Quasar Quartet Embedded in Giant Nebula Reveals Rare Massive Structure in Distant Universe

Abstract

All galaxies once passed through a hyperluminous quasar phase powered by accretion onto a supermassive black hole. But because these episodes are brief, quasars are rare objects typically separated by cosmological distances. In a survey for Lyman-alpha emission at redshift z ~ 2, we discovered a physical association of four quasars embedded in a giant nebula. Located within a substantial overdensity of galaxies, this system is probably the progenitor of a massive galaxy cluster. The chance probability of finding a quadruple quasar is estimated to be ~10^-7, implying a physical connection between Lyman-alpha nebulae and the locations of rare protoclusters. Our findings imply that the most massive structures in the distant universe have a tremendous supply (~ 10^11 solar masses) of cool dense (volume density ~1 cm^-3) gas, which is in conflict with current cosmological simulations.

accepted for publication in Science. Main text: 11 pages, 4 figures; Supplementary Online Material: 52 pages, 10 figures, 6 tables

References in corpus (100)

• The Seventh Data Release of the Sloan Digital Sky Survey
• Unified Schemes for Radio-Loud Active Galactic Nuclei
• The Demography of Massive Dark Objects in Galaxy Centres
• Halo Models of Large Scale Structure
• Composite Quasar Spectra From the Sloan Digital Sky Survey
• The Ninth Data Release of the Sloan Digital Sky Survey: First Spectroscopic Data from the SDSS-III Baryon Oscillation Spectroscopic Survey
• Rest-Frame Ultraviolet Spectra of z~3 Lyman Break Galaxies
• Spectral Energy Distributions and Multiwavelength Selection of Type 1 Quasars
• Radiative transfer in a clumpy universe: IV. New synthesis models of the cosmic UV/X-ray background
• An Observational Determination of the Bolometric Quasar Luminosity Function
• Mid-Infrared Selection of Active Galaxies
• Spectral Energy Distributions of Hard X-ray selected AGNs in the XMDS Survey
• Mid-Infrared Selection of AGN with the Wide-Field Infrared Survey Explorer. I. Characterizing WISE-Selected AGN in COSMOS
• The DEEP2 Galaxy Redshift Survey: Design, Observations, Data Reduction, and Redshifts
• Obscured and unobscured active galactic nuclei in the Spitzer Space Telescope First Look Survey
• Lyman Alpha Imaging of a Proto-Cluster Region at <z>=3.09
• Beyond the Bulge: a Fundamental Relation Between Supermassive Black Holes and Dark Matter Halos
• Hubble Space Telescope Images of a Sample of Twenty Nearby Luminous Quasars
• A Composite HST Spectrum of Quasars
• Deep Extragalactic X-ray Surveys
• Multi-Phase Galaxy Formation: High Velocity Clouds and the Missing Baryon Problem
• Mid-Infrared Selection of Active Galactic Nuclei with the Wide-Field Infrared Survey Explorer. II. Properties of WISE-Selected Active Galactic Nuclei in the NDWFS Boötes Field
• Distant Radio Galaxies and their Environments
• A cosmic web filament revealed in Lyman-alpha emission around a luminous high-redshift quasar
• Clustering of High Redshift ($z\ge 2.9$) Quasars from the Sloan Digital Sky Survey
• Candidate Type II Quasars from the Sloan Digital Sky Survey: I. Selection and Optical Properties of a Sample at 0.3<Z<0.83
• Broad Emission Line Shifts in Quasars: An Orientation Measure for Radio-Quiet Quasars?
• Ancient Light from Young Cosmic Cities: Physical and Observational Signatures of Galaxy Proto-Clusters
• Low Resolution Spectral Templates For AGNs and Galaxies From 0.03 -- 30 microns
• Space density of optically-selected type 2 quasars
• Binary Quasars in the Sloan Digital Sky Survey: Evidence for Excess Clustering on Small Scales
• The XMM-Newton Wide-Field Survey in the COSMOS field (XMM-COSMOS): demography and multiwavelength properties of obscured and unobscured luminous AGN
• The first ultraviolet quasar stacked spectrum at z=2.4 from WFC3
• Active Galactic Nuclei in the Sloan Digital Sky Survey: I. Sample Selection
• Dusty, Radiation Pressure Dominated Photoionization. II. Multi-Wavelength Emission Line Diagnostics for Narrow Line Regions
• Soft X-ray and Ultraviolet Emission Relations in Optically Selected AGN Samples
• The clustering of intermediate redshift quasars as measured by the Baryon Oscillation Spectroscopic Survey
• On the Origin of the Extended Halpha Filaments in Cooling Flow Clusters
• Protoclusters associated with z > 2 radio galaxies. I. Characteristics of high redshift protoclusters
• The Evolution of the Broad-Line Region among SDSS Quasars
• Characterizing the Mid-IR Extragalactic Sky with WISE and SDSS
• Neutral hydrogen in galaxy halos at the peak of the cosmic star formation history
• Quasars Probing Quasars I: Optically Thick Absorbers Near Luminous Quasars
• Gaseous Galactic Halos and QSO Absorption Line Systems
• Blueshifted [O III] Emission: Indications of a Dynamic NLR
• Chandra Detection of a TypeII Quasar at z=3.288
• Gas Metallicity in the Narrow-Line Regions of High-Redshift Active Galactic Nuclei
• The Obscured Fraction of AGN in the XMM-COSMOS Survey: A Spectral Energy Distribution Perspective
• Quasars Probing Quasars VI. Excess HI Absorption Within One Proper Mpc of z~2 Quasars
• Detection of dark galaxies and circum-galactic filaments fluorescently illuminated by a quasar at z=2.4
• Binary Quasars at High Redshift I: 24 New Quasar Pairs at z ~ 3-4
• Quasars Probing Quasars II: The Anisotropic Clustering of Optically Thick Absorbers around Quasars
• Discovery of a Large ~200 kpc Gaseous Nebula at z=2.7 with the Spitzer Space Telescope
• A Lyman-alpha blob in the GOODS South field: evidence for cold accretion onto a dark matter halo
• Imaging the Lyman-alpha Forest
• Kinematically quiet halos around z~2.5 radio galaxies. Keck spectroscopy
• A large population of mid-infrared selected, obscured active galaxies in the Bootes field
• Narrowband imaging of Escaping Lyman-Continuum Emission in the SSA22 Field
• The halo masses and galaxy environments of hyperluminous QSOs at z~2.7 in the Keck Baryonic Structure Survey
• Metal-enriched, sub-kiloparsec gas clumps in the circumgalactic medium of a faint z = 2.5 galaxy
• IGM Emission Observations with the Cosmic Web Imager: I. The Circum-QSO Medium of QSO 1549+19, and Evidence for a Filamentary Gas Inflow
• Quasars Probing Quasars III: New Clues to Feedback, Quenching, and the Physics of Massive Galaxy Formation
• On the Nature of Velocity Fields in High z Galaxies
• A Group of Galaxies at Redshift 2.38
• Quasars Probing Quasars VII. The Pinnacle of the Cool Circumgalactic Medium Surrounds Massive z~2 Galaxies
• Clustering of obscured and unobscured quasars in the Bootes field: Placing rapidly growing black holes in the cosmic web
• The Evolution of Ly-alpha Emitting Galaxies Between z = 2.1 and z = 3.1
• Extended Lyman Alpha Nebulae at z ~ 2.3: An Extremely Rare and Strongly Clustered Population?
• The Chandra Deep Protocluster Survey: Evidence for an Enhancement in the AGN Activity in the SSA22 Protocluster at z = 3.09
• Quasars Probing Quasars IV: Joint Constraints on the Circumgalactic Medium from Absorption and Emission
• Ly-alpha Emitting Galaxies at z = 2.1: Stellar Masses, Dust and Star Formation Histories from Spectral Energy Distribution Fitting
• The richness dependence of galaxy cluster correlations: Results from a redshift survey of rich APM clusters
• The Rest Frame Ultraviolet Spectra of UV-Selected Active Galactic Nuclei at z ~ 2-3
• A Substantial Mass of Cool, Metal-Enriched Gas Surrounding the Progenitors of Modern-Day Ellipticals
• The Spitzer mid-infrared AGN survey. I - optical and near-infrared spectroscopy of candidate obscured and normal AGN selected in the mid-infrared
• The most luminous quasars do not live in the most massive dark matter haloes at any redshift
• Evidence for Cold Accretion onto a Massive Galaxy at High Redshift?
• Narrowband Lyman-Continuum Imaging of Galaxies at z ~ 2.85
• Radiation pressure confinement - II. Application to the broad line region in active galactic nuclei
• The Overdense Environment of a Large Lyman-alpha Nebula at z~2.7
• Confronting Simulations of Optically Thick Gas in Massive Halos with Observations at z=2-3
• Constraints from Galaxy-AGN Clustering on the Correlation between Galaxy and Black Hole Mass at Redshifts 2<Z<3
• Very small-scale clustering of quasars from a complete quasar lens survey
• Binary Quasars at High Redshift II: Sub-Mpc Clustering at z ~ 3-4
• Resolving the optical emission lines of Lya blob 'B1' at z=2.38: another hidden quasar
• Radio spectra and polarisation properties of radio-loud Broad Absorption Line Quasars
• Constraints on Hyperluminous QSO Lifetimes via Fluorescent Lya Emitters at Z~2.7
• Galaxy Clusters in the Line of Sight to Background Quasars: I. Survey Design and Incidence of MgII Absorbers at Cluster Redshifts
• Spatially Resolved Gas Kinematics within a Ly$\alpha$ Nebula: Evidence for Large-scale Rotation
• Spitzer observations of extended Lyman-alpha Clouds in the SSA22 field
• Discovery of a Probable Physical Triple Quasar
• Giant Lyman-alpha nebulae around z>2 radio galaxies: evidence for infall
• The Keck+Magellan Survey for Lyman Limit Absorption II: A Case Study on Metallicity Variations
• Overturning the Case for Gravitational Powering in the Prototypical Cooling Lyman-alpha Nebula
• Orientation effects in quasar spectra: The broad- and narrow-line regions
• A VLA Survey of Radio-Selected SDSS Broad Absorption Line Quasars
• Caught in the Act: Discovery of a Physical Quasar Triplet
• Evidence for AGN-driven Outflows in Young Radio Quasars
• Giant Ly-alpha nebulae in the high redshift (z>2) Universe
• A Statistical Study of Emission Lines from High Redshift Radio Galaxies

Cited by in corpus (189)

• The realm of the galaxy protoclusters
• Ubiquitous giant Ly $\alpha$ nebulae around the brightest quasars at $z\sim 3.5$ revealed with MUSE
• The Quest for Dual and Binary Supermassive Black Holes: A Multi-Messenger View
• A Characteristic Scale for Cold Gas
• The WISE AGN Catalog
• Observations of the Lyman-$\alpha$ Universe
• Correcting CIV-Based Virial Black Hole Masses
• The Impact of Star Formation Feedback on the Circumgalactic Medium
• QSO MUSEUM I: A sample of 61 extended Ly$\alpha$-emission nebulae surrounding $z\sim 3$ quasars
• Properties of the Circumgalactic Medium in Cosmic Ray-Dominated Galaxy Halos
• How cold gas continuously entrains mass and momentum from a hot wind
• Nearly all the sky is covered by Lyman-alpha emission around high redshift galaxies
• Discovery of an Enormous Ly$\alpha$ nebula in a massive galaxy overdensity at $z=2.3$
• Evolution of the Cool Gas in the Circumgalactic Medium (CGM) of Massive Halos -- A Keck Cosmic Web Imager (KCWI) Survey of Ly$\alpha$ Emission around QSOs at $z\approx 2$
• The large and small scale properties of the intergalactic gas in the Slug Ly-alpha nebula revealed by MUSE HeII emission observations
• MApping the Most Massive Overdensities (MAMMOTH) II -- Discovery of an Extremely Massive Overdensity BOSS1441 at $z=2.32$
• Inspiraling Halo Accretion Mapped in Lyman-$\alpha$ Emission around a $z\sim 3$ Quasar
• The REQUIEM Survey I: A Search for Extended Ly-Alpha Nebular Emission Around 31 z>5.7 Quasars
• Survival and mass growth of cold gas in a turbulent, multiphase medium
• The physics of multiphase gas flows: fragmentation of a radiatively cooling gas cloud in a hot wind
• Ly$\alpha$ Spectra from Multiphase Outflows, and their Connection to Shell Models
• Outflows and complex stellar kinematics in SDSS star forming galaxies
• Three Lyman-alpha emitting filaments converging to a massive galaxy group at z=2.91: discussing the case for cold gas infall
• MAHALO Deep Cluster Survey I. Accelerated and enhanced galaxy formation in the densest regions of a protocluster at z=2.5
• Shadow of a Colossus: A z=2.45 Galaxy Protocluster Detected in 3D Ly-a Forest Tomographic Mapping of the COSMOS Field
• MApping the Most Massive Overdensities Through Hydrogen (MAMMOTH) I: Methodology
• MUSE searches for galaxies near very metal-poor gas clouds at z~3: new constraints for cold accretion models
• Deep HeII and CIV Spectroscopy of a Giant Lyman alpha Nebula: Dense Compact Gas Clumps in the Circumgalactic Medium of a z~2 Quasar
• The impact of magnetic fields on thermal instability
• MUSE Analysis of Gas around Galaxies (MAGG) -- III: The gas and galaxy environment of z = 3-4.5 quasars
• Is Multiphase Gas Cloudy or Misty?
• MAHALO Deep Cluster Survey II. Characterizing massive forming galaxies in the Spiderweb protocluster at z=2.2
• Quasars Probing Quasars VIII. The Physical Properties of the Cool Circumgalactic Medium Surrounding z ~ 2-3 Massive Galaxies Hosting Quasars
• Resonant line transfer in a fog: Using Lyman-alpha to probe tiny structures in atomic gas
• Molecular gas on large circumgalactic scales at z=3.47
• Characterising and Identifying Galaxy Protoclusters
• First Spectroscopic Study of a Young Quasar
• Modeling $237$ Lyman-$\alpha$ spectra of the MUSE-Wide survey
• The Circumgalactic Medium of Milky Way-like Galaxies in the TNG50 Simulation -- I: Halo Gas Properties and the Role of SMBH Feedback
• Keck/Palomar Cosmic Web Imagers (KCWI/PCWI) Reveal an Enormous Ly$\alpha$ Nebula in an Extremely Overdense QSO Pair Field at $z=2.45$
• The Stacked Lyman-Alpha Emission Profile from the Circum-Galactic Medium of z~2 Quasars
• Mapping the Lyman-Alpha Emission Around a z~6.6 QSO with MUSE: Extended Emission and a Companion at Close Separation
• On the contribution of fluorescence to Ly$\alpha$ halos (LAHs) around star forming galaxies
• Intensity mapping with SDSS/BOSS Lyman-alpha emission, quasars and their Lyman-alpha forest
• Detecting and Characterizing Young Quasars II: Four Quasars at $z\sim 6$ with Lifetimes $<10^4$ years
• Illuminating gas in-/outflows in the MUSE deepest fields: discovery of Ly-alpha nebulae around forming galaxies at z~3.3
• Constraining Galaxy Haloes from the Dispersion and Scattering of Fast Radio Bursts and Pulsars
• On the model of the circumgalactic mist: the implications of cloud sizes in galactic winds and halos
• SILVERRUSH. II. First Catalogs and Properties of ~2,000 Lya Emitters and Blobs at z~6-7 Identified over the 14-21 deg2 Sky
• Statistical Detection of the HeII Transverse Proximity Effect: Evidence for Sustained Quasar Activity for $>$25 Million Years
• Massive and supermassive black holes in the contemporary and early universe and the new problems of cosmology and astrophysics
• Ionised gas structure of 100 kpc in an over-dense region of the galaxy group COSMOS-Gr30 at z ~ 0.7
• Discovery of a faint, star-forming, multiply lensed, Lyman-alpha blob
• The Size-Luminosity Relationship of Quasar Narrow-Line Regions
• Jet-driven galaxy-scale gas outflows in the hyper-luminous quasar 3C273
• The MUSE Ultra Deep Field (MUDF). I. Discovery of a group of Ly$\alpha$ nebulae associated with a bright $z\approx 3.23$ quasar pair
• Strong Clustering of Lyman Break Galaxies around Luminous Quasars at z~4
• Stacking the Cosmic Web in Fluorescent Lyman alpha Emission with MUSE
• Radio wave scattering by circumgalactic cool gas clumps
• Gas Accretion and Giant Lyman-alpha Nebulae
• Ly$\alpha$ view around a z=2.84 hyperluminous QSO at a node of the cosmic web
• GN-z11: The environment of an AGN at $z=$10.603
• He II Proximity Effect and the Lifetime of Quasars
• Thermal Instability of Halo Gas Heated by Streaming Cosmic Rays
• Overdensity of submillimeter galaxies around the $z\simeq 2.3$ MAMMOTH-1 nebula
• Ly$\alpha$ Blobs from Cold Streams Undergoing Kelvin-Helmholtz Instabilities
• Evidence for Short $\sim 1$ Myr Lifetimes from the He II Proximity Zones of $z\sim 4$ Quasars
• 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?
• Discovery of a dual AGN at z~3.3 with 20kpc separation
• Revealing the Impact of Quasar Luminosity on Giant Ly$\alpha$ Nebulae
• Inspiraling streams of enriched gas observed around a massive galaxy 11 billion years ago
• Surface Brightness Profile of Lyman-$\alpha$ Halos out to 320 kpc in HETDEX
• A close quasar pair in a disk-disk galaxy merger at z = 2.17
• Metal line emission from galaxy haloes at z~1
• Enhancement of Galaxy Overdensity around Quasar Pairs at z<3.6 based on the Hyper Suprime-Cam Subaru Strategic Program Survey
• Extended and broad Lyman alpha emission around a BAL quasar at z~5
• Imaging Extended Emission-Line Regions of Obscured AGN with the Subaru Hyper Suprime-Cam Survey
• Active Galactic Nucleus Environments and Feedback to Neighboring Galaxies at $z\sim 5$ Probed by Lyman-Alpha Emitters
• Probing the existence of a rich galaxy overdensity at z=5.2
• Shatter or not: role of temperature and metallicity in the evolution of thermal instability
• The MOSDEF Survey: Environmental dependence of the gas-phase metallicity of galaxies at $1.4\le z\le 2.6$
• Radiative turbulent mixing layers at high Mach numbers
• A Trio of Massive Black Holes Caught in the Act of Merging
• Virial shocks are suppressed in cosmic ray-dominated galaxy halos
• Evaluating Lya Emission as a Tracer of the Largest Cosmic Structure at z~2.47
• Quasars Probing Quasars IX. The Kinematics of the Circumgalactic Medium Surrounding z ~ 2 Quasars
• Discovery of intergalactic bridges connecting two faint $z\sim 3$ quasars
• Detection of companion galaxies around hot dust-obscured hyper-luminous galaxy W0410-0913
• Spectroscopic Confirmation of two Extremely Massive Protoclusters BOSS1244 and BOSS1542 at $z=2.24$
• Statistical correlation between the distribution of Ly$\alpha$ emitters and IGM HI at $z\sim 2.2$ mapped by Subaru/Hyper Suprime-Cam
• The spectral and environment properties of $z\sim 2.0-2.5$ quasar pairs
• Revisiting the Gas Kinematics in SSA22 Lyman-$\alpha$ Blob 1 with Radiative Transfer Modeling in a Multiphase, Clumpy Medium
• Chandra reveals a luminous Compton-thick QSO powering a $Ly\alpha$ blob in a $z=4$ starbursting protocluster
• Unlocking the Full Potential of Extragalactic Ly$\alpha$ through Its Polarization Properties
• Cooling driven coagulation
• A hidden active galactic nucleus powering bright [O III] nebulae in a protocluster at $z=4.5$ revealed by JWST
• Dating individual quasars with the HeII proximity effect
• The cold circumgalactic environment of MAMMOTH-I: dynamically cold gas in the core of an Enormous Ly-alpha Nebula
• The Detection of Intergalactic Halpha Emission from the Slug Nebula at z~2.3
• Gas inflow and outflow in an interacting high-redshift galaxy: The remarkable host environment of GRB 080810 at $z=3.35$
• Probing the AGN Unification Model at redshift z $\sim$ 3 with MUSE observations of giant Ly$\alpha$ nebulae
• Into the Lyα jungle: exploring the circumgalactic medium of galaxies at z ~ 4-5 with MUSE
• Giant Lyman-Alpha Nebulae in the Illustris Simulation
• A high baryon fraction in massive haloes at z~3
• A Multiwavelength Study of ELAN Environments (AMUSE${}^2$): Detection of a dusty star-forming galaxy within the enormous Lyman $\alpha$ nebula at $z=2.3$ sheds light on its origin
• A Multiwavelength Study of ELAN Environments (AMUSE${}^2$). Mass budget, satellites spin alignment and gas infall in a massive $z\sim 3$ quasar host halo
• Extended Ly$\alpha$ emission around quasars with eclipsing damped Ly$\alpha$ systems
• A new model framework for circumgalactic Ly$\alpha$ radiative transfer constrained by galaxy-Ly$\alpha$ forest clustering
• Dissecting the complex environment of a distant quasar with MUSE
• Radiative Transfer in Lyα Nebulae: I. Modeling a Continuous or Clumpy Spherical Halo with a Central Source
• Properties of the interstellar medium in star-forming galaxies at redshifts 2 < z < 5 from the VANDELS survey
• Quasars probing quasars X: The quasar pair spectral database
• A Multiwavelength Study of ELAN Environments (AMUSE${}^2$): Ubiquitous dusty star-forming galaxies associated with enormous Ly$\alpha$ nebulae on megaparsec scales
• Cold and Hot gas distribution around the Milky-Way-M31 system in the HESTIA simulations
• MUSE-inspired view of the quasar Q2059-360, its Lyman alpha blob, and its neighborhood
• ALMA Observations of Lyman-alpha Blob 1: Multiple major-mergers and widely distributed interstellar media
• A Long Stream of Metal-Poor Cool Gas around a Massive Starburst Galaxy at z = 2.67
• Tentative Detection of the Circumgalactic Medium of the Isolated Low-Mass Dwarf Galaxy WLM
• Cosmological 3D HI Gas Map with HETDEX Ly$\alpha$ Emitters and eBOSS QSOs at $z=2$: IGM-Galaxy/QSO Connection and a $\sim$ 40-Mpc Scale Giant HII Bubble Candidate
• Three- and two-point spatial correlations of intergalactic medium at $z\sim 2$ using projected quasar triplets
• Discovery of a Lya emitting dark-cloud within z ~ 2.8 SMMJ02399-0136 system
• APEX at the QSO MUSEUM: molecular gas reservoirs associated with $z\sim$3 quasars and their link to the extended Ly$\alpha$ emission
• Characterizing the Circumgalactic Medium of Quasars at z $\sim$ 2.2 through H$\alpha$ and Ly$\alpha$ Emission
• Cold Mode Gas Accretion on Two Galaxy Groups at z$\sim$2
• Discovery of a giant and luminous Lya+CIV+HeII nebula at z=3.326 with extreme emission line ratios
• Prospects for Observing the low-density Cosmic Web in Lyman-alpha Emission
• The circum-galactic medium of quasars: CIV absorption systems
• Spatially Resolved Patchy Lyman-$\alpha$ Emission Within the Central Kiloparsec of a Strongly Lensed Quasar Host Galaxy at z = 2.8
• The density distribution of accreting cosmic filaments as shaped by Kelvin-Helmholtz instability
• Discovery of a protocluster core associated with an enormous Ly$\alpha$ Nebula at $z=2.3$
• An overdensity of red galaxies around the hyperluminous dust-obscured quasar W1835$+$4355 at $z=2.3$
• Probing the Diffuse Lyman-alpha Emission on Cosmological Scales: Lyα Emission Intensity Mapping Using the Complete SDSS-IV eBOSS Survey
• A search for dust and molecular gas in enormous Ly$\alpha$ nebulae at $z\approx 2$
• Massive Primordial Black Holes in Contemporary and Young Universe (old predictions and new data)
• The SUPERCOLD-CGM survey: \\ I. Probing the extended CO(4-3) Emission of the Circumglactic medium in a sample of 10 Enormous Ly$\alpha$ Nebulae at $z\sim 2$
• Circumgalactic Ly$\alpha$ emission around submillimeter-bright galaxies with different quasar contributions
• Narrow C IV absorption doublets on quasar spectra of the Baryon Oscillation Spectroscopic Survey
• The Study of Circumgalactic Medium with Quasar Pairs
• The Ly$\alpha$, CIV, and HeII nebulae around J1000+0234: a galaxy pair at the center of a galaxy overdensity at $z=4.5$
• Detecting the Cosmic Web: Lyα Emission from Simulated Filaments at z=3
• JCMT/SCUBA-2 uncovers an excess of $850\mu$m counts on megaparsec scales around high-redshift quasars. Characterization of the overdensities and their alignment with the quasars' Ly$\alpha$ nebulae
• The circumgalactic medium in Lyman-alpha: a new constraint on galactic outflow models
• QSO MUSEUM II: Search for extended Ly$\alpha$ emission around eight $z\sim 3$ quasar pairs
• Multiplicity functions of quasars: Predictions from the MassiveBlackII simulation
• Simulations of Weakly Magnetized Turbulent Mixing Layers
• The WISSH quasars project VII. Outflows and metals in the circumgalactic medium around the hyper-luminous z~3.6 quasar J1538+08
• Direct high-resolution observation of feedback and chemical enrichment in the circumgalactic medium at redshift z ~ 2.8
• Connecting the growth of galaxies to the large-scale environment in a massive node of the Cosmic Web at z~3
• Possible evolution of the circum-galactic medium around QSOs with QSO age and cosmic time revealed by Ly$\alpha$ halos
• Overdensity of galaxies in the environment of quasar pairs
• Beasts in Lambda-CDM Zoo
• Resolving the Internal Structure of Circum-Galactic Medium using Gravitationally Lensed Quasars
• Triple and Quadruple Black Holes in the ASTRID Simulation at $z\sim 2$
• Observational Diagnostics of Gas Flows: Insights from Cosmological Simulations
• Refractive lensing of scintillating FRBs by sub-parsec cloudlets in the multi-phase CGM
• AGN feedback in an infant galaxy cluster: the LOFAR-Chandra view of the giant FRII radio galaxy J103025+052430 at z=1.7
• Simulated [CII] in high-z galaxies
• The luminosity-area relation of $z>2$ quasars' Ly$\alpha$ nebulae
• Photometric IGM Tomography: Efficiently Mapping Quasar Light Echoes with Deep Narrow Band Imaging
• Astrophysics with the Laser Interferometer Space Antenna
• Are there more galaxies than we see around high-$z$ quasars?
• The miniJPAS Survey: Detection of double-core Lyα morphology of two high-redshift (z>3) QSOs
• Lyman-$\alpha$ emission from a WISE-selected optically faint powerful radio galaxy M151304.72-252439.7 at $z$ = 3.132
• Search for extended Lyman-$\alpha$ emission around 9k quasars at z=2-3
• Prospects for detecting cosmic filaments in Lyman-alpha emission across redshifts $z=2-5$
• Circumgalactic Ly$\alpha$ Nebulae in Overdense Quasar Pair Regions Observed with the Palomar Cosmic Web Imager
• A unique window into the Epoch of Reionisation: A double-peaked Lyman-$\alpha$ emitter in the proximity zone of a quasar at $z\sim 6.6$
• Problems with the sources of the observed gravitational waves and their resolution
• Revealing the Warm and Hot Halo Baryons via Thomson Scattering of Quasar Light
• Euclid preparation. Exploring the properties of proto-clusters in the Simulated Euclid Wide Survey
• Quasar lifetime measurements from extended Ly$\alpha$ nebulae at $z\sim 6$
• A candidate quadruple AGN system at $z\sim 3$
• CGM cloud sizes from refractive FRB scattering
• An ALMA spectroscopic survey of the Planck high-redshift object PLCK G073.4-57.5 confirms two protoclusters
• 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
• Leaked Lya emission: an indicator of the size of quasar absorption outflows
• Brighter and More Massive Galaxies in the Vicinity of Lyman-alpha Nebulae
• Massive Primordial Black Holes
• A meeting at z~3: Young massive galaxies and an AGN within 30kpc of the luminous QSO LBQS0302-0019
• Submillimeter galaxy overdensities around physically associated quasar pairs
• ZFIRE -- The Gas Inflow Inequality for Satellite Galaxies in Cluster and Field Halos at z = 2
• J-PAS: Discovery of RaJav, a bright spatially extended Ly$\alpha$ Nebula at z=2.25
• Prospects for constraining quasar ages with fiber spectrographs: quasar-induced Ly$\alpha$ emission from the intergalactic medium
• Candidate cosmic filament in the GJ526 field, mapped with the NIKA2 camera
• ODIN: A New Lyman Alpha Blob Selection Method, Sample, and Statistical Analysis at $z\sim 3.1$
• Resolving circumgalactic gas flows around a z$\approx$3.6 quasar using MUSE and ALMA
• Constraints on cosmic rays in the Milky Way circumgalactic medium from OVIII observations
• Intergalactic Medium Tomography with the Sunburst Arc
• Dual AGN in the Horizon-AGN simulation and their link to galaxy and massive black hole mergers, with an excursus on multiple AGN