A Survey of z>5.8 Quasars in the Sloan Digital Sky Survey I: Discovery of Three New Quasars and the Spatial Density of Luminous Quasars at z~6

Abstract

We present the results from a survey of i-dropout objects selected from ~1550 deg^2 of multicolor imaging data from the Sloan Digital Sky Survey, to search for luminous quasars at z>5.8. Objects with i*-z*>2.2 and z*<20.2 are selected, and follow-up J band photometry is used to separate L and T type cool dwarfs from high-redshift quasars. We describe the discovery of three new quasars, at z=5.82, 5.99 and 6.28, respectively. Their spectra show strong and broad Ly alpha+NV emission lines, and very strong Ly alpha absorption, with a mean continuum decrement D_A > 0.90. The ARC 3.5m spectrum of the z=6.28 quasar shows that over a range of 300 A immediately blueward of the Ly alpha emission, the average transmitted flux is only 0.003 +/-0.020 times that of the continuum level, consistent with zero flux, and suggesting a tentative detection of the complete Gunn-Peterson trough. The existence of strong metal lines suggests early chemical enrichment in the quasar enviornment. The three new objects, together with the previously published z=5.8 quasar form a complete color-selected flux-limited sample at z>5.8. We estimate that at $z=6$, the comoving density of luminous quasars at M_1450 < -26.89 (h=0.5, Omega=1)is 1.1x10^-9 Mpc^-3. This is a factor of ~2 lower than that at z~5, and is consistent with an extrapolation of the observed quasar evolution at low-z. We discuss the contribution of quasars to the ionizing background at z~6. The luminous quasars discussed in the paper have central black hole masses of several times 10^9 M_sun by the Eddington argument. Their observed space density provides a sensitive test of models of quasar and galaxy formation at high redshift. (Abridged)

AJ in press (Dec 2001), 40 pages, 10 figures. Updated following referee report; minor changes

References in corpus (47)

• Maps of Dust IR Emission for Use in Estimation of Reddening and CMBR Foregrounds
• The Sloan Digital Sky Survey: Technical Summary
• The Demography of Massive Dark Objects in Galaxy Centres
• A Relationship Between Nuclear Black Hole Mass and Galaxy Velocity Dispersion
• The Sloan Digital Sky Survey Photometric Camera
• Mass function of dark matter halos
• A Unified Model for the Evolution of Galaxies and Quasars
• Evidence for Reionization at z ~ 6: Detection of a Gunn-Peterson Trough in a z=6.28 Quasar
• Radiative Transfer in a Clumpy Universe: III. The Nature of Cosmological Ionizing Sources
• The 2dF QSO Redshift Survey - I. The Optical QSO Luminosity Function
• Reionization of the Inhomogeneous Universe
• A Modified Magnitude System that Produces Well-Behaved Magnitudes, Colors, and Errors Even for Low Signal-to-Noise Ratio Measurements
• Elemental Abundances in QSOs: Star Formation and Galactic Nuclear Evolution at High Redshifts
• Lyman Continuum Emission from Galaxies at z~3.4
• High-Redshift Quasars Found in Sloan Digital Sky Survey Commissioning Data IV: Luminosity Function from the Fall Equatorial Stripe Sampl
• The Cosmological Constant is Back
• Cosmological Reionization by Stellar Sources
• The Discovery of a Luminous z=5.80 Quasar from the Sloan Digital Sky Survey
• What is the Highest Plausible Redshift of Luminous Quasars?
• Observational Signatures of the First Quasars
• Simulation of Stellar Objects in SDSS Color Space
• Colors of 2625 Quasars at 0<z<5 Measured in the Sloan Digital Sky Survey Photometric System
• On the Threshold of the Reionization Epoch
• The Missing Link: Early Methane ("T") Dwarfs in the Sloan Digital Sky Survey
• The Discovery of a Field Methane Dwarf from Sloan Digital Sky Survey Commissioning Data
• The Merger History of Supermassive Black Holes in Galaxies
• High-Redshift Quasars Found in Sloan Digital Sky Survey Commissioning Data
• L Dwarfs Found in Sloan Digital Sky Survey Commissioning Imaging Data
• Quasar Strömgren Spheres Before Cosmological Reionization
• The FIRST Radio-Loud Broad Absorption Line QSO and Evidence for a Hidden Population of Quasars
• The Earliest Luminous Sources and the Damping Wing of the Gunn-Peterson Trough
• The Discovery of a High-redshift Quasar without Emission Lines from Sloan Digital Sky Survey Commissioning Data
• High-Redshift Quasars Found in Sloan Digital Sky Survey Commissioning Data III: A Color Selected Sample at i^*<20 in the Fall Equatorial Stripe
• Optical and Infrared Colors of Stars Observed by 2MASS and SDSS
• A 250 GHz Survey of High Redshift QSOs from the Sloan Digital Sky Survey
• The Discovery of a Second Field Methane Brown Dwarf from Sloan Digital Sky Survey Commissioning Data
• High-Redshift Quasars Found in Sloan Digital Sky Survey Commissioning Data VI. Sloan Digital Sky Survey Spectrograph Observations
• NICMOS Imaging of the Host Galaxies of z ~ 2 - 3 Radio-Quiet Quasars
• High-Redshift Quasars Found in Sloan Digital Sky Survey Commissioning Data II: The Spring Equatorial Stripe
• High-Redshift Quasars Found in Sloan Digital Sky Survey Commissioning Data V. Hobby-Eberly Telescope Observations
• Five High-Redshift Quasars Discovered in Commissioning Imaging Data of the Sloan Digital Sky Survey
• What is the True Covering Factor of Absorbing Matter in BALQSOs?
• Determining the Redshift of Reionization From the Spectra of High-Redshift Sources
• Limits on the Gunn-Peterson Effect at z = 5
• An XMM-Newton detection of the z=5.80 X-ray weak quasar SDSSp J104433.04-012502.2
• Discovery of strong CIV absorption in the highest redshift quasar
• The Low Resolution Spectrograph of the Hobby-Eberly Telescope II. Observations of Quasar Candidates from the Sloan Digital Sky Survey

Cited by in corpus (710)

• The many lives of active galactic nuclei: cooling flows, black holes and the luminosities and colours of galaxies
• The James Webb Space Telescope
• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Likelihoods and Parameters from the WMAP data
• A luminous quasar at a redshift of z = 7.085
• Cosmology at Low Frequencies: The 21 cm Transition and the High-Redshift Universe
• Constraining the Evolution of the Ionizing Background and the Epoch of Reionization with z ~ 6 Quasars II: A Sample of 19 Quasars
• An Observational Determination of the Bolometric Quasar Luminosity Function
• The Dark Energy Survey: more than dark energy - an overview
• The Assembly and Merging History of Supermassive Black Holes in Hierarchical Models of Galaxy Formation
• A Physical Model for the Co-evolution of QSOs and of their Spheroidal Hosts
• The First Data Release of the Sloan Digital Sky Survey
• Astrometric Calibration of the Sloan Digital Sky Survey
• A unified model for AGN feedback in cosmological simulations of structure formation
• Observational constraints on Cosmic Reionization
• Formation of Supermassive Black Holes
• A Survey of z>5.7 Quasars in the Sloan Digital Sky Survey II: Discovery of Three Additional Quasars at z>6
• The Assembly of the First Massive Black Holes
• The 2dF QSO Redshift Survey - XII. The spectroscopic catalogue and luminosity function
• What Drives the Growth of Black Holes?
• Dwarf Galaxies with Optical Signatures of Active Massive Black Holes
• New Constraints on Cosmic Reionization from the 2012 Hubble Ultra Deep Field Campaign
• Near-Infrared Photometry and Spectroscopy of L and T Dwarfs: the Effects of Temperature, Clouds, and Gravity
• SkyMapper and the Southern Sky Survey
• Evolution of the Ionizing Background and the Epoch of Reionization from the Spectra of z~6 Quasars
• The Canada-France High-z Quasar Survey: nine new quasars and the luminosity function at redshift 6
• Model-independent evidence in favor of an end to reionization by z~6
• A Survey of z>5.7 Quasars in the Sloan Digital Sky Survey IV: Discovery of Seven Additional Quasars
• The Sloan Digital Sky Survey Quasar Catalog: twelfth data release
• Self-Regulated Growth of Supermassive Black Holes in Galaxies as the Origin of the Optical and X-ray Luminosity Functions of Quasars
• Distant Radio Galaxies and their Environments
• Mass Functions of the Active Black Holes in Distant Quasars from the Large Bright Quasar Survey, the Bright Quasar Survey, and the Color-Selected Sample of the SDSS Fall Equatorial Stripe
• JADES NIRSpec Spectroscopy of GN-z11: Lyman-$\alpha$ emission and possible enhanced nitrogen abundance in a $z=10.60$ luminous galaxy
• A Survey of z>5.7 Quasars in the Sloan Digital Sky Survey III: Discovery of Five Additional Quasars
• The Pan-STARRS1 distant z>5.6 quasar survey: more than 100 quasars within the first Gyr of the universe
• Clustering of High Redshift ($z\ge 2.9$) Quasars from the Sloan Digital Sky Survey
• Unusual Broad Absorption Line Quasars from the Sloan Digital Sky Survey
• The Universe is Reionizing at z~7: Bayesian Inference of the IGM Neutral Fraction Using Ly$\alpha$ Emission from Galaxies
• Low-Frequency Gravitational Waves from Massive Black Hole Binaries: Predictions for LISA and Pulsar Timing Arrays
• Escape fraction of ionizing photons during reionization: effects due to supernova feedback and runaway OB stars
• Rapid growth of high redshift black holes
• Dust emission from the most distant quasars
• The observed ionization rate of the intergalactic medium and the ionizing emissivity at z >5: Evidence for a photon starved and extended epoch of reionization
• Super-massive Black Hole Demography: the Match between the Local and Accreted Mass Functions
• The Physics of the Intergalactic Medium
• The First Cosmic Structures and their Effects
• The Final SDSS High-Redshift Quasar Sample of 52 Quasars at z>5.7
• The Romulus Cosmological Simulations: A Physical Approach to the Formation, Dynamics and Accretion Models of SMBHs
• The Bolometric Quasar Luminosity Function at z = 0-7
• The realm of the galaxy protoclusters
• Low-frequency gravitational radiation from coalescing massive black hole binaries in hierarchical cosmologies
• The Direct Detection of Lyman-Continuum Emission from Star-forming Galaxies at z~3
• Seventy-One New L and T Dwarfs from the Sloan Digital Sky Survey
• Quantitative Constraints on the Reionization History from the IGM Damping Wing Signature in Two Quasars at z > 7
• The abundance and clustering of dark haloes in the standard Lambda CDM cosmogony
• Formation of the first nuclear clusters and massive black holes at high redshift
• Formation of z ~ 6 quasars from hierarchical galaxy mergers
• Hydrogen reionisation ends by $z=5.3$: Lyman-$\alpha$ optical depth measured by the XQR-30 sample
• Discovery of three z>6.5 quasars in the VISTA Kilo-degree Infrared Galaxy (VIKING) survey
• Rapid Reionization by the Oligarchs: The Case for Massive, UV-Bright, Star-Forming Galaxies with High Escape Fractions
• The Global 21 Centimeter Background from High Redshifts
• A Redshift z = 6.56 Galaxy Behind the Cluster Abell 370
• Strangulation in Galaxy Groups
• Probing the Ionization State of the Universe at z>6
• Observational evidence for intermediate-mass black holes
• The Assembly of Supermassive Black Holes at High Redshifts
• Dissecting Photometric redshift for Active Galactic Nuclei using XMM- and Chandra-COSMOS samples
• The origins of massive black holes
• A 3x10^9 solar mass black hole in the quasar SDSS J1148+5251 at z=6.41
• Foreground simulations for the LOFAR - Epoch of Reionization Experiment
• Reionization of Hydrogen and Helium by Early Stars and Quasars
• Four quasars above redshift 6 discovered by the Canada-France High-z Quasar Survey
• Fluctuations in the High-Redshift Lyman-Werner Background: Close Halo Pairs as the Origin of Supermassive Black Holes
• X-ray emission from radio-quiet quasars in the SDSS Early Data Release. The alpha_ox dependence upon UV luminosity
• Theoretical isochrones in several photometric systems II. The Sloan Digital Sky Survey ugriz system
• Gemini Near-infrared Spectroscopy of Luminous z~6 Quasars: Chemical Abundances, Black Hole Masses, and MgII Absorption
• Inferences on the Timeline of Reionization at z~8 From the KMOS Lens-Amplified Spectroscopic Survey
• The Destruction of Bars by Central Mass Concentrations
• Radiative transfer simulations of cosmic reionization I: methodology and initial results
• Black hole masses and enrichment of z ~ 6 SDSS quasars
• Fluctuating feedback-regulated escape fraction of ionizing radiation in low-mass, high-redshift galaxies
• Evolution of the Mass Function of Dark Matter Haloes
• The z=5 Quasar Luminosity Function from SDSS Stripe 82
• Taxing the Rich: Recombinations and Bubble Growth During Reionization
• Evidence for non-evolving FeII/MgII ratios in rapidly accreting z~6 QSOs
• The Luminosity Function of Lyman Alpha Emitters at Redshift z~5.7
• Signatures of X-rays in the early Universe
• The 2dF-SDSS LRG and QSO Survey: The z<2.1 Quasar Luminosity Function from 5645 Quasars to g=21.85
• Quasars at z=6: the survival of the fittest
• The Lyman-alpha forest opacity and the metagalactic hydrogen ionization rate at z~2-4
• Early Growth and Efficient Accretion of Massive Black Holes at High Redshift
• The Contribution of High Redshift Galaxies to Cosmic Reionization: New Results from Deep WFC3 Imaging of the Hubble Ultra Deep Field
• Escape fraction of ionizing photons from high-redshift galaxies in cosmological SPH simulations
• Dark Matter Spikes and Annihilation Radiation from the Galactic Center
• Pathways to massive black holes and compact star clusters in pre-galactic dark matter haloes with virial temperatures > 10000K
• New constraints on Lyman-α opacity with a sample of 62 quasars at z > 5.7
• High-excitation CO in a quasar host galaxy at z=6.42
• A Survey of z~6 Quasars in the SDSS Deep Stripe: I. a Flux-Limited Sample at z_{AB}<21
• Galaxy Zoo: The fundamentally different co-evolution of supermassive black holes and their early- and late-type host galaxies
• The Evolution of the Broad-Line Region among SDSS Quasars
• Gemini GNIRS near-infrared spectroscopy of 50 quasars at z>~5.7
• Simulating cosmic reionization: How large a volume is large enough?
• Primordial Structure of Massive Black Hole Clusters
• The evolution of AGN across cosmic time: what is downsizing?
• The imprint of massive black hole formation models on the LISA data stream
• Feedback-regulated star formation and escape of LyC photons from mini-haloes during reionisation
• A Significantly Neutral Intergalactic Medium Around the Luminous z=7 Quasar J0252-0503
• Measurements of the UV background at 4.6 < z < 6.4 using the quasar proximity effect
• A New Signature of Dark Matter Annihilations: Gamma-Rays from Intermediate-Mass Black Holes
• Low-mass black holes as the remnants of primordial black hole formation
• Off the Beaten Path: A New Approach to Realistically Model The Orbital Decay of Supermassive Black Holes in Galaxy Formation Simulations
• Constraints on Black Hole Growth, Quasar Lifetimes, and Eddington Ratio Distributions from the SDSS Broad Line Quasar Black Hole Mass Function
• CO(1-0) in z>2 Quasar Host Galaxies: No Evidence for Extended Molecular Gas Reservoirs
• Exploring Reionization-Era Quasars III: Discovery of 16 Quasars at $6.4\lesssim z\lesssim 6.9$ with DESI Legacy Imaging Surveys and UKIRT Hemisphere Survey and Quasar Luminosity Function at $z\sim 6.7$
• A Survey of z~6 Quasars in the SDSS Deep Stripe. II. Discovery of Six Quasars at z_{AB}>21
• Impact of Reionization on the Stellar Populations of Nearby Dwarf Galaxies
• Lyman Break Galaxies and the Star Formation Rate of the Universe at z~6
• The Sloan Digital Sky Survey Quasar Catalog I. Early Data Release
• The Most Luminous Galaxies Discovered by WISE
• Feedback-regulated Super Massive Black Hole Seed Formation
• Galaxy UV-luminosity function and reionization constraints on axion dark matter
• CO(1-0) in z >/~ 4 Quasar Host Galaxies: No Evidence for Extended Molecular Gas Reservoirs
• Cosmic Reionisation by Stellar Sources: Population II Stars
• Galaxy Cores as Relics of Black Hole Mergers
• Relic keV sterile neutrinos and reionization
• Black hole growth and activity in a LambdaCDM Universe
• The Darkest Hour Before Dawn: Contributions to Cosmic Reionization from Dark Matter Annihilation and Decay
• Growing the first bright quasars in cosmological simulations of structure formation
• Testing the Evolutionary Link Between Submillimetre Galaxies and Quasars: CO Observations of QSOs at z~2
• Thermal Emission from Warm Dust in the Most Distant Quasars
• GeV Gamma-Ray Attenuation and the High-Redshift UV Background
• The nature and evolution of the highly ionized near-zones in the absorption spectra of z~6 quasars
• The SDSS Imaging Pipelines
• The critical radiation intensity for direct collapse black hole formation: dependence on the radiation spectral shape
• Chandra Detection of a TypeII Quasar at z=3.288
• The Detectability of High Redshift Lyman Alpha Emission Lines Prior to the Reionization of the Universe
• A Physical Model for the Luminosity Function of High-Redshift Quasars
• Constraints from Gravitational Recoil on the Growth of Supermassive Black Holes at High Redshift
• Simulating IGM Reionization
• EIGER I. a large sample of [OIII]-emitting galaxies at $5.3<z<6.9$ and direct evidence for local reionization by galaxies
• HI 21cm absorption beyond the epoch of re-ionization
• Recoiling Black Holes in Merging Galaxies: Relationship to AGN Lifetimes, Starbursts, and the M-sigma Relation
• Binary Quasars at High Redshift I: 24 New Quasar Pairs at z ~ 3-4
• The Black Hole - Bulge Relationship for QSOs at High Redshift
• Large fluctuations in the hydrogen-ionizing background and mean free path following the epoch of reionization
• Towards Cosmological Concordance on Galactic Scales
• Massive black hole factories: Supermassive and quasi-star formation in primordial halos
• Spectral Energy Distributions of QSOs at z>5: common AGN-heated dust and occasionally strong star-formation
• A Cross-Match of 2MASS and SDSS: Newly-Found L and T Dwarfs and an Estimate of the Space Densitfy of T Dwarfs
• From the first stars to the first black holes
• Discovery of eight z ~ 6 quasars from Pan-STARRS1
• Subaru High-z Exploration of Low-Luminosity Quasars (SHELLQs). II. Discovery of 32 Quasars and Luminous Galaxies at 5.7 < z < 6.8
• CRASH: a Radiative Transfer Scheme
• Super-Eddington growth of the first black holes
• Two Conditions for Galaxy Quenching: Compact Centres and Massive Haloes
• Evidence for a Cosmological Stromgren Surface and for Significant Neutral Hydrogen Surrounding the Quasar SDSS J1030+0524
• HST imaging and Keck Spectroscopy of z~6 I-band Drop-Out Galaxies in the ACS GOODS Fields
• Blowing cold flows away: the impact of early AGN activity on the formation of a brightest cluster galaxy progenitor
• The Connection Between Reddening, Gas Covering Fraction, and the Escape of Ionizing Radiation at High Redshift
• Subaru High-z Exploration of Low-Luminosity Quasars (SHELLQs). VI. Black Hole Mass Measurements of Six Quasars at 6.1<z<6.7
• Measuring the mass of the central black hole in the bulgeless galaxy NGC 4395 from gas dynamical modeling
• Quasar Elemental Abundances at High Redshifts
• Measurements of the z ~ 6 Intergalactic Medium Optical Depth and Transmission Spikes Using a New z > 6.3 Quasar Sample
• Unveiling the first black holes with JWST: multi-wavelength spectral predictions
• Probing the thermal state of the intergalactic medium at $z>5$ with the transmission spikes in high-resolution Ly$\alpha$ forest spectra
• Probing the Evolution of IR Properties of z~6 Quasars: Spitzer Observations
• Origin of the anti-hierarchical growth of black holes
• The environment of bright QSOs at z ~ 6: Star forming galaxies and X-ray emission
• Exploring Reionization-Era Quasars IV: Discovery of Six New $z\gtrsim 6.5$ Quasars with DES, VHS and unWISE Photometry
• Wandering Black Holes in Bright Disk Galaxy Halos
• The C IV Mass Density of the Universe at Redshift 5
• The space density of luminous dusty star-forming galaxies at $z>4$: SCUBA-2 and LABOCA imaging of ultrared galaxies from $Herschel$-ATLAS
• Experimental Constraints on Self-consistent Reionization Models
• A population of intermediate-mass black holes in dwarf starburst galaxies up to redshift=1.5
• Was reionization complete by z ~ 5-6?
• Constraining the radio-loud fraction of quasars at z>5.5
• Constraints on X-ray Emissions from the Reionization Era
• The 21 centimeter emission from the reionization epoch: extended and point source foregrounds
• A Candidate of a Least-Massive Black Hole at the First 1.1 Billion Years of the Universe
• Quasar Proximity Zones and Patchy Reionization
• High-redshift formation and evolution of central massive objects II: The census of BH seeds
• eLISA: Astrophysics and cosmology in the millihertz regime
• The Formation of the First Stars in the Universe
• Understanding the escape of LyC and Ly$\alpha$ photons from turbulent clouds
• A 1.2mm MAMBO/IRAM-30m Study of Dust Emission from optically luminous z~2 Quasars
• The Global History of Reionisation
• The influence of non-uniform reionization on the CMB
• SDSS quasars in the WISE preliminary data release and quasar candidate selection with optical/infrared colors
• Lyman-break galaxies at z~5 -I. First significant stellar mass assembly in galaxies that are not simply z~3 LBGs at higher redshift
• Luminous Lyman Break Galaxies at z>5 and the Source of Reionization
• Far-infrared and Molecular CO Emission From the Host Galaxies of Faint Quasars at z~6
• Iron Emission in z~6 QSOs
• VLT observations of the z=6.28 quasar SDSS 1030+0524
• The X-shooter/ALMA Sample of Quasars in the Epoch of Reionization. II. Black Hole Masses, Eddington Ratios, and the Formation of the First Quasars
• The Dark Age of the Universe
• Feedback in the local LBG Analog Haro 11 as probed by far-UV and X-ray observations
• The Subaru high-z quasar survey: discovery of faint z~6 quasars
• The REQUIEM Survey I: A Search for Extended Ly-Alpha Nebular Emission Around 31 z>5.7 Quasars
• Approaching Reionization: The Evolution of the Lyman Alpha Forest from Redshifts Four to Six
• The X-SHOOTER/ALMA sample of Quasars in the Epoch of Reionization. I. NIR spectral modeling, iron enrichment and broad emission line properties
• Quasars as probes of the submillimetre cosmos at z>5: I. Preliminary SCUBA photometry
• A Subaru Search for Lyman$\alpha$ Emitters at Redshift 5.7
• Cosmic Reionization and the 21-cm signal: Comparison between an analytical model and a simulation
• The first (nearly) model-independent constraint on the neutral hydrogen fraction at z~5--6
• The Environments of High Redshift QSOs
• Infrared background signatures of the first black holes
• Coevolution of Supermassive Black Holes and Circumnuclear Disks
• LCDM predictions for galaxy protoclusters I: the relation between galaxies, protoclusters and quasars at z~6
• Gravothermal Collapse of Self-Interacting Dark Matter Halos and the Origin of Massive Black Holes
• Modeling the cosmological co-evolution of supermassive black holes and galaxies: II. The clustering of quasars and their dark environment
• The formation of compact massive self-gravitating discs in metal-free haloes with virial temperatures of ~ 13000-30000 K
• EIGER V. Characterizing the Host Galaxies of Luminous Quasars at $z\gtrsim 6$
• Metals in the IGM approaching the re-ionization epoch: results from X-shooter at the VLT
• A survey of luminous high-redshift quasars with SDSS and WISE. I. target selection and optical spectroscopy
• Cosmological Hydrogen Reionization with Three Dimensional Radiative Transfer
• Tracing the Reionization-Epoch Intergalactic Medium with Metal Absorption Lines
• The X-ray properties of $z>6$ quasars: no evident evolution of accretion physics in the first Gyr of the Universe
• Constraints on the IMF of the first stars
• The Faint End of the z=5 Quasar Luminosity Function from the CFHTLS
• A star-forming galaxy at z=5.78 in the Chandra Deep Field South
• From Primordial Black Holes Abundance to Primordial Curvature Power Spectrum (and back)
• Glimpsing through the high redshift neutral hydrogen fog
• Direct formation of supermassive black holes in metal-enriched gas at the heart of high-redshift galaxy mergers
• Star Formation at z~6: i-dropouts in the ACS GTO fields
• Dynamics of galaxy cores and supermassive black holes
• On the observability of individual Population III stars and their stellar-mass black hole accretion disks through cluster caustic transits
• Evidence for Primordial Clustering Around the QSO SDSS J1030+0524 at z=6.28
• Cosmic Reionization Redux
• First discoveries of z~6 quasars with the Kilo Degree Survey and VISTA Kilo-Degree Infrared Galaxy survey
• Cosmological Origin of the Stellar Velocity Dispersions in Massive Early-Type Galaxies
• The History and Morphology of Helium Reionization
• The route to massive black hole formation via merger-driven direct collapse: a review
• Dust and star formation in distant radio galaxies
• The first blazar observed at z>6
• A comprehensive set of elemental abundances in damped Ly-alpha systems: revealing the nature of these high-redshift galaxies
• High-redshift quasars host galaxies: is there a stellar mass crisis?
• Black Holes in the Early Universe
• Millimeter and Radio Observations of z~6 Quasars
• Broad K$\alpha$ iron line from accretion disks around traversable wormholes
• Very High Redshift X-ray Selected AGN in the Chandra Deep Field-North
• Discovery of a z=6.1 Radio-Loud Quasar in the NDWFS
• Two bright z > 6 quasars from VST ATLAS and a new method of optical plus mid-infra-red colour selection
• Constraining the reionization history with QSO absorption spectra
• The Physical Properties and Detectability of Reionization-Epoch Galaxies
• The UDF05 Follow-up of the HUDF: II. Constraints on Reionization from z-dropout Galaxies
• First Discoveries of z>6 Quasars with the DECam Legacy Survey and UKIRT Hemisphere Survey
• Selection effects in the black hole-bulge relation and its evolution
• Predicting QSO Continua in the Ly Alpha Forest
• Accounting for selection effects in the BH-bulge relations: No evidence for cosmological evolution
• Imaging of SDSS z>6 quasar fields: gravitational lensing, companion galaxies and the host dark matter halos
• The Population of High Redshift AGNs in the Chandra COSMOS survey
• Intergalactic CIV absorption at redshifts 5.4 to 6
• Is there an upper limit to black hole masses?
• Probing Massive Black Hole Binary Populations with LISA
• Fast cold gas in hot AGN outflows
• Evolution of the Ionizing Radiation Background and Star Formation in the Aftermath of Cosmological Reionization
• Subaru High-z Exploration of Low-Luminosity Quasars (SHELLQs). XIII. Large-scale Feedback and Star Formation in a Low-Luminosity Quasar at z = 7.07 on the Local Black Hole to Host Mass Relation
• Updating reionization scenarios after recent data
• The Major Sources of the Cosmic Reionizing Background at z ~ 6
• The discovery of a highly accreting, radio-loud quasar at z=6.82
• An Overdensity of Galaxies near the Most Distant Radio-Loud Quasar
• Improved Constraints on The Neutral Intergalactic Hydrogen Surrounding Quasars at Redshifts z>6
• Evolving Spectra of Pop III Stars: Consequences for Cosmological Reionization
• Supermassive black holes from primordial black hole seeds
• Formation of galactic nuclei with multiple supermassive black holes at high redshifts
• On the formation of the first quasars
• A survey of luminous high-redshift quasars with SDSS and WISE II. the bright end of the quasar luminosity function at z ~ 5
• Intermediate mass black holes from stellar mergers in young star clusters
• Evolution in the Color-Magnitude Relation of Early-Type Galaxies in Clusters of Galaxies at z~=1
• Euclid preparation: V. Predicted yield of redshift 7<z<9 quasars from the wide survey
• Escape of ionizing radiation from high redshift dwarf galaxies: role of AGN feedback
• The primordial environment of super massive black holes: large scale galaxy overdensities around $z\sim 6$ QSOs with LBT
• The accretion history of the Universe with the SKA
• XQR-30: the ultimate XSHOOTER quasar sample at the reionization epoch
• Two-phase galaxy evolution: the cosmic star-formation histories of spheroids and discs
• Observational Signatures of High-Redshift Quasars and Local Relics of Black Hole Seeds
• Chandra Survey of Radio-quiet, High-redshift Quasars
• Distinguishing black holes and wormholes with orbiting hot spots
• MUSE Analysis of Gas around Galaxies (MAGG) -- III: The gas and galaxy environment of z = 3-4.5 quasars
• The brief era of direct collapse black hole formation
• The Epoch of Reionization in Models with Reduced Small Scale Power
• The redshift distribution of gamma-ray bursts revisited
• Shedding Light on the Galaxy Luminosity Function
• Discovery of excess O I absorption towards the z = 6.42 QSO SDSS J1148+5251
• The Parkes quarter-Jansky flat-spectrum sample 3. Space density and evolution of QSOs
• DES J0454-4448: Discovery of the First Luminous z > 6 Quasar from the Dark Energy Survey
• Sensitive observations at 1.4 and 250 GHz of z > 5 QSOs
• Physical Properties of Spectroscopically-Confirmed Galaxies at z >= 6. I. Basic Characteristics of the Rest-Frame UV Continuum and Lyman-alpha emission
• The systematic search for $z\gtrsim 5$ active galactic nuclei in the $Chandra$ Deep Field South
• Constraints on the correlation between QSO luminosity and host halo mass from high-redshift quasar clustering
• Discovery of a redshift 6.13 quasar in the UKIRT Infrared Deep Sky Survey
• Spatially Resolved Interstellar Medium and Highly-Excited Dense Molecular Gas in the Most Luminous Quasar at z=6.327
• Rest-frame Optical Spectra and Black Hole Masses of 3<z<6 Quasars
• Tests and problems of the standard model in Cosmology
• The Near Infrared Background: Interplanetary Dust or Primordial Stars?
• Faint AGN and the Ionizing Background
• Chemical evolution in a model for the joint formation of quasars and spheroids
• Gravitational lenses magnify up to one third of the most distant quasars
• Candidate z~8-9 Galaxies from WFC3 Imaging
• Black-hole-regulated star formation in massive galaxies
• Structure Formation Inside Triaxial Dark Matter Halos: Galactic Disks, Bulges and Bars
• Dynamical population synthesis: Constructing the stellar single and binary contents of galactic field populations
• Spectroscopy of z~6 i-dropout Galaxies: Frequency of Ly-alpha Emission and the Sizes of Ly-alpha Emitting Galaxies
• Revealing the Accretion Physics of Supermassive Black Holes at Redshift z~7 with Chandra and Infrared Observations
• Is there a Supermassive Black Hole at the Center of the Milky Way?
• Seeds Don't Sink: Even Massive Black Hole "Seeds" Cannot Migrate to Galaxy Centers Efficiently
• Co-evolution of massive black holes and their host galaxies at high redshift: discrepancies from six cosmological simulations and the key role of JWST
• The First Generation of Star-Forming Haloes
• Massive and Red Objects predicted by a semianalytical model of galaxy formation
• GA-NIFS: Black hole and host galaxy properties of two z$\simeq$6.8 quasars from the NIRSpec IFU
• Can massive primordial black holes be produced in mild waterfall hybrid inflation?
• Exploratory Chandra Observations of the Three Highest Redshift Quasars Known
• Constraints on the UV metagalactic emissivity using the LyA forest
• How Dark Matter Reionized The Universe
• Probing the Dark Ages with Metal Absorption Lines
• Making a supermassive star by stellar bombardment
• Faint High Latitude Carbon Stars Discovered by the Sloan Digital Sky Survey: Methods and Initial Results
• Gravitational Lensing of the SDSS High-Redshift Quasars
• The 21cm bispectrum as a probe of non-Gaussianities due to X-ray heating
• Unveiling a population of galaxies harboring low-mass black holes with X-rays
• Ultradeep Near-Infrared Observations of GOODS 850-5
• The suppression of direct collapse black hole formation by soft X-ray irradiation
• The high-redshift star formation rate derived from GRBs: possible origin and cosmic reionization
• Active and passive galaxies at z~2: Rest-frame optical morphologies with WFC3
• Heavy Element Absorption Systems at $5.0<z<6.8$: Metal-Poor Neutral Gas and a Diminishing Signature of Highly Ionized Circumgalactic Matter
• Three Lyman-alpha emitting galaxies within a quasar proximity zone at z=5.8
• The Equation of State of the Intergalactic Medium After Hydrogen Reionization
• The Discovery of Three New z>5 Quasars in the AGN and Galaxy Evolution Survey
• New Star Forming Galaxies at z\approx 7 from WFC3 Imaging
• The dust content of QSO hosts at high redshift
• Quasar Parallax: a Method for Determining Direct Geometrical Distances to Quasars
• High Redshift Intergalactic C IV Abundance Measurements from the Near-Infrared Spectra of Two z~6 QSOs
• Coupled spheroid and black-hole formation, and the multifrequency detectability of active galactic nuclei and submillimetre sources
• Studying the Lyman-$\alpha$ optical depth fluctuations at $z\sim 5.5$ using fast semi-numerical methods
• Discovery of Eight z ~ 6 Quasars in the Sloan Digital Sky Survey Overlap Regions
• The host galaxies and black-hole:galaxy mass ratios of luminous quasars at z~4
• Probabilistic selection of high-redshift quasars
• Proto-Quasars:Physical States and Observable Properties
• FeII/MgII Emission Line Ratios of QSOs. II. z>6 Objects
• Spectral Signature of Cosmological Infall of Gas Around the First Quasars
• Intergalactic Lyman continuum photon budget in the past 5 billion years
• Relic Black Holes In Galactic Nuclei
• Detecting and Characterizing Young Quasars II: Four Quasars at $z\sim 6$ with Lifetimes $<10^4$ years
• Signatures of primordial black holes as seeds of supermassive black holes
• First results from the Canada-France High-z Quasar Survey: Constraints on the z=6 quasar luminosity function and the quasar contribution to reionization
• The First High Redshift Quasar from Pan-STARRS
• Lower Metal Enrichment of Virialized Gas in Minihalos
• The evolution of SMBH spin and AGN luminosities for $z<6$ within a semi-analytic model of galaxy formation
• Quasar candidate selection and photometric redshift estimation based on SDSS and UKIDSS data
• A deep, narrow J-band search for proto-galactic Lyman Alpha emission at redshifts z~9
• Complete infrared spectral energy distributions of mm detected quasars at z>5
• Evidence for strong evolution of the cosmic star formation density at high redshift
• Prospects for Redshifted 21-cm observations of quasar HII regions
• Feedback from supercritical disk accretion flows; Two-dimensional radiation-hydrodynamic simulations of stable and unstable disks with radiatively driven outflows
• A Snapshot Survey for Gravitational Lenses Among z>=4.0 Quasars: I. The z>5.7 Sample
• Measuring Quasar Variability with Pan-STARRS1 and SDSS
• Large Scale Environment of a $z=6.61$ Luminous Quasar Probed by Ly$\alpha$ Emitters and Lyman Break Galaxies
• The Lyman Continuum Escape Survey: Connecting Time-Dependent [OIII] and [OII] Line Emission with Lyman Continuum Escape Fraction in Simulations of Galaxy Formation
• A Cross-Match of 2MASS and SDSS. II. Peculiar L Dwarfs, Unresolved Binaries, and the Space Density of T Dwarf Secondaries
• Estimate black hole masses of AGNs using ultraviolet emission line properties
• Chronicling the reionization history at $6\lesssim z\lesssim 7$ with emergent quasar damping wings
• The escape of ionizing photons from supernova-dominated primordial galaxies
• Modeling the Counts of Faint Radio Loud Quasars: Constraints on the Supermassive Black Hole Population and Predictions for High Redshift
• Probing the faint end of the quasar luminosity function at z ~ 4 in the COSMOS field
• Large-Scale Structure Formation: from the first non-linear objects to massive galaxy clusters
• A New Method to Measure the Post-Reionization Ionizing Background from the Joint Distribution of Lyman-$\alpha$ and Lyman-$\beta$ Forest Transmission
• No Redshift Evolution in the Broad Line Region Metallicity up to z=7.54: Deep NIR Spectroscopy of ULAS J1342+0928
• Into the central 10 pc of the most distant known radio quasar. VLBI imaging observations of J1429+5447 at z=6.21
• Observations of the Lyman series forest towards the redshift 7.1 quasar ULAS J1120+0641
• The escape of ionising radiation from high-redshift dwarf galaxies
• A comparison of quasar emission reconstruction techniques for $z\ge 5.0$ Lyman-$\alpha$ and Lyman-$\beta$ transmission
• A Constraint on the Gravitational Lensing Magnification and Age of the Redshift z=6.28 Quasar SDSS 1030+0524
• High redshift quasars and the supermassive black hole mass budget: constraints on quasar formation models
• On the faint end of the high redshift AGN luminosity function
• Evolving parsec-scale radio structure in the most distant blazar known
• Observable Properties of Cosmological Reionization Sources
• MUSE Analysis of Gas around Galaxies (MAGG) -- IV: The gaseous environment of $z\sim$ 3-4 Lyman-alpha emitting galaxies
• Is there a maximum mass for black holes in galactic nuclei?
• Constraining the second half of reionization with the Lyman-$\beta$ forest
• Thermal evolution of the primordial clouds in warm dark matter models with keV sterile neutrinos
• Redshifted 21cm Signatures Around the Highest Redshift Quasars
• UNCOVER: 404 Error -- Models Not Found for the Triply Imaged Little Red Dot A2744-QSO1
• Simulating the growth of Intermediate Mass Black Holes
• New Constraints on the Escape of Ionizing Photons From Starburst Galaxies Using Ionization-Parameter Mapping
• High redshift supermassive blackholes: accretion through cold flows
• The Strömgren sphere, the environment and the reionization in the local universe of the highest redshift QSOs
• Searching for Star Formation Beyond Reionization
• The impact of spin temperature fluctuations on the 21-cm moments
• An Ionization Cone in the Dwarf Starburst Galaxy NGC 5253
• The ionizing background at the end of overlap
• Photon Trapping Enables Super-Eddington Growth of Black-Hole Seeds in Galaxies at High Redshift
• Implications of Quasar Black Hole Masses at High Redshifts
• Realistic Event Rates for Detection of Supermassive Black Hole Coalescence by LISA
• The Faint End of the Quasar Luminosity Function at z~4
• Chasing the observational signatures of seed black holes at z > 7: candidate observability
• Chasing the observational signatures of seed black holes at z > 7: candidate statistics
• Indication for an intermediate-mass black hole in the globular cluster NGC 5286 from kinematics
• Rapid Black Hole Growth under Anisotropic Radiation Feedback
• Star Formation at the Twilight of the Dark Ages: Which Stars Reionized the Universe?
• Environments of z>5 quasars: searching for protoclusters at submillimetre wavelengths
• The Halo Occupation Distribution of Active Galactic Nuclei
• Jet enhanced accretion growth of supermassive black holes
• Two more, bright, z > 6 quasars from VST ATLAS and WISE
• Lyman continuum leaking AGN in the SSA22 field
• Discovery of a Radio-Selected z ~ 6 Quasar
• Intermediate-mass black holes from Population III remnants in the first galactic nuclei
• Exploring 21cm - Lyman Alpha emitter synergies for SKA
• The Ionizing Photon Production Efficiency (${\xi }_{ion}$) Of Lensed Dwarf Galaxies At $z\sim 2$
• Formation of supermassive black hole seeds in nuclear star clusters via gas accretion and runaway collisions
• Unveiling early black hole growth with multi-frequency gravitational wave observations
• Constraining the Redshift z=6 Quasar Luminosity Function Using Gravitational Lensing
• The Search for the Farthest Quasar: Consequences for Black Hole Growth and Seed Models
• Antiproton and Positron Signal Enhancement in Dark Matter Mini-Spikes Scenarios
• The estimate of kinetic powers of jets in FRII radio galaxies: existence of invisible components?
• Faint progenitors of luminous $z\sim 6$ quasars: why don't we see them?
• The Impact of Energy Feedback on Quasar Evolution and Black Hole Demographics
• First constraints on the AGN X-ray luminosity function at $z\sim 6$ from an eROSITA-detected quasar
• Accretion, Growth of Supermassive Black Holes, and Feedback in Galaxy Mergers
• Discovery of 24 radio-bright quasars at $4.9\le z\le 6.6$ using low-frequency radio observations
• Faint-end Quasar Luminosity Functions from Cosmological Hydrodynamic Simulations
• Constraining the Quasar Contribution to the Reionisation of Cosmic Hydrogen
• Dwarf AGNs from Optical Variability for the Origins of Seeds (DAVOS): Insights from the Dark Energy Survey Deep Fields
• Are There Enough Ionizing Photons to Reionize the Universe by z=6?
• Constraining the coalescence rate of supermassive black-hole binaries using pulsar timing
• Modelling the luminosities and sizes of radio galaxies: radio luminosity function at z = 6
• Galactic Wind Signatures around High Redshift Galaxies
• Constraints to the evolution of Ly-Alpha bright galaxies between z=3 and z=6
• The Pan-STARRS1 $\mathbf{z}>5.6$ Quasar Survey: III. The $\mathbf{z}\approx 6$ Quasar Luminosity Function
• The Space Density of Redshift 5.7 Ly-Alpha Emitters
• Probing the Radio Loud/Quiet AGN dichotomy with quasar clustering
• A new bright z=6.82 quasar discovered with VISTA: VHS J0411-0907
• The role of stellar relaxation in the formation and evolution of the first massive black holes
• The 21 Centimeter Forest
• Prospects of observing a quasar HII region during the Epoch of Reionization with redshifted 21cm
• Supermassive black hole ancestors
• Discovery of a new high redshift QSO at z=5.96 with the Subaru telescope
• The mass assembly of high-redshift black holes
• Angular correlations in the cosmic gamma-ray background from dark matter annihilation around intermediate-mass black holes
• Dark Matter Annihilation around Intermediate Mass Black Holes: an update
• Fundamental differences in the radio properties of red and blue quasars: Insight from the LOFAR Two-metre Sky Survey (LoTSS)
• Evidence for Short $\sim 1$ Myr Lifetimes from the He II Proximity Zones of $z\sim 4$ Quasars
• A study of AGN and supernova feedback in simulations of isolated and merging disc galaxies
• Primordial black holes with mass $10^{16}-10^{17}$ g and reionization of the Universe
• The 500 ks Chandra observation of the z = 6.31 QSO SDSS J1030+0524
• Infrared signature of active massive black holes in nearby dwarf galaxies
• Discovery of an Optically-Faint Quasar at z=5.70 and Implications for the Faint End of the Quasar Luminosity Function
• Two channels of supermassive black hole growth as seen on the galaxies mass-size plane
• Discovery of a galaxy overdensity around a powerful, heavily obscured FRII radio galaxy at z=1.7: star formation promoted by large-scale AGN feedback?
• Physical Properties of Spectroscopically-Confirmed Galaxies at $z\ge 6$. III. Stellar Populations from SED Modeling with Secure Ly$\alpha$ Emission and Redshifts
• High-resolution radio imaging of the most distant radio quasar SDSS J0836+0054
• Ly$\alpha$ Halos Around $z\sim 6$ Quasars
• Fast Growth of Supermassive Black Holes in Galaxies
• Stunted accretion growth of black holes by combined effect of the flow angular momentum and radiation feedback
• Probing the Epoch of Reionization with the Lyman Alpha Forest at z~4-5
• Unresolved X-ray background: clues on galactic nuclear activity at z>6
• Sunyaev-Zeldovich Effect from Quasar-driven Blast-waves
• HST narrow-band search for extended Ly-alpha emission around two z>6 quasars
• The effect of baryonic streaming motions on the formation of the first supermassive black holes
• Radio structure of the most distant radio-detected quasar at the ten milli- arcsecond scale
• Early formation of galaxies initiated by clusters of primordial black holes
• A cryogenic liquid-mirror telescope on the moon to study the early universe
• Finding Quasars behind the Galactic Plane. I. Candidate Selections with Transfer Learning
• The Near and Mid-infrared photometric properties of known redshift $z\ge 5$ Quasars
• Exploring the AGN Fraction of a Sample of JWST's Little Red Dots at $5<z<8$: Overmassive Black Holes Are Strongly Favored
• Constraining galaxy overdensities around three z~6.5 quasars with ALMA and MUSE
• Probing the dark ages with redshift distribution of GRBs
• A spectral stacking analysis to search for faint outflow signatures in z~6 quasars
• A QSO host galaxy and its Lyalpha emission at z=6.43
• Limits to Rest-Frame Ultraviolet Emission From Far-Infrared-Luminous z~6 Quasar Hosts
• No Evidence for Millimeter Continuum Source Overdensities in the Environments of $z\gtrsim 6$ Quasars
• Spitzer Observations of High Redshift QSOs
• Dark matter annihilation from intermediate-mass black holes: Contribution to the extragalactic gamma-ray background
• Forming supermassive black holes by accreting dark and baryon matter
• Gaseous dynamical friction under radiative feedback: do intermediate-mass black holes speed up or down?
• The Infrared Medium-deep Survey. VIII. Quasar Luminosity Function at $z\sim 5$
• Bulge-driven Fueling of Seed Black Holes
• Close companions to two high-redshift quasars
• How Neutral is the Intergalactic Medium at z ~ 6?
• The Damping Wing of the Gunn-Peterson Absorption and Lyman-Alpha Emitters in the Pre-Reionization Era
• Formation of High-redshift (z>6) Quasars Driven by Nuclear Starbursts
• Absorbers and Globular Cluster Formation in Powerful High Redshift Radio Galaxies
• Spherical Isothermal Self-Similar Shock Flows
• Calibrating the Galaxy Halo - Black Hole Relation Based on the Clustering of Quasars
• Probing the $z\gtrsim 6$ quasars in a universe with IllustrisTNG physics: Impact of gas-based black hole seeding models
• Formation, disruption and energy output of Population III X-ray binaries
• The Stellar Initial Mass Function at the Epoch of Reionization
• A Chandra Search for X-Ray Jets in Redshift 6 Quasars
• Early Black Holes in Cosmological Simulations: Luminosity Functions and Clustering Behaviour
• Dwarf AGNs from Variability for the Origins of Seeds (DAVOS): Intermediate-mass black hole demographics from optical synoptic surveys
• The effects of primordial non-Gaussianity on the cosmological reionization
• Feedback Limits Rapid Growth of Seed Black Holes at High Redshift
• On inferring extinction laws in z~6 quasars as signatures of supernova dust
• The X-ray Spectrum of the z=6.30 QSO SDSS J1030+0524
• New Method for Exploring Super-Eddington AGNs by Near-infrared Observations
• Role of the H${}_2^{+}$ channel in the primordial star formation under strong radiation field and the critical intensity for the supermassive star formation
• The host galaxies of z=7 quasars: predictions from the BlueTides simulation
• The hyperluminous Compton-thick $z\sim 2$ quasar nucleus of the hot DOG W1835+4355 observed by NuSTAR
• Cosmological Implications of the Very High Redshift GRB 050904
• Super-Eddington mass growth of intermediate-mass black holes embedded in dusty circumnuclear disks
• A Fast, Accurate and Robust Algorithm For Transferring Radiation in Three-Dimensional Space
• Subaru High-z Exploration of Low-Luminosity Quasars (SHELLQs) XII. Extended [C II] Structure (Merger or Outflow) in a z = 6.72 Red Quasar
• The Chandra Deep Field-North Survey. XVI. The X-ray properties of moderate-luminosity Active Galaxies at z>4
• How to Search for Islands of Neutral Hydrogen in the $z\sim 5.5$ IGM
• Probing the thermal history during reionization using a semi-numerical photon-conserving code SCRIPT
• Demographics of z ~ 6 Quasars in the Black Hole Mass-Luminosity Plane
• The Effect of Large-Scale Structure on the Magnification of High-Redshift Sources by Cluster-Lenses
• Dust emission and star formation toward a redshift 5.5 QSO
• Finding New High-Redshift Quasars by Asking the Neighbours
• Radiation from early black holes - I: effects on the neutral inter-galactic medium
• Effect of non-equilibrium ionization on derived physical conditions of the high-$z$ intergalactic medium
• Metal enrichment and evolution in four z > 6.5 quasar sightlines observed with JWST/NIRSpec
• The Sloan Digital Sky Survey
• The Accretion Geometry in Radio-Loud Active Galaxies
• Black Holes as Dark Matter Annihilation Boosters
• On the origin of low escape fractions of ionizing radiation from massive star-forming galaxies at high redshift
• Mergers of accreting stellar-mass black holes
• AzTEC 1.1 mm images of 16 radio galaxies at 0.5<z<5.2 and a quasar at z=6.3
• Gravitational lensing magnification without multiple imaging
• Driving the Growth of the Earliest Supermassive Black Holes with Major Mergers of Host Galaxies
• Discovery of a z=4.93, X-ray selected quasar by the Chandra Multiwavelength Project (ChamP)
• Feedback Limits to Maximum Seed Masses of Black Holes
• VLT/XSHOOTER & Subaru/MOIRCS Spectroscopy of HUDF-YD3: No Evidence for Lyman-alpha Emission at z=8.55
• A Multiwavelength Study of Binary Quasars and Their Environments
• Hyper-Eddington Black Hole Growth in Star-Forming Molecular Clouds and Galactic Nuclei: Can It Happen?
• The radio spectral turnover of radio-loud quasars at $z>5$
• Reionization on Large Scales II: Detecting Patchy Reionization through Cross Correlation of the Cosmic Microwave Background
• Impact of gas spin and Lyman-Werner flux on black hole seed formation in cosmological simulations: implications for direct collapse
• Eight new quasars discovered by LAMOST in one extragalactic field
• The Evolution of Active Galactic Nuclei in Warm Dark Matter Cosmology
• Effect of mass loss due to stellar winds on the formation of supermassive black hole seeds in dense nuclear star clusters
• The Cosmic History of Black Hole Growth from Deep Multiwavelength Surveys
• Evidence for Merger-Driven Activity in the Clustering of High Redshift Quasars
• Gas distribution, metal enrichment, and baryon fraction in Gaussian and non-Gaussian universes
• The Assembly of Black Hole Mass and Luminosity Functions of High-redshift Quasars via Multiple Accretion Episodes
• The seeds of supermassive black holes and the role of local radiation and metal spreading
• Quasars as probes of cosmological reionization
• Observing the host galaxies of high-redshift quasars with JWST: predictions from the BlueTides simulation
• Transition From Population III to Population II Stars
• Observing the First Stars and Black Holes
• The comoving mass density of MgII from $z\sim 2$ to $5.5$
• GA-NIFS and EIGER: A merging quasar host at z=7 with an overmassive black hole
• Decline of the space density of quasars between z=2 and z=4
• Observational properties of a general relativistic instability supernova from a primordial supermassive star
• The Ionised- and Cool-Gas Content of The BR1202-0725 System as seen by MUSE and ALMA
• The deep Chandra survey in the SDSS J1030+0524 field
• WISE detections of known QSOs at redshifts greater than six
• The Formation and Evolution of the First Massive Black Holes
• On the Prevalence of Super-Massive Black Holes over Cosmic Time
• Dynamical evolution of massive black holes in galactic-scale N-body simulations - introducing the regularized tree code "rVINE"
• AGN Outflows and the Matter Power Spectrum
• The Infrared Medium-deep Survey. VI. Discovery of Faint Quasars at $z\sim 5$ with a Medium-band-based Approach
• Can We Detect the Anisotropic Shapes of Quasar HII Regions During Reionization Through The Small-Scale Redshifted 21cm Power Spectrum?
• Constraining the Gravitational Lensing of $z\gtrsim 6$ Quasars from their Proximity Zones
• SED constraints on the highest-$z$ blazar jet: QSO J0906+6930
• Chandra Detection of Highest Redshift (z~6) Quasars in X-rays
• A Thirty-Four Billion Solar Mass Black Hole in SMSS J2157-3602, the Most Luminous Known Quasar
• A simple model for the evolution of super-massive black holes and the quasar population
• The Dark Ages of the Universe and Hydrogen Reionization
• The imprint of the cosmic supermassive black hole growth history on the 21 cm background radiation
• Subaru High-z Exploration of Low-Luminosity Quasars (SHELLQs). IX. Identification of Two Red Quasars at z > 5.6
• Lyman$\alpha$ Emitters beyond Redshift 5:The Dawn of Galaxy Formation
• Cosmological simulations of quasar fueling to sub-parsec scales using Lagrangian hyper-refinement
• Late-time vacuum phase transitions: Connecting sub-eV scale physics with cosmological structure formation
• Constraining the Black Hole Mass Spectrum with Gravitational Wave Observations I: The Error Kernel
• Gemini-South + FLAMINGOS Demonstration Science: Near-Infrared Spectroscopy of the z=5.77 Quasar SDSS J083643.85+005453.3
• Search for traversable wormholes in active galactic nuclei using X-ray data
• AGN Outflows in a Cosmological Context
• The hidden satellites of massive galaxies and quasars at high-redshift
• The First Compact Objects in the $\Lambda$-dominated Universe
• A very bright i=16.44 quasar in the `redshift desert' discovered by LAMOST
• Photometric Properties of the Most Massive High-Redshift Galaxies
• Probing the High-Redshift Universe with SPICA: Toward the Epoch of Reionization and Beyond
• X-ray emission from a rapidly accreting narrow-line Seyfert 1 galaxy at z=6.56
• Modification of the 21-cm power spectrum by X-rays during the epoch of reionisation
• A practical guide to the massive black hole cosmic history
• Quasars as Probes of Late Reionization and Early Structure Formation
• Microquasars as heating sources of the intergalactic medium during reionisation of the Universe
• Black Hole Growth in Disk Galaxies Mediated by the Secular Evolution of Short Bars
• Radio Jet Proper-motion Analysis of Nine Distant Quasars above Redshift 3.5
• SDSSp J104433.04$-$012502.2 at $z=5.74$ is Gravitationally Magnified by an Intervening Galaxy
• Discovery of a single faint AGN in a large sample of z>5 Lyman break galaxies
• Little Red Dots Are Nurseries of Massive Black Holes
• The most massive Population III stars
• From Seeds to Supermassive Black Holes: Capture, Growth, Migration, and Pairing in Dense Proto-Bulge Environments
• Impact of gas based seeding on supermassive black hole populations at $z\ge 7$
• The Color Selection of Quasars from Redshifts 5 to 10: Cloning and Discovery
• Selection constraints on high redshift quasar searches in the VISTA kilo-degree infrared galaxy survey
• Properties of High Redshift Quasars-I: Evolution of the super-massive black-hole to halo mass ratio
• The ALHAMBRA survey: Discovery of a faint QSO at z = 5.41
• Star formation and accretion in the circumnuclear disks of active galaxies
• Mutual Constraints Between Reionization Models and Parameter Extraction From Cosmic Microwave Background Data
• Supermassive black hole formation via collisions in black hole clusters
• Modification of the 21-cm power spectrum by quasars during the epoch of reionisation
• Radiation-driven turbulent accretion onto massive black holes
• The molecular gas content of z > 6.5 Lyman-alpha emitters
• A deep 1.4 GHz survey of the J1030 equatorial field: a new window on radio source populations across cosmic time
• The SRG/eROSITA All-Sky Survey: X-ray beacons at late cosmic dawn
• Observations by GMRT at 323 MHz of radio-loud quasars at $z>5$
• SAGE: finding IMBH in the black hole desert
• Lyman Alpha Constraints on Very Low Luminosity AGN
• Conditions for direct black hole seed collapse near a radio-loud quasar 1 Gyr after the Big Bang
• New Supporting Evidence for the Overdensity of Galaxies around the Radio-Loud Quasar SDSS J0836+0054 at z =5.8
• The Multi-Band Magnification Bias for Gravitational Lenses
• Black hole mergers as tracers of spinning massive black hole and galaxy populations in the OBELISK simulation
• The Infrared Medium-deep Survey. III. Survey of Luminous Quasars at 4.7 $\le$ z $\le$ 5.4
• Gamma-Rays from Dark Matter Mini-Spikes in M31
• High Redshift X-Ray Selected Quasars: CXOCY J125304.0-090737 joins the club
• A Simple Prediction on the Surface Density of Galaxies at z ~ 6
• AGNs at the cosmic dawn: predictions for future surveys from a $\Lambda$CDM cosmological model
• The optically-selected 1.4-GHz quasar luminosity function below 1 mJy
• The growth of supermassive black holes fed by accretion disks
• Chemical Composition of the Early Universe
• Extreme Galaxies During Reionization: Testing ISM and Disk Models
• Recoiling Supermassive Black Hole Escape Velocities from Dark Matter Halos
• Black hole mass and spin estimates of the most distant quasars
• Radiative feedback for supermassive star formation in a massive cloud with H2 molecules in an atomic-cooling halo
• Probing black hole accretion in quasar pairs at high redshift
• Wide Field Surveys and Astronomical Discovery Space
• Properties of High Redshift Quasars-II: What does the quasar luminosity function tell us about super-massive black-hole evolution?
• Quasar UV Luminosity Function at $3.5<z<5.0$ from SDSS Deep Imaging Data
• Paving the Way for Euclid and JWST via Optimal Selection of High-z Quasars
• The shallow slope of the z~6 quasar luminosity function: limits from the lack of multiple image gravitational lenses
• JADES reveals a large population of low mass black holes at high redshift
• Supermassive black hole seeds from sub-keV dark matter
• Dark Matter: the Connection with Gamma-Ray Astrophysics
• Chandra measurement of the X-ray spectrum of a quasar at z=5.99
• Three-Dimensional Modelling of Ionized Gas. I. Did very massive stars of different metallicities drive the second cosmic reionization?
• Lyman Break Galaxies and Reionization of the Universe
• Dark Energy Survey Identification of A Low-Mass Active Galactic Nucleus at Redshift 0.823 from Optical Variability
• Constraining the luminosity function of faint undetected i-dropout galaxies
• An Exploratory Search for z~6 Quasars in the UKIDSS Early Data Release
• The inhomogenous reionization of the inter-galactic medium by metal-poor globular clusters
• Joint Survey Processing I: Compact oddballs in the COSMOS field -- low-luminosity Quasars at z > 6?
• Measuring the undetectable: Proper motions and parallaxes of very faint sources
• Formation of the First Black Holes: Current observational status
• An X-ray fading, UV brightening QSO at $z\approx 6$
• Evolution of the mass relation between supermassive black holes and dark matter halos across the cosmic time
• Successive Merger of Multiple Massive Black Holes in a Primordial Galaxy
• SMBH growth parameters in the early Universe of Millennium and Millennium-II simulations
• The Baryon Cycle at High Redshifts: Effects of Galactic Winds on Galaxy Evolution in Overdense and Average Regions
• X-rays from the First Massive Black Holes
• Constraining the host galaxy halos of massive black holes from LISA event rates
• Mission Design for the TAIJI misson and Structure Formation in Early Universe
• Multi-wavelength properties of three new radio-powerful $z\sim 5.6$ quasi-stellar objects discovered from RACS
• The host galaxies of radio-loud quasars at z>5 with ALMA
• Predictions for the Counts of Faint, High-Redshift Galaxies in the Mid-Infrared
• Reionization: Characteristic Scales, Topology and Observability
• Biconical-dominated Accretion Flow onto Seed Black Holes in a Hyper-accretion Regime
• AGN feedback in an infant galaxy cluster: the LOFAR-Chandra view of the giant FRII radio galaxy J103025+052430 at z=1.7
• Properties of AGN selected by their mid-IR colours: evidence for a physically distinct mode of black hole growth
• Inference of the optical depth to reionization $\tau$ from $\text{Planck}$ CMB maps with convolutional neural networks
• Optical and Infrared Non-detection of the z=10 Galaxy Behind Abell 1835
• Deep I-band Imaging of z=5.99 Quasar
• The chemical evolution of self-gravitating primordial disks
• Radio recombination lines from obscured quasars with the SKA
• High-$z$ radio Quasars in RACS I: Selection, identification, and multi-wavelength properties
• Cosmic reionization in a dynamic quintessence cosmology
• Revealing new high redshift quasar populations through Gaussian mixture model selection
• X-ray constraints on the spectral energy distribution of the $z=5.18$ blazar SDSS J013127.34-032100.1
• Redshift identification of X-ray selected active galactic nuclei in the J1030 field: searching for large-scale structures and high-redshift sources
• Cosmic reionization of hydrogen and helium: contribution from both mini-quasars and stars
• Are Two z~6 Quasars Gravitationally Lensed ?
• Modeling the accretion history of supermassive black holes
• Prospects of a statistical detection of the 21-cm forest and its potential to constrain the thermal state of the neutral IGM during reionization
• Identification of Intermediate-mass Black Hole Candidates Among a Sample of Sd Galaxies
• A survey for low luminosity quasars at redshift z~5
• First Light and Reionization: A Conference Summary
• Project Lyman
• Constraining Dynamical Dark Energy Models through the Abundance of High-Redshift Supermassive Black Holes
• Cosmological evolution of compact AGN at 15 GHz
• Accelerated growth of seed black holes by dust in the early universe
• The optical luminosity function of LOFAR radio-selected quasars at $1.4\le z\le 5.0$ in the NDWFS-Boötes field
• Merger Criteria of Multiple Massive Black Holes and the Impact on the Host Galaxy
• Coalescence Rate of Supermassive Black Hole Binaries Derived from Cosmological Simulations: Detection Rates for LISA and ET
• Inhomogenous Primordial Baryon Distributions on Sub-Galactic Scales: High-z Galaxy Formation with WDM
• Can Dark Stars account for the star formation efficiency excess at very high redshifts?
• The impact of large-scale galaxy clustering on the variance of the Hellings-Downs correlation: numerical results
• JWST's PEARLS: A z=6 quasar in a train-wreck galaxy merger system
• The BTC40 Survey for Quasars at 4.8 < z < 6
• A method for checking high-redshift identification of radio AGNs
• Optical-NIR spectra of quasars close to reionization (z~ 6)
• Formation and Growth of the First Supermassive Black Holes in MOG
• Discovery of six high-redshift quasars with the Lijiang 2.4m telescope and the Multiple Mirror Telescope
• LBT-MODS spectroscopy of high-redshift candidates in the Chandra J1030 field. A newly discovered z$\sim$2.8 large scale structure
• Discovering bright quasars at intermediate redshifts based on the optical/near-IR colors
• Hyper-massive Black Holes have Faint Broad and Narrow Emission Lines
• Discovery of two quasars at $z=5$ from the OGLE Survey
• Shedding the envelope: JWST reveals a kiloparsec-scale [OIII]-weak Balmer shell around a z=7.64 quasar
• Exploring the cosmic dark ages with the next generation of space and ground-based facilities
• Lyman-α polarization from cosmological ionization fronts: I. Radiative transfer simulations
• Joint Lyα emitters - quasars reionization constraints
• Causal Set Phenomenology
• High Redshift Candidates and the Nature of Small Galaxies in the Hubble Deep Field
• Ultra High Energy Cosmic Rays from Sequestered X Bursts
• Instruments on large optical telescopes -- A case study
• REBELS-IFU: Spatially Resolved Ionizing Photon Production Efficiencies of 12 Bright Galaxies in the Epoch of Reionization
• Merging Rates of the First Objects and the Formation of First Mini-Filaments in Models with Massive Neutrinos
• Finding the Most Distant Quasars Using Bayesian Selection Methods
• High redshift galaxy surveys
• Cosmological test using the high-redshift detection rate of FSRQs with the Square Kilometer Array
• The Challenge to Large Optical Telescopes from X-ray Astronomy
• Lensing in the Darkness: A Bayesian Analysis of 22 Chandra Sources at $z\gtrsim 6$ Shows No Evidence of Lensing
• The Most Distant Galaxies
• Radiative feedback on supermassive star formation: the massive end of the Population III initial mass function
• Finding Fast Transients in Real Time Using Novel Light Curve Analysis Algorithm
• Observational Comparison of Star Formation in Different Galaxy Types
• Luminosities, Masses and Star Formation Rates of Galaxies at High Redshift (IAU279 conference proceedings)
• 4MOST ChANGES: Catalog of high-redshift quasar candidates (4.5 < $z$ < 7) selected with SED fitting
• Dark Matter Energy Deposition and Production from the Table-Top to the Cosmos
• The Discovery of a Very Narrow-Line Star Forming Obat a Redshift of 5.66ject
• Rapid sinking and efficient mergers of supermassive black holes in compact high-redshift galaxies