Mapping neutral islands during end stages of reionization with photometric intergalactic medium tomography

Abstract

During the epoch of reionization (EoR), the first generation of luminous sources in our Universe emitted ionizing photons that almost completely ionized the gas in the intergalactic medium (IGM). The growth of ionized bubbles and the persistence of neutral islands within the IGM hold vital clues to understanding the morphology and timeline of cosmic reionization. We explore the potential of photometric IGM tomography using deep narrow-band (NB) imaging to observe the Lyman-$\alpha$ forest transmission in background galaxies with the Subaru/Hyper-Suprime Cam (HSC). Based on our simulations, we find that the currently available NB filter is suitable for mapping the IGM at $z\simeq 5.7$, corresponding to the late stages of reionization. Our findings indicate that over $\sim$500 background galaxies are needed to accurately reconstruct the IGM at scales greater than 200 Mpc, achieving more than a 40 per cent correlation with the true distribution. This technique can help detect final remaining neutral islands that span more than 20 Mpc lengths. Using the superpixel method built to identify physical patterns in noisy image data, we find that the neutral island size distribution can be recovered with an accuracy of $\sim$0.3 dex. Furthermore, we demonstrate that these reconstructed maps are correlated with the galaxy distribution and anti-correlated with the cosmological 21-cm signal from neutral hydrogen in the IGM. Lastly, we find that these reconstructed maps are anti-correlated with the patchy optical depth to the cosmic microwave background. As such, multiple measurements can be employed for confirmed detection of neutral islands during the end stages.

arXiv comment18 pages, 13 figures. Accepted for publication in MNRAS

References in corpus (108)

• SciPy 1.0--Fundamental Algorithms for Scientific Computing in Python
• Astropy: A Community Python Package for Astronomy
• The NumPy array: a structure for efficient numerical computation
• scikit-image: Image processing in Python
• U-Net and its variants for medical image segmentation: theory and applications
• Cosmology at Low Frequencies: The 21 cm Transition and the High-Redshift Universe
• In the Beginning: The First Sources of Light and the Reionization of the Universe
• The Murchison Widefield Array: the Square Kilometre Array Precursor at low radio frequencies
• Planck 2018 results. V. CMB power spectra and likelihoods
• 21-cm cosmology
• UltraVISTA: a new ultra-deep near-infrared survey in COSMOS
• Statistics of 207 Lya Emitters at a Redshift Near 7: Constraints on Reionization and Galaxy Formation Models
• Hydrogen Epoch of Reionization Array (HERA)
• Euclid. I. Overview of the Euclid mission
• Reionization of the Inhomogeneous Universe
• The Lyman Alpha Forest in the Spectra of QSOs
• Efficient Simulations of Early Structure Formation and Reionization
• Evidence of patchy hydrogen reionization from an extreme Ly$\alpha$ trough below redshift six
• New Determinations of the UV Luminosity Functions from z~9 to z~2 show a remarkable consistency with halo growth and a constant star formation efficiency
• Simulating Cosmic Reionization at Large Scales I: the Geometry of Reionization
• Simulations and Analytic Calculations of Bubble Growth During Hydrogen Reionization
• 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
• 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
• Concerns about Modelling of the EDGES Data
• Accurate Estimators of Correlation Functions in Fourier Space
• C^2-Ray: A new method for photon-conserving transport of ionizing radiation
• Deep multi-redshift limits on Epoch of Reionisation 21cm Power Spectra from Four Seasons of Murchison Widefield Array Observations
• Systematic Identification of LAEs for Visible Exploration and Reionization Research Using Subaru HSC (SILVERRUSH). I. Program Strategy and Clustering Properties of ~2,000 Lya Emitters at z=6-7 over the 0.3-0.5 Gpc${}^2$ Survey Area
• Observations of the Lyman-$\alpha$ Universe
• Can the intergalactic medium cause a rapid drop in Lyman alpha emission at z>6?
• Ingredients for 21cm intensity mapping
• The Giant Gemini GMOS survey of z>4.4 quasars - I. Measuring the mean free path across cosmic time
• Improved Constraints on the 21 cm EoR Power Spectrum and the X-Ray Heating of the IGM with HERA Phase I Observations
• Long troughs in the Lyman-$\alpha$ forest below redshift 6 due to islands of neutral hydrogen
• 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
• Minihalo photoevaporation during cosmic reionization: evaporation times and photon consumption rates
• The Detectability of Lyman Alpha Emission from Galaxies during the Epoch of Reionization
• EIGER I. a large sample of [OIII]-emitting galaxies at $5.3<z<6.9$ and direct evidence for local reionization by galaxies
• Reionization and high-redshift galaxies: the view from quasar absorption lines
• Large fluctuations in the hydrogen-ionizing background and mean free path following the epoch of reionization
• Characteristic Scales During Reionization
• Measurements of the z ~ 6 Intergalactic Medium Optical Depth and Transmission Spikes Using a New z > 6.3 Quasar Sample
• Probing the thermal state of the intergalactic medium at $z>5$ with the transmission spikes in high-resolution Ly$\alpha$ forest spectra
• 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
• Lyman-alpha emitters gone missing: evidence for late reionization?
• Observing the tail of reionization: neutral islands in the $z=5.5$ Lyman-$\alpha$ Forest
• Reconstructing Patchy Reionization from the Cosmic Microwave Background
• Can 21-cm observations discriminate between high-mass and low-mass galaxies as reionization sources?
• Topology and Sizes of HII Regions during Cosmic Reionization
• The Reionization History at High Redshifts II: Estimating the Optical Depth to Thomson Scattering from CMB Polarization
• A SPectroscopic survey of biased halos In the Reionization Era (ASPIRE): JWST Reveals a Filamentary Structure around a z=6.61 Quasar
• Long Dark Gaps in the Ly$\beta$ Forest at $z<6$: Evidence of Ultra Late Reionization from XQR-30 Spectra
• The Volume Fraction of Ionized Intergalactic Gas at Redshift z=6.5
• Evidence for Large-Scale Fluctuations in the Metagalactic Ionizing Background Near Redshift Six
• Measuring the properties of reionised bubbles with resolved Lyman alpha spectra
• XQR-30: the ultimate XSHOOTER quasar sample at the reionization epoch
• Modeling the neutral hydrogen distribution in the post-reionization Universe: intensity mapping
• Bubble size statistics during reionization from 21-cm tomography
• The Role of Galaxies and AGN in Reionising the IGM - I: Keck Spectroscopy of 5 < z < 7 Galaxies in the QSO Field J1148+5251
• Lyman Alpha Emitters and Lyman Break Galaxies: dichotomous twins?
• Optimal identification of HII regions during reionization in 21-cm observations
• Three Lyman-alpha emitting galaxies within a quasar proximity zone at z=5.8
• Strong Ly$\alpha$ Emission in an Overdense Region at $z=6.8$: A Very Large ($R\sim 3$ physical Mpc) Ionized Bubble in COSMOS?
• Studying the Lyman-$\alpha$ optical depth fluctuations at $z\sim 5.5$ using fast semi-numerical methods
• Modelling the observed luminosity function and clustering evolution of Lyman-$\alpha$ emitters: growing evidence for late reionization
• B-mode CMB Polarization from Patchy Screening during Reionization
• Gaussian Process Foreground Subtraction and Power Spectrum Estimation for 21 cm Cosmology
• Cosmic Microwave Background Constraints in Light of Priors Over Reionization Histories
• Recovering the HII region size statistics from 21-cm tomography
• The role of galaxies and AGN in reionising the IGM -- III : IGM-galaxy cross-correlations at z~6 from 8 quasar fields with DEIMOS and MUSE
• Recovering the Wedge Modes Lost to 21-cm Foregrounds
• Measuring the topology of reionization with Betti numbers
• Starbursts in low-mass haloes at Cosmic Dawn. I. The critical halo mass for star formation
• Neutral island statistics during reionization from 21-cm tomography
• 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
• Persistent topology of the reionisation bubble network. I: Formalism & Phenomenology
• 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
• Patchy Screening of the Cosmic Microwave Background by Inhomogeneous Reionization
• Probing patchy reionization through tau-21cm correlation statistics
• Inferring the properties of the sources of reionization using the morphological spectra of the ionized regions
• Mapping quasar light echoes in 3D with Lyα forest tomography
• The Prime Focus Spectrograph Galaxy Evolution Survey
• Constraining the Tail-End of Reionization Using Lyman-$\alpha$ Transmission Spikes
• Deep learning approach for identification of HII regions during reionization in 21-cm observations -- II. foreground contamination
• Reconstructing the Thomson Optical Depth due to Patchy Reionization with 21-cm Fluctuation Maps
• Statistical analysis of the causes of excess variance in the 21 cm signal power spectra obtained with the Low-Frequency Array
• IslandFAST: A Semi-numerical Tool for Simulating the Late Epoch of Reionization
• The physical origin for spatially large scatter of IGM opacity at the end of reionization: the IGM Ly$\alpha$ opacity-galaxy density relation
• Observing the Reionization : Effect of Calibration and Position Errors on Realistic Observation Conditions
• Astraeus VIII: A new framework for Lyman-$\alpha$ emitters applied to different reionisation scenarios
• Imaging of diffuse HI absorption structure in the SSA22 proto-cluster region at z = 3.1
• Bubble mapping with the Square Kilometer Array -- I. Detecting galaxies with Euclid, JWST, WFIRST and ELT within ionized bubbles in the intergalactic medium at z>6
• Impact of instrument and data characteristics in the interferometric reconstruction of the 21 cm power spectrum
• pyC${}^2$Ray: A flexible and GPU-accelerated Radiative Transfer Framework for Simulating the Cosmic Epoch of Reionization
• Suppressing variance in 21-cm signal simulations during reionization
• Constraining primordial non-Gaussianity with CMB-21cm cross-correlations?
• Searching for patchy reionization from cosmic microwave background with hybrid quadratic estimators
• The HI Bias during the Epoch of Reionization
• Mapping reionization bubbles in the JWST era I: empirical edge detection with Lyman alpha emission from galaxies
• Mapping reionization bubbles in the JWST era II: inferring the position and characteristic size of individual bubbles
• Photometric IGM Tomography: Efficiently Mapping Quasar Light Echoes with Deep Narrow Band Imaging
• Photometric IGM tomography with Subaru/HSC: the large-scale structure of Ly$\alpha$ emitters and IGM transmission in the COSMOS field at $z\sim 5$
• Reconstructing patchy helium reionization using the cosmic microwave background and large-scale structure
• JWST ASPIRE: How Did Galaxies Complete Reionization? Evidence for Excess IGM Transmission around $[\mathrm{O}\mathrm{III}]$ Emitters during Reionization

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