Quantitative Constraints on the Reionization History from the IGM Damping Wing Signature in Two Quasars at z > 7

Abstract

During reionization, neutral hydrogen in the intergalactic medium (IGM) imprints a damping wing absorption feature on the spectrum of high-redshift quasars. A detection of this signature provides compelling evidence for a significantly neutral Universe, and enables measurements of the hydrogen neutral fraction $x_{\mathrm{HI}}(z)$ at that epoch. Obtaining reliable quantitative constraints from this technique, however, is challenging due to stochasticity induced by the patchy inside-out topology of reionization, degeneracies with quasar lifetime, and the unknown unabsorbed quasar spectrum close to rest-frame Ly$\alpha$. We combine a large-volume semi-numerical simulation of reionization topology with 1D radiative transfer through high-resolution hydrodynamical simulations of the high-redshift Universe to construct models of quasar transmission spectra during reionization. Our state-of-the-art approach captures the distribution of damping wing strengths in biased quasar halos that should have reionized earlier, as well as the erosion of neutral gas in the quasar environment caused by its own ionizing radiation. Combining this detailed model with our new technique for predicting the quasar continuum and its associated uncertainty, we introduce a Bayesian statistical method to jointly constrain the neutral fraction of the Universe and the quasar lifetime from individual quasar spectra. We apply this methodology to the spectra of the two highest redshift quasars known, ULAS J1120+0641 and ULAS J1342+0928, and measured volume-averaged neutral fractions $⟨x_{\mathrm{HI}}⟩(z=7.09)=0.48_{-0.26}^{+0.26}$ and $⟨x_{\mathrm{HI}}⟩(z=7.54)=0.60_{-0.23}^{+0.20}$ (posterior medians and 68% credible intervals) when marginalized over quasar lifetimes of $10^3\le t_{\mathrm{q}}\le 10^8$ years.

arXiv comment18 pages, 13 figures. Submitted to ApJ

References in corpus (70)

• The UKIRT Infrared Deep Sky Survey (UKIDSS)
• 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
• UV Luminosity Functions at redshifts z~4 to z~10: 10000 Galaxies from HST Legacy Fields
• Radiative transfer in a clumpy universe: IV. New synthesis models of the cosmic UV/X-ray background
• An 800-million-solar-mass black hole in a significantly neutral Universe at redshift 7.5
• 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
• Evidence for Reionization at z ~ 6: Detection of a Gunn-Peterson Trough in a z=6.28 Quasar
• Cosmic Reionization and Early Star-Forming Galaxies: A Joint Analysis of New Constraints from Planck and Hubble Space Telescope
• 21cmFAST: A Fast, Semi-Numerical Simulation of the High-Redshift 21-cm Signal
• A Survey of z>5.7 Quasars in the Sloan Digital Sky Survey II: Discovery of Three Additional Quasars at z>6
• The Growth of HII Regions During Reionization
• The Rest-Frame Extreme Ultraviolet Spectral Properties of QSOs
• Model-independent evidence in favor of an end to reionization by z~6
• On the evolution of the HI column density distribution in cosmological simulations
• Efficient Simulations of Early Structure Formation and Reionization
• The Sloan Digital Sky Survey Quasar Catalog: twelfth data release
• Probing the Universe with the Lyman-alpha Forest: I. Hydrodynamics of the Low Density IGM
• Planck intermediate results. XLVI. Reduction of large-scale systematic effects in HFI polarization maps and estimation of the reionization optical depth
• The Pan-STARRS1 distant z>5.6 quasar survey: more than 100 quasars within the first Gyr of the universe
• Reionization of the Intergalactic Medium and the Damping Wing of the Gunn-Peterson Trough
• The Universe is Reionizing at z~7: Bayesian Inference of the IGM Neutral Fraction Using Ly$\alpha$ Emission from Galaxies
• Physical properties of 15 quasars at $z\gtrsim 6.5$
• Discovery of three z>6.5 quasars in the VISTA Kilo-degree Infrared Galaxy (VIKING) survey
• Probing the Ionization State of the Universe at z>6
• Nyx: A Massively Parallel AMR Code for Computational Cosmology
• The first ultraviolet quasar stacked spectrum at z=2.4 from WFC3
• How neutral is the intergalactic medium surrounding the redshift z=7.085 quasar ULAS J1120+0641?
• The Giant Gemini GMOS survey of z>4.4 quasars - I. Measuring the mean free path across cosmic time
• The Lyman-$\alpha$ forest in optically-thin hydrodynamical simulations
• The identification of z-dropouts in Pan-STARRS1: three quasars at 6.5<z<6.7
• The UKIRT Hemisphere Survey: Definition and J-band Data Release
• The nature and evolution of the highly ionized near-zones in the absorption spectra of z~6 quasars
• Quasar Strömgren Spheres Before Cosmological Reionization
• Evidence of Gunn-Peterson damping wings in high-z quasar spectra: strengthening the case for incomplete reionization
• HST-COS Observations of AGN. II. Extended Survey of Ultraviolet Composite Spectra from 159 Active Galactic Nuclei
• Eight new luminous z > 6 quasars selected via SED model fitting of VISTA, WISE and Dark Energy Survey Year 1 Observations
• Copious Amounts of Dust and Gas in a z=7.5 Quasar Host Galaxy
• A Principal Component Analysis of quasar UV spectra at z~3
• Improved measurements of the intergalactic medium temperature around quasars: possible evidence for the initial stages of He-II reionisation at z~6
• The redshift evolution of escape fraction of hydrogen ionizing photons from galaxies
• Secondary ionization and heating by fast electrons
• Lyα emission line reconstruction for high-$z$ QSOs
• The Evolution of 21-cm Structure (EOS): public, large-scale simulations of Cosmic Dawn and Reionization
• Quasar Proximity Zones and Patchy Reionization
• The compact, ~1 kpc host galaxy of a quasar at z=7.1
• Bayesian Indirect Inference Using a Parametric Auxiliary Model
• An unbiased measurement of the UV background and its evolution via the proximity effect in quasar spectra
• Extremely metal-poor gas at a redshift of 7
• Characterizing the Pressure Smoothing Scale of the Intergalactic Medium
• First Discoveries of z>6 Quasars with the DECam Legacy Survey and UKIRT Hemisphere Survey
• Predicting QSO Continua in the Ly Alpha Forest
• Lyman-alpha Damping Wing Constraints on Inhomogeneous Reionization
• Improved Constraints on The Neutral Intergalactic Hydrogen Surrounding Quasars at Redshifts z>6
• Predicting Quasar Continua Near Lyman-$\alpha$ with Principal Component Analysis
• SILVERRUSH. VI. A simulation of Ly$\alpha$ emitters in the reionization epoch and a comparison with Subaru Hyper Suprime-Cam survey early data
• Constraints on Reionization and Source Properties from the Absorption Spectra of z>6.2 Quasars
• A New Method to Measure the Post-Reionization Ionizing Background from the Joint Distribution of Lyman-$\alpha$ and Lyman-$\beta$ Forest Transmission
• A New Method to Directly Measure the Jeans Scale of the Intergalactic Medium Using Close Quasar Pairs
• Quasar Ionization Front Lyα Emission in an Inhomogeneous Intergalactic Medium
• Statistical Detection of the HeII Transverse Proximity Effect: Evidence for Sustained Quasar Activity for $>$25 Million Years
• Re-examining the case for neutral gas near the redshift 7 quasar ULAS J1120+0641
• Probing the end of reionization with the near-zones of z > 6 QSOs
• Quasar H II Regions During Cosmic Reionization
• He II Proximity Effect and the Lifetime of Quasars
• Modeling the HeII Transverse Proximity Effect: Constraints on Quasar Lifetime and Obscuration
• A Fundamental Test for Galaxy Formation Models: Matching the Lyman-$\alpha$ Absorption Profiles of Galactic Halos over Three Decades in Distance
• The Thermal Proximity Effect: A New Probe of He II Reionization History and the Quasar Lifetime
• Probing Reionization with Quasar Spectra: the Impact of the Intrinsic Lyman-alpha Emission Line Shape Uncertainty

Cited by in corpus (211)

• Planck 2018 results. I. Overview and the cosmological legacy of Planck
• A Luminous Quasar at Redshift 7.642
• JADES NIRSpec Spectroscopy of GN-z11: Lyman-$\alpha$ emission and possible enhanced nitrogen abundance in a $z=10.60$ luminous galaxy
• Pōniuā'ena: A Luminous $z=7.5$ Quasar Hosting a 1.5 Billion Solar Mass Black Hole
• Improved upper limits on the 21-cm signal power spectrum of neutral hydrogen at $\mathbf{z}\approx 9.1$ from LOFAR
• Hydrogen reionisation ends by $z=5.3$: Lyman-$\alpha$ optical depth measured by the XQR-30 sample
• Rapid Reionization by the Oligarchs: The Case for Massive, UV-Bright, Star-Forming Galaxies with High Escape Fractions
• The GLASS James Webb Space Telescope Early Release Science Program. I. Survey Design and Release Plans
• Large Lyman-alpha opacity fluctuations and low CMB tau in models of late reionization with large islands of neutral hydrogen extending to z<5.5
• Introducing the THESAN project: radiation-magnetohydrodynamic simulations of the epoch of reionization
• A Cosmic UV/X-ray Background Model Update
• Galaxy Formation and Reionization: Key Unknowns and Expected Breakthroughs by the James Webb Space Telescope
• First Results from HERA Phase I: Upper Limits on the Epoch of Reionization 21 cm Power Spectrum
• A JWST/NIRCam Study of Key Contributors to Reionization: The Star-forming and Ionizing Properties of UV-faint $z\sim 7-8$ Galaxies
• A Significantly Neutral Intergalactic Medium Around the Luminous z=7 Quasar J0252-0503
• 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 $z\sim 6.7$
• Constraints on reionisation from the z=7.5 QSO ULASJ1342+0928
• HERA Phase I Limits on the Cosmic 21-cm Signal: Constraints on Astrophysics and Cosmology During the Epoch of Reionization
• The mean free path of ionizing photons at 5 < z < 6: evidence for rapid evolution near reionization
• New synthesis models of consistent extragalactic background light over cosmic time
• Revealing reionization with the thermal history of the intergalactic medium: new constraints from the Lyman-$\alpha$ flux power spectrum
• The Discovery of A Luminous Broad Absorption Line Quasar at A Redshift of 7.02
• Measurements of the z ~ 6 Intergalactic Medium Optical Depth and Transmission Spikes Using a New z > 6.3 Quasar Sample
• The ASTRID Simulation: Galaxy Formation and Reionization
• The THESAN project: properties of the intergalactic medium and its connection to Reionization-era galaxies
• Reionization and galaxy inference from the high-redshift Lyα forest
• Observing the tail of reionization: neutral islands in the $z=5.5$ Lyman-$\alpha$ Forest
• The THESAN project: Lyman-alpha emission and transmission during the Epoch of Reionization
• LyC escape from SPHINX galaxies in the Epoch of Reionization
• The JWST-PRIMAL Legacy Survey. A JWST/NIRSpec reference sample for the physical properties and Lyman-$\alpha$ absorption and emission of $\sim 500$ galaxies at $z=5.5-13.4$
• The Obelisk simulation: galaxies contribute more than AGN to HI reionization of protoclusters
• Long Dark Gaps in the Ly$\beta$ Forest at $z<6$: Evidence of Ultra Late Reionization from XQR-30 Spectra
• IGM damping wing constraints on reionisation from covariance reconstruction of two $z\gtrsim 7$ QSOs
• Tight Constraints on the Excess Radio Background at $z=9.1$ from LOFAR
• (Nearly) Model-Independent Constraints on the Neutral Hydrogen Fraction in the Intergalactic Medium at $z\sim 5-7$ Using Dark Pixel Fractions in Ly$\alpha$ and Ly$\beta$ Forests
• MMT Spectroscopy of Lyman-alpha at z$\simeq$7: Evidence for Accelerated Reionization Around Massive Galaxies
• Measuring the properties of reionised bubbles with resolved Lyman alpha spectra
• Interpreting LOFAR 21-cm signal upper limits at z~9.1 in the context of high-z galaxy and reionisation observations
• Evidence for Low Radiative Efficiency or Highly Obscured Growth of $z>7$ Quasars
• Euclid preparation: V. Predicted yield of redshift 7<z<9 quasars from the wide survey
• Predicting Quasar Continua Near Lyman-$\alpha$ with Principal Component Analysis
• The Impact of Scatter in the Galaxy UV Luminosity to Halo Mass Relation on Ly$\alpha$ Visibility During the Epoch of Reionization
• Model-independent constraints on the hydrogen-ionizing emissivity at z>6
• The THESAN project: ionizing escape fractions of reionization-era galaxies
• Chasing the Tail of Cosmic Reionization with Dark Gap Statistics in the Ly$\alpha$ Forest over $5<z<6$
• Heating of the Intergalactic Medium by Hydrogen Reionization
• The Lyman-$\alpha$ forest as a diagnostic of the nature of the dark matter
• Inferring the IGM Neutral Fraction at z ~ 6-8 with Low-Luminosity Lyman Break Galaxies
• (Re)Solving Reionization with Lyα: How Bright Lyα Emitters account for the $z\approx 2-8$ Cosmic Ionizing Background
• Hydrodynamic Response of the Intergalactic Medium to Reionization
• Exploring reionisation and high-z galaxy observables with recent multi-redshift MWA upper limits on the 21-cm signal
• A short mean free path at $z=6$ favors late and rapid reionization by faint galaxies
• The Sherwood-Relics simulations: overview and impact of patchy reionization and pressure smoothing on the intergalactic medium
• Results from EDGES High-Band: III. New Constraints on Parameters of the Early Universe
• Strong Ly$\alpha$ Emission in an Overdense Region at $z=6.8$: A Very Large ($R\sim 3$ physical Mpc) Ionized Bubble in COSMOS?
• Early Structure Formation Constraints on the Ultra-Light Axion in the Post-Inflation Scenario
• Constraining the state of the intergalactic medium during the Epoch of Reionization using MWA 21-cm signal observations
• Reionization history constraints from neural network based predictions of high-redshift quasar continua
• Time-dependent behaviour of quasar proximity zones at $z\sim 6$
• The production of ionizing photons in UV-faint z~3-7 galaxies
• Lyman-$\alpha$ as a tracer of cosmic reionisation in the SPHINX radiation-hydrodynamics cosmological simulation
• Supermassive Black Holes in the Early Universe
• The impact of an evolving stellar initial mass function on early galaxies and reionisation
• Fuzzy Dark Matter and the 21cm Power Spectrum
• Chronicling the reionization history at $6\lesssim z\lesssim 7$ with emergent quasar damping wings
• ALMA and HST kiloparsec-scale imaging of a quasar-galaxy merger at $z\approx 6.2$
• No Redshift Evolution in the Broad Line Region Metallicity up to z=7.54: Deep NIR Spectroscopy of ULAS J1342+0928
• A metal-poor damped Ly-alpha system at redshift 6.4
• Damping Wing-Like Features in the Stacked Ly$\alpha$ Forest: Potential Neutral Hydrogen Islands at $z<6$
• A comparison of quasar emission reconstruction techniques for $z\ge 5.0$ Lyman-$\alpha$ and Lyman-$\beta$ transmission
• The ALMA REBELS Survey: Efficient Ly$\alpha$ Transmission of UV-Bright z$\simeq$7 Galaxies from Large Velocity Offsets and Broad Line Widths
• Constraining the second half of reionization with the Lyman-$\beta$ forest
• Probing Cosmic Reionization and Molecular Gas Growth with TIME
• Damping wings in the Lyman-α forest: a model-independent measurement of the neutral fraction at 5.4<z<6.1
• Inhomogeneous Reionization Models in Cosmological Hydrodynamical Simulations
• Lyman-alpha opacities at z=4-6 require low mass, radiatively-suppressed galaxies to drive cosmic reionization
• The Evolution of the HeII-Ionizing Background at Redshifts 2.3<z<3.8 Inferred from a Statistical Sample of 24 HST/COS HeII Ly$\alpha$ Absorption Spectra
• SILVERRUSH XI: Constraints on the Ly$\alpha$ luminosity function and cosmic reionization at $z=7.3$ with Subaru/Hyper Suprime-Cam
• The Predicament of Absorption-Dominated Reionization: Increased Demands on Ionizing Sources
• Estimating the effective lifetime of the $z\sim 6$ quasar population from the composite proximity zone profile
• The XQR-30 Metal Absorber Catalog: 778 Absorption Systems Spanning 2 < z < 6.5
• Inferring the Thermal History of the Intergalactic Medium from the Properties of the Hydrogen and Helium Lyman-alpha Forest
• Constraints on the End of Reionization from the Density Fields Surrounding Two Highly Opaque Quasar Sightlines
• Deep learning approach for identification of HII regions during reionization in 21-cm observations
• Constraining the reionization history using deep learning from 21cm tomography with the Square Kilometre Array
• Lyman-alpha transmission properties of the intergalactic medium in the CoDaII simulation
• Constraining the primordial magnetic field with dwarf galaxy simulations
• The Universe is at Most 88% Neutral at z=10.6
• Limits to Rest-Frame Ultraviolet Emission From Far-Infrared-Luminous z~6 Quasar Hosts
• Measuring the reionization optical depth without large-scale CMB polarization
• Dark-ages Reionization and Galaxy Formation Simulation XX. The Ly$\alpha$ IGM transmission properties and environment of bright galaxies during the Epoch of Reionization
• The Infrared Medium-deep Survey. VIII. Quasar Luminosity Function at $z\sim 5$
• The need for obscured supermassive black hole growth to explain quasar proximity zones in the epoch of reionization
• SuperBoRG: Exploration of point sources at $z\sim 8$ in HST parallel fields
• The space density of ultra-luminous QSOs at the end of reionization epoch by the QUBRICS Survey and the AGN contribution to the hydrogen ionizing background
• UNCOVERing the contribution of black holes to reionization in the JWST era
• Predictions for measuring the 21-cm multi-frequency angular power spectrum using SKA-Low
• The host galaxies of z=7 quasars: predictions from the BlueTides simulation
• The Goldilocks problem of the quasar contribution to reionization
• Future Constraints on the Reionization History and the Ionizing Sources from Gamma-ray Burst Afterglows
• "Little red dots" cannot reside in the same dark matter halos as comparably luminous unobscured quasars
• Deeper multi-redshift upper limits on the Epoch of Reionization 21-cm signal power spectrum from LOFAR between z=8.3 and z=10.1
• Probing the thermal history during reionization using a semi-numerical photon-conserving code SCRIPT
• A unified model for the clustering of quasars and galaxies at $z\approx 6$
• The effect of inhomogeneous reionisation on the Lyman-$\alpha$ forest power spectrum at redshift $z>4$: implications for thermal parameter recovery
• The impact of inhomogeneous subgrid clumping on cosmic reionization II: modelling stochasticity
• Metal enrichment and evolution in four z > 6.5 quasar sightlines observed with JWST/NIRSpec
• The 21 cm-kSZ-kSZ Bispectrum during the Epoch of Reionization
• Examining the Decline in the C IV Content of the Universe over 4.3 < z < 6.3 using the E-XQR-30 Sample
• Mapping quasar light echoes in 3D with Lyα forest tomography
• SuperBoRG: Search for The Brightest of Reionizing Galaxies and Quasars in HST Parallel Imaging Data
• Constraining the Tail-End of Reionization Using Lyman-$\alpha$ Transmission Spikes
• Improved treatments of the ionizing photon mean free path in semi-numerical simulations of reionization
• LIMFAST. II. Line Intensity Mapping as a Probe of High-Redshift Galaxy Formation
• The Morphology of Reionization in a Dynamically Clumpy Universe
• LIMFAST. I. A Semi-Numerical Tool for Line Intensity Mapping
• The Epoch of Reionization 21-cm Bispectrum: The impact of light-cone effects and detectability
• CLEAR: Boosted Ly$\alpha$ Transmission of the Intergalactic Medium in UV bright Galaxies
• The impact of non-Gaussianity on the Epoch of Reionization parameter forecast using 21-cm power spectrum measurements
• Extracting HI Astrophysics from Interferometric Intensity Mapping
• New quasar proximity zone size measurements at $z\sim 6$ using the enlarged XQR-30 sample
• Statistical analysis of the causes of excess variance in the 21 cm signal power spectra obtained with the Low-Frequency Array
• A blazar in the epoch of reionization
• Effects of Photoionization and Photoheating on Lyman-alpha Forest Properties from Cholla Cosmological Simulations
• Large-scale variation in reionization history caused by Baryon-dark matter streaming velocity
• Constraining the reionization and thermal history of the Universe using a semi-numerical photon-conserving code SCRIPT
• Constraining the Gravitational Lensing of $z\gtrsim 6$ Quasars from their Proximity Zones
• Quasar Factor Analysis -- An Unsupervised and Probabilistic Quasar Continuum Prediction Algorithm with Latent Factor Analysis
• Constraining Reionization in Progress at z=5.7 with Lyman-$\alpha$ Emitters: Voids, Peaks, and Cosmic Variance
• Methods of Error Estimation for Delay Power Spectra in $21\text{cm}$ Cosmology
• Accretion History of AGN III: Radiative Efficiency and AGN Contribution to Reionization
• Joining bits and pieces of reionization history
• First study of reionization in tilted flat and untilted non-flat dynamical dark energy inflation models
• A Model-Insensitive Baryon Acoustic Oscillation Feature in the 21 cm Signal from Reionization
• Revised estimates of CMB $B$-mode polarization induced by patchy reionization
• Probing Reionization and Early Cosmic Enrichment with the MgII Forest
• Cosmic Reionization History and Dark Matter Scenarios
• Astraeus III: The environment and physical properties of reionization sources
• Constraints on the $z\sim 6-13$ intergalactic medium from JWST spectroscopy of Lyman-alpha damping wings in galaxies
• Constraining reionization with the first measurement of the cross-correlation between the CMB optical-depth fluctuations and the Compton y-map
• Late-end reionization with ATON-HE: towards constraints from Lyman-$\alpha$ emitters observed with JWST
• Modelling the star-formation activity and ionizing properties of high-redshift galaxies
• Prospects for kSZ${}^2$-Galaxy Cross-Correlations during Reionization
• The Infrared Medium-deep Survey. \Romannum{7}. Faint Quasars at $z\sim 5$ in the ELAIS-N1 Field
• Conditions for direct black hole seed collapse near a radio-loud quasar 1 Gyr after the Big Bang
• Implications of the $z>5$ Lyman-$\alpha$ forest for the 21-cm power spectrum from the epoch of reionization
• Gaussian Process Reconstruction of Reionization History
• Beyond optical depth: Future determination of ionization history from the CMB
• Lyman-alpha Emitters in Ionized Bubbles: Constraining the Environment and Ionized Fraction
• Paving the Way for Euclid and JWST via Optimal Selection of High-z Quasars
• Constraints on small-scale primordial density fluctuation from cosmic microwave background through dark matter annihilation
• Mapping reionization bubbles in the JWST era I: empirical edge detection with Lyman alpha emission from galaxies
• The Role of Quasar Radiative Feedback on Galaxy Formation during Cosmic Reionization
• The Impact of Cosmic Variance on Inferences of Global Neutral Fraction Derived from Ly$\alpha$ Luminosity Functions During Reionization
• Eddington accreting Black Holes in the Epoch of Reionization
• The impact of faint AGN discovered by JWST on reionization
• Thermal and Reionisation History within a Large-Volume Semi-Analytic Galaxy Formation Simulation
• The first molecules in the intergalactic medium and halos of the Dark Ages and Cosmic Dawn
• Probing quasar lifetimes with proximate $21$-centimetre absorption in the diffuse intergalactic medium at redshifts $z\ge 6$
• Extracting the astrophysics of reionization from the Ly$\alpha$ forest power spectrum: a first forecast
• A Generative Model for Quasar Spectra
• Non-parametric Reconstruction of Photon Escape Fraction from Reionization
• Probing the Early History of Cosmic Reionization by Future Cosmic Microwave Background Experiments
• Black hole virial masses from single-epoch photometry: the miniJPAS test case
• Can galaxy evolution mimic cosmic reionization?
• Understanding the Impact of Semi-numeric Reionization Models when using CNNs
• Detectability of the ${\tau }_{es}$-21cm cross-correlation: a tomographic probe of patchy reionization
• Dark Twilight Joined with the Light of Dawn to Unveil the Reionization History
• Characterising SMSS J2157--3602, the most luminous known quasar, with accretion disc models
• Probing Reionization-Era Galaxies with JWST UV Luminosity Functions and Large-Scale Clustering
• Optical and near-infrared spectroscopy of quasars at $z>6.5$: public data release and composite spectrum
• Explaining JWST star formation history at $z\sim 17$ by modifying $\Lambda$CDM
• Deep Learning Prediction of Quasars Broad Ly$\alpha$ Emission Line
• The Lyman-limit photon mean free path at the end of late reionisation in the Sherwood-Relics simulations
• Studying the Multi-frequency Angular Power Spectrum of the Cosmic Dawn 21-cm Signal
• The miniJPAS Survey: Detection of double-core Lyα morphology of two high-redshift (z>3) QSOs
• Can an Anti-de Sitter Vacuum in the Dark Energy Sector Explain JWST High-Redshift Galaxy and Reionization Observations?
• Impact of the primordial fluctuation power spectrum on the reionization history
• Global signal in the redshifted hydrogen 21-cm line from the Dark Ages and Cosmic Dawn: Dependence on the nature of dark matter and modeling of first light
• Population III star explosions and Planck 2018 data
• Effects of Small-Scale Absorption Systems on Neutral Islands during the Late Epoch of Reionization
• Clues to the nature of dark matter from first galaxies
• High-redshift AGN population in radiation-hydrodynamics simulations
• Narrowing the discovery space of the cosmological 21-cm signal using multi-wavelength constraints
• Reionizing islands with inhomogeneous recombinations
• Model-independent Reconstruction of UV Luminosity Function and Reionization Epoch
• Lyman-$\alpha$ polarization from cosmological ionization fronts: II. Implications for intensity mapping
• The impact of cosmic ray feedback during the epoch of reionisation
• Ly$\alpha$ Emission from [OIII] Emitters Near Reionization: The role of environment in galaxy Ly$\alpha$ detection
• What can we learn about Reionization astrophysical parameters using Gaussian Process Regression?
• Reionization in Protocluster Environments at $z>7$ with JWST/NIRSpec
• ECHO21: a tool for modelling global 21-cm signal from dark ages to reionization
• Efficient Modelling of Lyman-α opacity fluctuations during late reionization epoch
• Deep JWST spectroscopy of galaxies in a candidate ionized bubble at $z=8.7$: probing reionization at pMpc scales with Ly$\alpha$ emission
• A local, topology-independent parameterization of quasar IGM damping wings
• Measuring the IGM correlation length at 5<z<6.1: a fast change at the end of Reionization
• Euclid: Discovery of 31 new quasars at $6.6<z<7.8$
• Quantifying Lyman-$\alpha$ emissions from reionization fronts
• Impact of the cosmological expansion on spectral energy density of radiation in the intergalactic medium and once more about Olbers' paradox
• Cross-correlating the patchy screening and kinetic Sunyaev-Zel'dovich effects as a new probe of reionization
• Quantifying and mitigating the effect of snapshot interval in light-cone Epoch of Reionization 21-cm simulations
• Direct reconstruction of the Reionization history from 21cm 2D Power Spectra
• First constraints on the local ionization topology in front of two quasars at z ~ 7.5
• Power spectrum multipoles and clustering wedges during the Epoch of Reionization
• Nearest Neighbour-Based Statistics for 21cm-Galaxy Cross-Correlations in the Epoch of Reionization
• Reionization in HESTIA: Studying reionization in the LG through zoom simulations
• Modelling intergalactic low ionisation metal absorption line systems near the epoch of reionization
• Uncertainty-Aware Neural Networks for Fuzzy Dark Matter Model Selection from \texorpdfstring{$x_{\mathrm{HI}}$}{x_HI} Measurements
• An Estimate of the Impact of Reionization on Supermassive Black Hole Growth
• Studying dark gaps in Ly-$\alpha$ forest transmission with large reionization simulations
• Physics of star formation history and the luminosity function of galaxies therefrom