Interpreting the HI 21-cm cosmology maps through Largest Cluster Statistics -- I: Impact of the synthetic SKA1-Low observations

Abstract

We analyse the evolution of the largest ionized region using the topological and morphological evolution of the redshifted 21-cm signal coming from the neutral hydrogen distribution during the different stages of reionization. For this analysis, we use the "Largest Cluster Statistics" - LCS. We mainly study the impact of the array synthesized beam on the LCS analysis of the 21-cm signal considering the upcoming low-frequency Square Kilometer Array (SKA1-Low) observations using a realistic simulation for such observation based on the 21cmE2E-pipeline using OSKAR. We find that bias in LCS estimation is introduced in synthetic observations due to the array beam. This in turn shifts the apparent percolation transition point towards the later stages of reionization. The biased estimates of LCS, occurring due to the effect of the lower resolution (lack of longer baselines) and the telescope synthesized beam will lead to a biased interpretation of the reionization history. This is important to note while interpreting any future 21-cm signal images from upcoming or future telescopes like the SKA, HERA, etc. We conclude that one may need denser $uv$-coverage at longer baselines for a better deconvolution of the array synthesized beam from the 21-cm images and a relatively unbiased estimate of LCS from such images.

arXiv comment37 pages, 14 figures, Published in Journal of Cosmology and Astroparticle Physics (JCAP)

References in corpus (96)

• Seven-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• Cosmology at Low Frequencies: The 21 cm Transition and the High-Redshift Universe
• 21-cm cosmology
• 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
• Statistics of 207 Lya Emitters at a Redshift Near 7: Constraints on Reionization and Galaxy Formation Models
• Hydrogen Epoch of Reionization Array (HERA)
• The Growth of HII Regions During Reionization
• Multi-Scale CLEAN deconvolution of radio synthesis images
• Cosmological Parameter Estimation Using 21 cm Radiation from the Epoch of Reionization
• Evidence of patchy hydrogen reionization from an extreme Ly$\alpha$ trough below redshift six
• Simulating Cosmic Reionization at Large Scales I: the Geometry of Reionization
• What Next-Generation 21 cm Power Spectrum Measurements Can Teach Us About the Epoch of Reionization
• Simulations and Analytic Calculations of Bubble Growth During Hydrogen Reionization
• A simulation calibrated limit on the HI power spectrum from the GMRT Epoch of Reionization experiment
• Improved upper limits on the 21-cm signal power spectrum of neutral hydrogen at $\mathbf{z}\approx 9.1$ from LOFAR
• Upper limits on the 21-cm Epoch of Reionization power spectrum from one night with LOFAR
• Foreground simulations for the LOFAR - Epoch of Reionization Experiment
• A Method for Separating the Physics from the Astrophysics of High-Redshift 21cm Fluctuations
• Introducing the THESAN project: radiation-magnetohydrodynamic simulations of the epoch of reionization
• Cosmological Radiative Transfer Codes Comparison Project I: The Static Density Field Tests
• The CMBR fluctuations from HI perturbations prior to reionization
• Radio Foregrounds for the 21cm Tomography of the Neutral Intergalactic Medium at High Redshifts
• Simulating Cosmic Reionization at Large Scales II: the 21-cm Emission Features and Statistical Signals
• First Results from HERA Phase I: Upper Limits on the Epoch of Reionization 21 cm Power Spectrum
• Simulating cosmic reionization: How large a volume is large enough?
• Inside-out or Outside-in: The topology of reionization in the photon-starved regime suggested by Lyman-alpha forest data
• Cosmic Reionization On Computers I. Design and Calibration of Simulations
• Detecting the Rise and Fall of 21 cm Fluctuations with the Murchison Widefield Array
• The Cosmic Dawn and Epoch of Reionization with the Square Kilometre Array
• First Results from the Lyman Alpha Galaxies in the Epoch of Reionization (LAGER) Survey: Cosmological Reionization at z ~ 7
• Improving the Epoch of Reionization Power Spectrum Results from Murchison Widefield Array Season 1 Observations
• A simplified, lossless re-analysis of PAPER-64
• Power Spectrum Sensitivity and the Design of Epoch of Reionization Observatories
• Redshift Space Distortion of the 21cm Background from the Epoch of Reionization I: Methodology Re-examined
• Foregrounds for redshifted 21 cm studies of reionization: GMRT 153 MHz observations
• Quantifying the non-Gaussianity in the EoR 21-cm signal through bispectrum
• 21 cm signal from cosmic dawn: Imprints of spin temperature fluctuations and peculiar velocities
• The multi-frequency angular power spectrum of the epoch of reionization 21 cm signal
• Characterizing Foreground for redshifted 21-cm radiation: 150 MHz GMRT observations
• Fast Large-Scale Reionization Simulations
• Topology and Sizes of HII Regions during Cosmic Reionization
• On the use of semi-numerical simulations in predicting the 21-cm signal from the epoch of reionization
• Towards optimal parallel PM N-body codes: PMFAST
• Updating reionization scenarios after recent data
• Did Globular Clusters Reionize the Universe?
• A New Constraint on Reionization from Evolution of the Ly$\alpha$ Luminosity Function at $z\sim 6-7$ Probed by a Deep Census of $z=7.0$ Ly$\alpha$ Emitter Candidates to 0.3 $L^{\ast }$
• Measuring the Geometry and Topology of Large Scale Structure using SURFGEN: Methodology and Preliminary Results
• Cosmological Simulations for Combined-Probe Analyses: Covariance and Neighbour-Exclusion Bias
• Probing non-Gaussian features in the HI distribution at the epoch of reionization
• Optimal identification of HII regions during reionization in 21-cm observations
• The 21cm bispectrum as a probe of non-Gaussianities due to X-ray heating
• Imaging the redshifted 21-cm pattern around the first sources during the cosmic dawn using the SKA
• Statistics of the epoch of reionization (EoR) 21-cm signal -- II. The evolution of the power spectrum error-covariance
• The 21cm bispectrum during reionization: a tracer of the ionization topology
• The effect of non-Gaussianity on error predictions for the Epoch of Reionization (EoR) 21-cm power spectrum
• Reionization Through the Lens of Percolation Theory
• The trispectrum of 21-cm background anisotropies as a probe of primordial non-Gaussianity
• Towards simulating and quantifying the light-cone EoR 21-cm signal
• Observations of the Lyman series forest towards the redshift 7.1 quasar ULAS J1120+0641
• Position-dependent power spectra of the 21-cm signal from the epoch of reionization
• Recovering the HII region size statistics from 21-cm tomography
• Measuring the topology of reionization with Betti numbers
• Studying topological structure in the epoch of reionization with 3D-Minkowski functionals of 21cm line fluctuations
• The effect of peculiar velocities on the epoch of reionization (EoR) 21-cm signal
• Statistics of the epoch of reionization 21-cm signal - I. Power spectrum error-covariance
• Universality of the Network and Bubble Topology in Cosmological Gravitational Simulations
• 21 cm Tomography of the High-Redshift Universe with the Square Kilometer Array
• Redshifted 21-cm Bispectrum I: Impact of the Redshift Space Distortions on the Signal from the Epoch of Reionization
• Detailed study of ELAIS N1 field with the uGMRT -- II. Source Properties and Spectral Variation Of Foreground Power Spectrum from 300-500 MHz Observations
• Probing Large Scale Structure using Percolation and Genus Curves
• Redshifted 21-cm bispectrum II: Impact of the spin temperature fluctuations and redshift space distortions on the signal from the Cosmic Dawn
• The Shape and Size distribution of HII Regions near the percolation transition
• Improving constraints on the reionization parameters using 21-cm bispectrum
• Prospects of constraining reionization model parameters using Minkowski tensors and Betti numbers
• Studying the morphology of HI isodensity surfaces during reionization using Shapefinders and percolation analysis
• Effects of the sources of reionization on 21-cm redshift-space distortions
• Morphology of 21cm brightness temperature during the Epoch of Reioinization using Contour Minkowski Tensor
• Persistent topology of the reionisation bubble network. I: Formalism & Phenomenology
• Predictions for measuring the 21-cm multi-frequency angular power spectrum using SKA-Low
• A method to determine the evolution history of the mean neutral Hydrogen fraction
• The Kinetic Sunyaev-Zel'dovich Effect from Patchy Reionization: the View from the Simulations
• The Epoch of Reionization 21-cm Bispectrum: The impact of light-cone effects and detectability
• Characterizing EoR foregrounds: A study of the Lockman Hole Region at 325 MHz
• A study of simulated histories of reionization with merger trees of HII regions
• The HI-halo mass relation at redshift $z\sim 1$ from the Minkowski functionals of 21 cm intensity maps
• Observing the Reionization : Effect of Calibration and Position Errors on Realistic Observation Conditions
• Impact of dark matter models on the EoR 21-cm signal bispectrum
• Spectroscopy of the spatially-extended Lya emission around a QSO at z=6.4
• Adaptive Weighting in Radio Interferometric Imaging
• Probing early universe through redshifted 21-cm signal: Modelling and observational challenges
• Investigating the physical properties of galaxies in the Epoch of Reionization with MIRI/JWST spectroscopy
• Distinguishing reionization models using the largest cluster statistics of the 21-cm maps
• The shape distribution of superclusters in SDSS DR 12
• Using the sample variance of 21cm maps as a tracer of the ionisation topology

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