflows in Sloan Digital Sky Survey Quasars
• Active Galactic Nuclei as seen by the Spitzer Space Telescope
• Subaru High-z Exploration of Low-Luminosity Quasars (SHELLQs) XII. Extended [C II] Structure (Merger or Outflow) in a z = 6.72 Red Quasar
• Dust reverberation mapping in the era of big optical surveys and its cosmological application
• Hubble Space Telescope Imaging of the Active Dwarf Galaxy RGG 118
• Disk-Jet Connection in Active Supermassive Black Holes in the Standard Accretion Disk Regime
• The relative growth of Optical and Radio Quasars in SDSS
• Discovery of intergalactic bridges connecting two faint $z\sim 3$ quasars
• The Dust-to-Gas Ratio and the Role of Radiation Pressure in Luminous, Obscured Quasars
• Comparison of hard X-ray spectra of luminous radio galaxies and their radio-quiet counterparts
• Discovery of the most ultra-luminous QSO using Gaia, SkyMapper and WISE
• X-ray observations of highly obscured 9.7 micron sources: an efficient method for selecting Compton-thick AGN ?
• Supermassive Black Holes in the Early Universe
• Demographics of z ~ 6 Quasars in the Black Hole Mass-Luminosity Plane
• Ionized Outflows in Nearby Quasars are Poorly Coupled to their Host Galaxies
• The Role of Star-Formation and AGN in Dust Heating of z=0.3-2.8 Galaxies - II. Informing IR AGN fraction estimates through simulations
• Enhanced Star Formation Efficiency in the Central Regions of Nearby Quasars Hosts
• A novel black-hole mass scaling relation based on coronal gas, and its dependence with the accretion disc
• Faint AGNs Favor Unexpectedly Long Inter-band Time Lags
• Modeling Quasar UV/Optical Variability with the Corona-heated Accretion-disk Reprocessing (CHAR) Model
• Prior-Informed AGN-Host Spectral Decomposition Using PyQSOFit
• J004457+4123 (Sharov 21): not a remarkable nova in M31 but a background quasar with a spectacular UV flare
• Spectral Energy Distribution of Hyper-Luminous Infrared Galaxies
• Outflows, Shocks and Coronal Line Emission in a Radio-Selected AGN in a Dwarf Galaxy
• Quantifying the Thermal Sunyaev-Zel'dovich Effect and Excess Millimeter Emission in Quasar Environments
• On the efficiency of jet production in FR II radio galaxies and quasars
• Towards a New Standard Model for Black Hole Accretion
• An Extragalactic Spectroscopic Survey of the SSA22 Field
• An FMOS Survey of moderate-luminosity broad-line AGN in COSMOS, SXDS and E-CDF-S
• The Farthest Quasar Mini-BAL Outflow from its Central Source: VLT/UVES Observation of SDSSJ0242+0049
• Photometric Classification of quasars from RCS-2 using Random Forest
• Reaching the Peak of the quasar spectral energy distribution - II. Exploring the accretion disc, dusty torus and host galaxy
• Downsizing of supermassive black holes from the SDSS quasar survey
• Extended narrow-line emission in the bright Seyfert 1.5 galaxy HE 2211-3903
• Gas reservoir of a hyper-luminous QSO at z=2.6
• Spectroscopy of QUBRICS quasar candidates: 1672 new redshifts and a Golden Sample for the Sandage Test of the Redshift Drift
• Radio-mode feedback in local AGNs: dependence on the central black hole parameters
• ALMA observations of a z~3.1 Protocluster: Star Formation from Active Galactic Nuclei and Lyman-Alpha Blobs in an Overdense Environment
• Do the spectral energy distributions of type 1 AGN show diversity?
• 3C 57 as an Atypical Radio-Loud Quasar: Implications for the Radio-Loud/Radio-Quiet Dichotomy
• Dust Destruction by Drift-Induced Sputtering in Active Galactic Nuclei
• The WISSH quasars project XI. The mean Spectral Energy Distribution and Bolometric Corrections of the most luminous quasars
• The post-Herschel view of intrinsic AGN emission: constructing templates for galaxy and AGN emission at IR wavelengths
• A Multiwavelength Study of Binary Quasars and Their Environments
• Reverberation Mapping of the Intermediate Mass Nuclear Black Hole in SDSS J114008.71+030711.4
• The Assembly of Black Hole Mass and Luminosity Functions of High-redshift Quasars via Multiple Accretion Episodes
• An extinction free AGN selection by 18-band SED fitting in mid-infrared in the AKARI NEP deep field
• The Cosmic History of Black Hole Growth from Deep Multiwavelength Surveys
• Alive but Barely Kicking: News from 3+ years of Swift and XMM-Newton X-ray Monitoring of Quasi-Periodic Eruptions from eRO-QPE1
• Downsizing of supermassive black holes from the SDSS quasar survey (II). Extension to z~4
• Unshifted Metastable He I* Mini-Broad Absorption Line System in the Narrow Line Type 1 Quasar SDSS J080248.18$+$551328.9
• On the Connection between Supermassive Black Hole and Galaxy Growth in the Reionization Epoch
• Do Radio Active Galactic Nuclei Reflect X-ray Binary Spectral States?
• The Reddest DR3 SDSS/XMM Quasars
• Chemical enrichment and accretion of nitrogen-loud quasars
• Cosmic Near-infrared Background Tomography with SPHEREx Using Galaxy Cross-correlations
• Observational Constraints on Correlated Star Formation and Active Galactic Nuclei in Late-Stage Galaxy Mergers
• Potential signature of Population III pair-instability supernova ejecta in the BLR gas of the most distant quasar at z = 7.54
• Analysis of Spitzer-IRS spectra of hyperluminous infrared galaxies
• Supermassive Black Hole Winds in X-rays -- SUBWAYS. III. A population study on ultra-fast outflows
• A new method to obtain the Broad Line Region size of high redshift quasars
• The accretion of a solar mass per day by a 17-billion solar mass black hole
• Optical and infrared properties of active galactic nuclei in the Lockman Hole
• A blazar in the epoch of reionization
• WISE detections of known QSOs at redshifts greater than six
• Intermittent AGN episodes drive outflows with a large spread of observable loading factors
• Hyperluminous starburst gives up its secrets
• The spectral energy distribution of the hyperluminous, hot dust-obscured galaxy W2246$-$0526
• Quasi-stellar objects in the ALHAMBRA survey. I. Photometric redshift accuracy based on a 23 optical-NIR filter photometry
• Accretion Disk Temperatures of QSOs: Constraints from the Emission Lines
• Directly tracing cool filamentary accretion over >100 kpc into the interstellar medium of a quasar host at z=1
• High Eddington quasars as discovery tools: current state and challenges
• The Nature of LoBAL QSOs: I. SEDs and mid-infrared spectral properties
• High Metal Content of Highly Accreting Quasars: Analysis of an Extended Sample
• Spatially Resolving the Kinematics of the <100 μas Quasar Broad Line Region using Spectroastrometry
• A Glimpse at Quasar Host Galaxy Far-UV Emission, Using DLAs as Natural Coronagraphs
• Blazar 3C 454.3 in Outburst and Quiescence During 2005-2007: Two Variable Synchrotron Emission Peaks
• The Frequency of Intrinsic X-ray Weakness Among Broad Absorption Line Quasars
• The Gaseous Environments of Quasars: Associate Absorption Lines with Density and Distance Constraints
• Discovery and origins of giant optical nebulae surrounding quasar PKS 0454-22
• NuSTAR and Keck Observations of Heavily Obscured Quasars Selected by WISE
• Universality in the Random Walk Structure Function of Luminous Quasi-Stellar Objects
• The Hunt for Red Quasars: Luminous Obscured Black Hole Growth Unveiled in the Stripe 82 X-ray Survey
• The Binary Black Hole Model for Mrk 231 Bites the Dust
• H-AMR FORGE'd in FIRE I: Magnetic state transitions, jet launching and radiative emission in super-Eddington, highly magnetized quasar disks formed from cosmological initial conditions
• An extremely X--ray weak blazar at z=5
• A Joint Model of the X-ray And Infrared Extragalactic Backgrounds: I. Model Construction And First Results
• The evolution of dusty torus covering factor in quasars
• The Accretion History of AGN: A Newly Defined Population of Cold Quasars
• Systematically smaller single-epoch quasar black hole masses using a radius-luminosity relationship corrected for spectral bias
• Far-IR Emission From Dust-Obscured Galaxies
• Mid-infrared Variability of Low-redshift Active Galactic Nuclei : Constraints on a Hot Dust Component with a Variable Covering Factor
• Connecting radio emission to AGN wind properties with Broad Absorption Line Quasars
• Difficulties in Mid-Infrared selection of AGN in dwarf galaxies
• A note on black hole masses estimated by the second moment in Narrow Line Seyfert 1 Galaxies
• Quenching of supermassive black hole growth around the apparent maximum mass
• Locating Star-Forming Regions in Quasar Host Galaxies
• Broadband spectral energy distributions of SDSS-selected quasars and of their host galaxies: intense activity at the onset of AGN feedback
• Spectral Energy Distributions of Candidate Periodically-Variable Quasars: Testing the Binary Black Hole Hypothesis
• The Extreme Super-Eddington NLS1 RX J0134.2-4258 -- II. A Weak-Line Seyfert Linking to the Weak-Line Quasar
• The underlying driver for the \civ Baldwin effect in QSOs with $0<z<5$
• Ubiquitous radio emission in quasars: predominant AGN origin and a connection to jets, dust and winds
• The radio properties of the JWST-discovered AGN
• Black Hole and Galaxy Coevolution in Moderately Luminous Active Galactic Nuclei at z~1.4 in SXDF
• Accretion properties of X-ray AGN: Evidence for radiation-regulated obscuration with redshift-dependent host galaxy contribution
• Relation between the variations in the MgII $\lambda 2798$ emission-line and the 3000 Å continuum
• The NIR to UV continuum of radio loud vs. radio quiet quasars
• SCUBA2 High Redshift Bright Quasar Survey: Far-infrared Properties and Weak-line Features
• Suzaku Observations of Three FeLoBAL QSOs, SDSS J0943+5417, J1352+4239, and J1723+5553
• ALMA and MUSE observations reveal a quiescent multi-phase circumgalactic medium around the z~3.6 radio galaxy 4C 19.71
• The z=0.54 LoBAL Quasar SDSS J085053.12+445122.5: II. The Nature of Partial Covering in the Broad-Absorption-Line Outflow
• Discovery of strong Balmer line absorption in two luminous LoBAL quasars at z~1.5
• Simulations Find Our Accounting of Dust-Obscured Star Formation May Be Incomplete
• Constraints on accretion disk size in the massive type 1 quasar PG 2308+098 from optical continuum reverberation lags
• Active Galactic Nuclei with Double-Peaked Balmer Lines: I. Black Hole Masses and the Eddington ratios
• Fantastic Fits with fantasy of Active Galactic Nuclei Spectra -- Exploring the Fe II emission near the H$\alpha$ line
• Comparison of SEDs of very massive radio-loud and radio-quiet AGN
• X-ray emission from a rapidly accreting narrow-line Seyfert 1 galaxy at z=6.56
• A systematic search for hidden type 1 AGNs: gas kinematics and scaling relations
• Extreme Variability in a Broad Absorption Line Quasar
• Flares in the changing look AGN Mrk 590. I: The UV response to X-ray outbursts suggests a more complex reprocessing geometry than a standard disk
• An intrinsic link between long-term UV/optical variations and X-ray loudness in quasars
• The Nature of Obscuration in AGN: I. Insights from Host Galaxies
• A Wide and Deep Exploration of Radio Galaxies with Subaru HSC (WERGS). IV. Rapidly Growing (Super-)Massive Black Holes in Extremely Radio-Loud Galaxies
• Unveiling the Intrinsic X-ray Properties of Broad Absorption Line Quasars with a Relatively Unbiased Sample
• Infrared colour properties of nearby radio-luminous galaxies
• What powers Hyperluminous Infrared galaxies at z~1-2?
• Ensemble power spectral density of SDSS quasars in UV/optical bands
• The central engine of the highest redshift blazar
• Variability-selected low-luminosity active galactic nuclei candidates in the 7 Ms Chandra Deep Field-South
• The rest-frame ultraviolet properties of radio-loud broad absorption line quasars
• The Spectra of IceCube Neutrino (SIN) candidate sources -- V. Modeling and interpretation of multiwavelength and neutrino data
• The Spitzer Extragalactic Representative Volume Survey (SERVS): The Environments of High-z SDSS Quasi-Stellar-Objects
• First Hard X-ray Observation of a Compact Symmetric Object: A Broadband X-ray Study of a radio galaxy OQ+208 with NuSTAR and Chandra
• Constraints from dwarf galaxies on black hole seeding and growth models with current and future surveys
• Application of the spine-layer jet radiation model to outbursts in the broad-line radio galaxy 3C 120
• Vanishing Absorption and Blueshifted Emission in FeLoBAL Quasars
• CircleZ: Reliable Photometric redshifts for AGN computed using only photometry from Legacy Survey Imaging for DESI
• A strongly starforming group: three massive galaxies associated with a QSO
• Estimators of Bolometric Luminosity and Black Hole Mass with Mid-infrared Continuum Luminosities for Dust-obscured Quasars: Prevalence of Dust-obscured SDSS Quasars
• Identifying quasars with astrometric and mid-infrared methods from APOP and ALLWISE
• Quasars as a tracer of large-scale structures in the distant universe
• Connection Between Mid-Infrared Emission Properties and Narrow Line Region Outflows in Type 1 Active Galactic Nuclei
• An Active Galactic Nucleus Recognition Model based on Deep Neural Network
• The Paschen Jump as a Diagnostic of the Diffuse Nebular Continuum Emission in Active Galactic Nuclei
• The Most Massive Active Galactic Nuclei at $1\lesssim z\lesssim 2$
• Misclassified type 1 AGNs in the local universe
• Mid-Infrared Selected Quasars I: Virial Black Hole Mass and Eddington Ratios
• AGNs are not that cool: revisiting the intrinsic AGN far-infrared spectral energy distribution
• The ALHAMBRA survey: Discovery of a faint QSO at z = 5.41
• The Composition and Power of the Jet of the Broad-Line Radio Galaxy 3C 120
• Quasars as Standard Candles IV. Analysis of the X-ray and UV indicators of the disc-corona relation
• A unifying evolutionary framework for infrared-selected obscured and unobscured quasar host haloes
• Conditions for direct black hole seed collapse near a radio-loud quasar 1 Gyr after the Big Bang
• Correlated time variability of multi-component high velocity outflows in J162122.54+075808.4
• Properties of X-ray selected Broad Absorption Line Quasars
• A Candidate Tidal Disruption Event in a Quasar at z=2.359 from Abundance Ratio Variability
• Ratio of black hole to galaxy mass of an extremely red dust-obscured galaxy at z = 2.52
• Optical-faint, Far-infrared-bright Herschel Sources in the CANDELS Fields: Ultra-Luminous Infrared Galaxies at z>1 and the Effect of Source Blending
• Discovery of a Lya emitting dark-cloud within z ~ 2.8 SMMJ02399-0136 system
• A Multi-Wavelength Study of Low Redshift Clusters of Galaxies I. Comparison of X-ray and Mid-Infrared Selected AGNs
• A Chandra Look at Five of the Broadest Double-Peaked Balmer-Line Emitters
• A More Efficient Search for H2O Megamaser Galaxies : The Power of the X-ray and Mid-infrared Photometry
• Identifying New X-ray Binary Candidates in M31 using Random Forest Classification
• The infrared-luminous progenitors of high-z quasars
• Variable mass accretion and failed wind explain changing look phenomena in NGC 1365
• Shedding New Light on Weak Emission-Line Quasars in the C${}_{\mathrm{IV}}$-H$\beta$ Parameter Space
• The missing FeII bump in faint JWST AGN: possible evidence for metal-poor broad-line regions at early cosmic times
• Mrk 1239: a Type-2 Counterpart of Narrow-line Seyfert-1?
• TXS 1206+549: a new $\gamma$-ray detected narrow-line Seyfert 1 galaxy at redshift 1.34?
• Detecting the Highest Redshift (z > 8) QSOs in a Wide, Near Infrared Slitless Spectroscopic Survey
• Unveiling Sizes of Compact AGN Hosts with ALMA
• Discovery of a very Lyman-$\alpha$-luminous quasar at z=6.62
• The GALEX Time Domain Survey. II. Wavelength-Dependent Variability of Active Galactic Nuclei in the Pan-STARRS1 Medium Deep Survey
• An Unobscured type II quasar candidate: SDSS J012032.19-005501.9
• Infrared Imaging of SDSS Quasars: Implications for the Quasar K correction
• Discovery of a strong ionized-gas outflow in an AKARI-selected Ultra-luminous Infrared Galaxy at z = 0.5
• CIV emission line properties and uncertainties in black hole mass estimates of z ~ 3.5 quasars
• Grain Physics and IR Dust Emission in AGN Environments
• Metal-Enriched Outflows in the Ultra-Luminous infrared Quasar Q1321+058
• Impact of stellar population synthesis choices on forward modelling-based redshift distribution estimates
• Dynamical Modeling of the CIV Broad Line Region of the $z=2.805$ Multiply Imaged Quasar SDSS J2222+2745
• MALS SALT-NOT survey of MIR-selected powerful radio-bright AGN at 0<z<3.5
• New Clues to Jet Launching: The inner disks in radio loud quasars may be more stable
• Quasars as standard candles VI: spectroscopic validation of the cosmological sample
• X-ray and multi-epoch optical/UV investigations of BAL to non-BAL quasar transformations
• Determination of supermassive black hole spins in local active galactic nuclei
• MAGIC: Muse gAlaxy Groups In Cosmos -- A survey to probe the impact of environment on galaxy evolution over the last 8 Gyr
• Constraining the AGN formation channel for detected black hole binary mergers up to z=1.5 with the Quaia catalogue
• A Candidate Dual QSO at Cosmic Noon
• Probing black hole accretion in quasar pairs at high redshift
• Individual optical variability of Active Galactic Nuclei from the MEXSAS2 sample
• Black hole mass and spin estimates of the most distant quasars
• Evidence for Fluorescent Fe II Emission from Extended Low Ionization Outflows in Obscured Quasars
• A catalog of optical to X-ray spectral energy distributions of z~2 quasars observed with Swift. I: First results
• Detecting the Orbital Motion of Nearby Supermassive Black Hole Binaries with Gaia
• The eROSITA Final Equatorial Depth Survey (eFEDS): the hard X-ray selected sample
• High-z dusty star-forming galaxies: a top-heavy initial mass function?
• Determining the fraction of reddened quasars in COSMOS with multiple selection techniques from X-ray to radio wavelengths
• The Role of Quasar Radiative Feedback on Galaxy Formation during Cosmic Reionization
• VLT/SINFONI study of black hole growth in high redshift radio-loud quasars from the CARLA survey
• More variable quasars have stronger emission lines
• Discovery of the Most-Distant Double-Peaked Emitter at z=1.369
• Investigating the nuclear properties of highly accreting active galactic nuclei with XMM-Newton
• Accretion and Obscuration in Merger-Dominated Luminous Red Quasars
• Modeling quasar accretion disc temperature profiles
• The XMM Deep Survey in the CDF-S VII. UV catalogue of the Optical Monitor observations
• Spatially resolved Lyman-$\alpha$ emission around radio bright quasars
• How does the radio enhancement of broad absorption line quasars relate to colour and accretion rate?
• X-ray obscuration from a variable ionized absorber in PG 1114+445
• A multi-wavelength survey of AGN in the XMM-LSS field: I. Quasar selection via the KX technique
• Multi-line assessment of narrow-line regions in $z\sim$ 3 radio galaxies
• Optical spectroscopy of SDSS J004054.65-0915268: three possible scenarios for the classification. A z \sim 5 BL Lacertae, blue FSRQ or a weak emission line quasar
• The Evolution of the Low-Frequency Radio AGN Population to $z\simeq 1.5$ in the ELAIS N1 Field
• Lack of Correlations between Cold Molecular Gas and AGN Properties in Type 1 AGNs at $z\lesssim 0.5$
• Characterizing Quasars in the Mid-infrared: High Signal-to-Noise Spectral Templates
• Main trends of the quasar main sequence -- effect of viewing angle
• AGN jets versus accretion as reionization sources
• A Generative Model for Quasar Spectra
• Discovery of a Low-Redshift Hot Dust-Obscured Galaxy
• The physical driver of the optical Eigenvector 1 in Quasar Main Sequence
• The Circumgalactic Medium of Submillimeter Galaxies. II. Unobscured QSOs within Dusty Starbursts and QSO Sightlines with Impact Parameters below 100 Kiloparsec
• Covering factors of the dusty obscurers in radio-loud and radio-quiet quasars
• Disentangling the AGN and Star-Formation Contributions to the Radio-X-ray Emission of Radio-Loud Quasars at 1<z<2
• Supermassive Black Hole Masses in Type II Active Galactic Nuclei with Polarimetric Broad Emission Lines
• On the peculiar properties of the narrow-line quasar PG 1543+489
• Black hole virial masses from single-epoch photometry: the miniJPAS test case
• Conditional Neural Process for non-parametric modeling of AGN light curve
• The nature of massive black hole binary candidates: II. Spectral energy distribution atlas
• Spectroastrometric Reverberation Mapping of Broad-line Regions
• Near-Infrared Spectroscopy of Quasars at z~3 and Estimates of Their Supermassive Black Hole Masses
• The X-ray Spectrum and Spectral Energy Distribution of FIRST J155633.8+351758: a LoBAL Quasar with a Probable Polar Outflow
• Submm-bright X-ray absorbed QSOs at z~2: insights into the co-evolution of AGN and star-formation
• Catalog of Candidates for Quasars at 3 < z < 5.5 Selected among X-Ray Sources from the 3XMM-DR4 Survey of the XMM-Newton Observatory
• Accretion History of AGN: Estimating the Host Galaxy Properties in X-ray Luminous AGN from z=0-3
• A Fresh Look at AGN Spectral Energy Distribution Fitting with the XMM-SERVS AGN Sample
• Evidence of a fraction of LIGO/Virgo/KAGRA events coming from active galactic nuclei
• Exploring the relationship between black hole accretion and star formation with blind mid-/far-infrared spectroscopic surveys
• Possible evolution of the circum-galactic medium around QSOs with QSO age and cosmic time revealed by Ly$\alpha$ halos
• The Luminosity and Stellar Mass Functions of Red W1-W2 Galaxies
• Relativistic plasmas in AGN jets - From synchrotron radiation to $\gamma$-ray emission
• The long-term broad-line responsivity in MKN 110
• X-raying winds in distant quasars: the first high-redshift wind duty cycle
• Characterising SMSS J2157--3602, the most luminous known quasar, with accretion disc models
• The radio luminosity, black hole mass and Eddington ratio for quasars from the Sloan Digital Sky Survey
• NGC 3147: a prototypical low-luminosity active galactic nucleus with double-peaked optical and ultraviolet lines
• Eddington Ratios of Dust-obscured Quasars at $z\lesssim 1$: Evidence Supporting Dust-obscured Quasars as Young Quasars
• Quasars as Standard Candles V. Evaluation of a $\le$ 0.06 dex intrinsic dispersion in the LX-LUV relation
• Far-Infrared Properties of Type 1 Quasars
• The Relation between X-ray and Ultraviolet Variability of Quasars
• Euclid preparation. Observational expectations for redshift z<7 active galactic nuclei in the Euclid Wide and Deep surveys
• Unveiling the quasar main sequence: illuminating the complexity of active galactic nuclei and their evolution
• SkyMapper colours of Seyfert galaxies and Changing-Look AGN
• What is the nature of Little Red Dots and what is not, MIRI SMILES edition
• Obscured AGNs in Bulgeless Hosts discovered by WISE: The Case Study of SDSS J1224+5555
• X-ray Insights into the Nature of Quasars with Redshifted Broad Absorption Lines
• An interacting galaxy pair at the origin of a light echo
• Long-term variability of the composite galaxy SDSS J103911-000057: A candidate of true Type-2 AGN
• Examining AGN UV/Optical Variability Beyond the Simple Damped Random Walk. II. Insights from 22 Years Observations of SDSS, PS1 and ZTF
• A Hubble Space Telescope Imaging Study of Four FeLoBAL Quasar Host Galaxies
• Direct Measurement of Quasar Outflow Wind Acceleration
• An Optically Faint Quasar Survey at z~5 in the CFHTLS Wide Field: Estimates of the Black Hole Masses and Eddington Ratios
• Temperature Profiles of Accretion Disks in Luminous Active Galactic Nuclei derived from Ultraviolet Spectroscopic Variability
• Very Large Array imaging rules out precessing radio jets in three DES$-$SDSS-selected candidate periodic quasars
• X-ray reverberation modelling of the continuum, optical/UV time-lags in quasars
• HYPERION. Shedding light on the first luminous quasars: A correlation between UV disc winds and X-ray continuum
• AMUSE-VIRGO. III: mid-infrared photometry of early-type galaxies and limits on obscured nuclear emission
• The near-infrared SED of blue quasars: what drives the evolution of the dusty torus?
• HYPERION: broad-band X-ray-to-near-infrared emission of Quasars in the first billion years of the Universe
• Monster radio jet (>66 kpc) observed in quasar at z$\sim$5
• AGNet: Weighing Black Holes with Deep Learning
• Tracing Quasar Narrow-Line Regions Across Redshift: A Library of High S/N Optical Spectra
• The Quasar Mass-Luminosity Plane III: Smaller Errors on Virial Mass Estimates
• Proving strong magnetic fields near to the central black hole in the quasar PG0043+039 via cyclotron lines
• Fading Light, Fierce Winds: JWST Snapshot of a Sub-Eddington Quasar at Cosmic Dawn
• The Composite Spectral Energy Distribution of Quasars is Surprisingly Universal Since Cosmic Noon
• X-ray and Multiwavelength Insights into the Inner Structure of High-Luminosity Disc-Like Emitters
• Unravelling the nature of the dual AGN in the galaxy pair system IRAS 05589+2828 and 2MASX J06021107+2828382
• The probabilistic random forest applied to the QUBRICS survey: improving the selection of high-redshift quasars with synthetic data
• The detections of inflowing gas from narrow absorption lines at the parsec scale
• A weak Ly$\alpha$ halo for an extremely bright Little Red Dot: Indications of enshrouded SMBH growth
• Measurement of the supermassive black hole masses in two active galactic nuclei by the photometric reverberation mapping method
• Demography of high redshift AGN
• The peculiar optical-UV X-ray spectra of the X-ray weak quasar PG 0043+039
• Extinction and AGN over host galaxy contrast effects on the optical spectroscopic classification of AGN
• The relationship of SMBHs and host galaxies at $z<4$ in the deep optical variability-selected AGN sample in the COSMOS field
• Gaia-assisted discovery of a detached low-ionisation BAL quasar with very large ejection velocities
• WISE Mid-Infrared Properties of compact Active Galactic Nuclei selected from the high-radio-frequency AT20G Survey
• Disc wind or disc line? The extraordinary Fe-K feature of Mrk 1513
• What is the origin of the stacked radio emission in radio-undetected quasars?: Insights from a radio-infrared image stacking analysis
• Optical Spectroscopy of Dual Quasar Candidates from the Subaru HSC-SSP program
• Inferences on relations between distant supermassive black holes and their hosts complemented by the galaxy fundamental plane
• Black hole mass of a quiescent galaxy hosting a Type 1 AGN at z=2.09: Implications for black hole - galaxy co-evolution and AGN quenching at high redshift
• Rapidly accreting black hole of the Lyα-luminous quasar PSO J006.1240+39.2219
• Evidence of under-developed torus and broad-line region of weak emission line quasars based on their spectral energy distribution
• Searching for Low-Redshift Hot Dust-Obscured Galaxies
• Viewing angle effects in quasar application to cosmology
• Spectral Energy Distribution Variations of Nearby Seyfert Galaxies During AGN Watch Monitoring Programs
• A Deep XMM-Newton Observation of the Quasar 3C 287
• Selected Chapters on Active Galactic Nuclei as Relativistic Systems
• XMM-Newton, Swift and ROSAT observations of LBQS 0102-2713
• The origin of X-ray emission in 3CRR sources: hints from mid-infrared Spitzer observations
• A Mid-infrared Flare in the Seyfert Galaxy NGC 3786: A Changing-look Event Triggered by an Obscured Tidal Disruption Event?
• The Dawn of Black Holes
• Revealing the Warm and Hot Halo Baryons via Thomson Scattering of Quasar Light
• B2 0003+38A: a classical flat-spectrum radio quasar hosted by a rotation-dominated galaxy with a peculiar massive outflow
• HALO I: Photometric continuum reverberation mapping of Fairall 9
• Selection of highly-accreting quasars: Spectral properties of FeII emitters not belonging to extreme Population A
• QSO MUSEUM III: the circumgalactic medium in Ly$\alpha$ emission around 120 $z\sim 3$ quasars covering the SDSS parameter space. Witnessing the instantaneous AGN feedback on halo scales
• Rarefied Broad-Line Regions in Active Galactic Nuclei: Anomalous Responses in Reverberation Mapping and Implications for Weak Emission-Line Quasars
• Shedding the envelope: JWST reveals a kiloparsec-scale [OIII]-weak Balmer shell around a z=7.64 quasar
• Simulations and Observations of the Microwave Universe
• A cosmological distance measure using radio-loud quasars
• The Quasar 3C 47: Extreme Population B Jetted Source With Double-peaked Profile
• Optical identification of radio-loud active galactic nuclei in the ROSAT-Green-Bank sample with SDSS spectroscopy
• Multiwavelength survey of X-ray sources in the Sculptor Dwarf Spheroidal Galaxy
• Estimate of SMBH Spin for Narrow-Line Seyfert 1 Galaxies
• Is radio jet power linearly proportional to the product of central black hole mass and Eddington ratio in AGN?
• Active Galactic Nuclei and their demography through cosmic time
• On estimators of the jet bolometric luminosity of Fermi 2LAC blazars
• Flares in the Changing Look AGN Mrk 590. II: Deep X-ray observations reveal a Comptonizing inner accretion flow
• Compact stellar systems hosting an intermediate mass black hole: magnetohydrodynamic study of inflow-outflow dynamics
• Mg II line properties in lobe-dominated quasars
• Multi-Epoch Optical Spectroscopy Variability of the Changing-Look AGN Mrk 883
• The disk-torus system in active galactic nuclei: possible evidence of highly spinning black holes
• ALMA survey of a massive node of the Cosmic Web at $z\sim 3$. II. A dynamically cold and massive disk galaxy in the proximity of a hyperluminous quasar
• Extreme Galaxy-scale Outflows Are Frequent among Luminous Early Quasars
• AGN in the ULIRG HE 0435-5304
• Exploring the quasar disc-wind-jet connection with LoTSS and SDSS
• A unique distant submillimeter galaxy with an X-ray-obscured radio-luminous active galactic nucleus
• X-ray Absorption and Reprocessing in the $z\sim 2.5$ Lensed Quasar 2MASS J1042+1641
• Red quasars: estimation of SMBH spin, mass and accretion disk inclination angle
• Determination of the Physical Parameters of AGNs in Seyfert 1 Galaxies LEDA 3095839 and VII Zw 244 Based on Spectropolarimetric Observations
• The Quasar Candidates Catalogs of DESI Legacy Imaging Survey Data Release 9
• The CaFe Project: Optical FeII and Near-Infrared Ca II triplet emission in active galaxies. II. The driver(s) of the Ca II and Fe II and its potential use as a chemical clock
• Quasar Main Sequence unfolded by 2.5D FRADO (Natural expression of Eddington ratio, black hole mass, and inclination)
• The Morphology of Dwarf Galaxies Hosting Variable Active Galactic Nuclei
• Probing AGN with spectropolarimetry: accretion disk and SMBH parameters
• Multi-phase investigation of outflows in the circumgalactic and interstellar media of luminous quasars at z~5
• JWST Spectroscopic View of a Rapidly Growing Dust-obscured Quasar at $z\sim 4$: Effect of Dust Extinction Correction on Black Hole Mass and Eddington Ratio Estimation
• Spins of SMBHs in distant low luminosity AGNs
• DEIMOS Observations of WISE-Selected, Optically Obscured AGNs
• Multiphase Powerful Outflows Detected in High-z Quasars
• The unusual spectral energy distribution of LBQS 0102-2713
• Simulations of Torus Reverberation Mapping Experiments with SPHEREx
• Early Stages of Dusty Tori: The First Infrared Spectra from a Highly Multiscale Quasar Simulation
• Past, present and Future of the Scaling Relations of Galaxies and Active Galactic Nuclei
• The Sloan Digital Sky Survey Reverberation Mapping Project: UV-Optical Accretion Disk Measurements with Hubble Space Telescope
• The rise and fall of Little Red Dots could be driven by the environment
• Transient LoBALs at high velocities: A Case of Extreme Broad Absorption Line Variability in J115636.82+085628.9
• High Signal-to-Noise Ratio Mid-Infrared Quasar Spectral Templates
• Identifying Changing-Look AGN Transitions in Light Curve Data with the Zwicky Transient Facility
• Gaia-supported re-discovery of a remarkable weak line quasar from a variability and proper motion survey
• A New Member of the Fast and Furious Family: A Relativistic and Time-Variable UV Outflow in a Luminous Quasar
• Modeling quasar variability through self-organizing map-based process
• Looking for the Wind in the Dust
• Black Hole merger rates in the first billion years in light of JWST data
• A quasar shedding its dust cocoon at redshift 2
• The dust emission of high-redshift quasars
• The Structure and Evolution of LRDs: Insights from JWST NIRSpec Medium and High Resolution Spectroscopy at $z\sim 4$
• Kiloparsec-scale imaging of the CO(1-0)-traced cold molecular gas reservoir in a z~3.4 submillimeter galaxy
• The imprint of AGN-driven outflows on the CGM: the case of Lyα nebulae around high-z quasars
• X-ray Properties of the Luminous Quasar PG 1634+706 at z = 1.337 from SRG and XMM-Newton Data
• Fast and optimal nonparametric sequential design for astronomical observations
• AGILE: an end-to-end Rubin-LSST simulation of AGNs, galaxies, and stars I. Software description and first data release
• Revealing a strongly reddened, faint active galactic nucleus population by stacking deep co-added images
• Accretion in Active Galactic Nuclei
• The possible long-term periodic variability of the extremely luminous quasar WISE J090924.01+000211.1
• Unveiling the dynamics of the ultra-fast outflow in IRAS 13224-3809 with X-ray spectroscopy
• GalSBI-SPS: a stellar population synthesis-based galaxy population model for cosmology and galaxy evolution applications
• Tips learned from panchromatic modeling of AGNs
• Optical Variability Structure Function of Low-Luminosity AGN using ATLAS Lightcurves
• Radio studies of galaxy formation: Dense Gas History of the Universe
• Estimating the spins of supermassive black holes in distant ultraluminous quasars
• The dependence of the fraction of radio luminous quasars on redshift and its theoretical implications
• Spectroscopic confirmation of dual and offset quasars from the Subaru HSC-SSP program