Measurement of 21 cm brightness fluctuations at z ~ 0.8 in cross-correlation

Abstract

In this letter, 21 cm intensity maps acquired at the Green Bank Telescope are cross-correlated with large-scale structure traced by galaxies in the WiggleZ Dark Energy Survey. The data span the redshift range 0.6 < z < 1 over two fields totaling ~41 deg. sq. and 190 hours of radio integration time. The cross-correlation constrains Omega_HI b_HI r = [0.43 \pm 0.07 (stat.) \pm 0.04(sys.)] x 10^-3, where Omega_HI is the neutral hydrogen HI fraction, r is the galaxy-hydrogen correlation coefficient, and b_HI is the HI bias parameter. This is the most precise constraint on neutral hydrogen density fluctuations in a challenging redshift range. Our measurement improves the previous 21 cm cross-correlation at z ~ 0.8 both in its precision and in the range of scales probed.

5 pages, 2 figures. As published in ApJ

References in corpus (8)

• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• Baryon Acoustic Oscillation Intensity Mapping as a Test of Dark Energy
• On the (Non)Evolution of HI Disks over Cosmic Time
• How accurately can 21 cm tomography constrain cosmology?
• Possibility of Precise Measurement of the Cosmological Power Spectrum With a Dedicated 21cm Survey After Reionization
• A Method for 21cm Power Spectrum Estimation in the Presence of Foregrounds
• The HI content of star-forming galaxies at z = 0.24
• Measuring Baryon Acoustic Oscillations on 21 cm intensity fluctuations at moderate redshifts

Cited by in corpus (179)

• Late-time cosmology with 21cm intensity mapping experiments
• The Epoch of Reionization Window: I. Mathematical Formalism
• Canadian Hydrogen Intensity Mapping Experiment (CHIME) Pathfinder
• The Epoch of Reionization Window: II. Statistical Methods for Foreground Wedge Reduction
• HIRAX: A Probe of Dark Energy and Radio Transients
• Blind foreground subtraction for intensity mapping experiments
• The Evolution of the Baryons Associated with Galaxies Averaged over Cosmic Time and Space
• HI intensity mapping with MeerKAT: power spectrum detection in cross-correlation with WiggleZ galaxies
• HI constraints from the cross-correlation of eBOSS galaxies and Green Bank Telescope intensity maps
• Detection of Cosmological 21 cm Emission with the Canadian Hydrogen Intensity Mapping Experiment
• Forecasts on the Dark Energy and Primordial Non-Gaussianity Observations with the Tianlai Cylinder Array
• Neutral hydrogen (HI) gas content of galaxies at $z\approx 0.32$
• Cross-correlations as a cosmological carbon monoxide detector
• HI intensity mapping with MeerKAT: Calibration pipeline for multi-dish autocorrelation observations
• Modeling the neutral hydrogen distribution in the post-reionization Universe: intensity mapping
• SKAO HI Intensity Mapping: Blind Foreground Subtraction Challenge
• 21cm foregrounds and polarization leakage: a user's guide on cleaning and mitigation strategies
• Recovery of 21 cm intensity maps with sparse component separation
• deep21: a Deep Learning Method for 21cm Foreground Removal
• Prospects for Constraining Interacting Dark Energy Models with 21 cm Intensity Mapping Experiments
• The BINGO Project I: Baryon Acoustic Oscillations from Integrated Neutral Gas Observations
• Theoretical and observational constraints on the HI intensity power spectrum
• Impact of Foregrounds on HI Intensity Mapping Cross-Correlations with Optical Surveys
• Gaussian Process Foreground Subtraction and Power Spectrum Estimation for 21 cm Cosmology
• Hi intensity mapping with MeerKAT: Primary beam effects on foreground cleaning
• The Tianlai Dish Pathfinder Array: design, operation and performance of a prototype transit radio interferometer
• Spherical Harmonic Analyses of Intensity Mapping Power Spectra
• Intensity mapping of H-alpha, H-beta, [OII] and [OIII] lines at z<5
• Cosmological parameter forecasts for HI intensity mapping experiments using the angular power spectrum
• DAYENU: A Simple Filter of Smooth Foregrounds for Intensity Mapping Power Spectra
• The Tianlai Cylinder Pathfinder Array: System Functions and Basic Performance Analysis
• A path to precision cosmology: synergy between four promising late-universe cosmological probes
• An accurate low-redshift measurement of the cosmic neutral hydrogen density
• Illuminating the past 8 billion years of cold gas towards two gravitationally lensed quasars
• HI intensity mapping with MeerKAT: 1/f noise analysis
• Probing primordial non-Gaussianity via iSW measurements with SKA continuum surveys
• Phase-Space Spectral Line De-confusion in Intensity Mapping
• Erasing the variable: Empirical foreground discovery for global 21 cm spectrum experiments
• Gaussian Process Regression for foreground removal in HI intensity mapping experiments
• Neutrino Properties with Ground-Based Millimeter-Wavelength Line Intensity Mapping
• Cosmology Intertwined: A Review of the Particle Physics, Astrophysics, and Cosmology Associated with the Cosmological Tensions and Anomalies
• The First Large Absorption Survey in HI (FLASH): I. Science Goals and Survey Design
• The foreground transfer function for HI intensity mapping signal reconstruction: MeerKLASS and precision cosmology applications
• Gravitational waves $\times$ HI intensity mapping: cosmological and astrophysical applications
• The degeneracy between primordial non-Gaussianity and foregrounds in 21cm intensity mapping experiments
• Measuring the growth of structure with intensity mapping surveys
• Eliminating Primary Beam Effect in Foreground Subtraction of Neutral Hydrogen Intensity Mapping Survey with Deep Learning
• The Second Radio Synchrotron Background Workshop: Conference Summary and Report
• An Intensity Mapping Constraint on the CO-Galaxy Cross Power Spectrum at Redshift ~ 3
• Multipole expansion for HI intensity mapping experiments: simulations and modelling
• Deconvolving the Wedge: Maximum-Likelihood Power Spectra via Spherical-Wave Visibility Modeling
• Responses of Halo Occupation Distributions: a new ingredient in the halo model & the impact on galaxy bias
• Intensity mapping from the sky: synergizing the joint potential of [OIII] and [CII] surveys at reionization
• A direct detection of neutral hydrogen intensity mapping on Mpc scales at $z\approx 0.32$ and $z\approx 0.44$
• The BINGO Project VII: Cosmological Forecasts from 21cm Intensity Mapping
• HInet: Generating neutral hydrogen from dark matter with neural networks
• Detecting the power spectrum turnover with HI intensity mapping
• Prospects for measuring dark energy with 21 cm intensity mapping experiments: A joint survey strategy
• Coupling parsec and gigaparsec scales: primordial non-Gaussianity with multi-tracer intensity mapping
• First multi-redshift limits on post-Epoch of Reionization (post-EoR) 21 cm signal from z = 1.96 - 3.58 using uGMRT
• The Arecibo Ultra-Deep Survey
• The HI intensity mapping bispectrum including observational effects
• Power spectrum multipole expansion for HI intensity mapping experiments: unbiased parameter estimation
• Prospects for measuring dark energy with 21 cm intensity mapping experiments
• Data Processing Pipeline For Tianlai Experiment
• Probing large scale filaments with HI and ${}^3$HeII
• The neutral hydrogen distribution in large-scale haloes from 21-cm intensity maps
• Cosmic Near-infrared Background Tomography with SPHEREx Using Galaxy Cross-correlations
• Extracting HI Astrophysics from Interferometric Intensity Mapping
• The BINGO Project IV: Simulations for mission performance assessment and preliminary component separation steps
• A scale dependent bias on linear scales: the case for HI intensity mapping at z=1
• Prospects for 21cm-Galaxy Cross-Correlations with HERA and the Roman High-Latitude Survey
• Redshift space distortions of the {\rm HI} 21-cm intensity mapping signal due to the internal motions within galaxies
• Cleaning foregrounds from single-dish 21cm intensity maps with Kernel Principal Component Analysis
• Exploring the cosmic dawn and epoch of reionization with 21cm line
• Accurate Polarization Calibration at 800 MHz with the Green Bank Telescope
• The Tianlai dish array low-z surveys forecasts
• An HI intensity mapping survey with a Phased Array Feed
• Statistical recovery of the BAO scale from multipoles of the beam-convolved 21cm correlation function
• Probing early universe through redshifted 21-cm signal: Modelling and observational challenges
• Towards the first detection of strongly lensed HI emission
• A Semi-blind PCA-based Foreground Subtraction Method for 21 cm Intensity Mapping
• Cosmological Probes of Structure Growth and Tests of Gravity
• Testing gravity with gravitational waves $\times$ electromagnetic probes cross-correlations
• Forecasts and Statistical Insights for Line Intensity Mapping Cross-Correlations: A Case Study with 21cm x [CII]
• Detecting the HI Power Spectrum in the Post-Reionization Universe with SKA-Low
• Forecasting the Cross-Correlation of the CSST galaxy survey with the FAST HI Intensity Map
• Eliminating polarization leakage effect for neutral hydrogen intensity mapping with deep learning
• Towards 21-cm Intensity Mapping at $z=2.28$ with uGMRT using the Tapered Gridded Estimator I: Foreground Avoidance
• Extracting the Signal of Cosmic String Wakes from 21-cm Observations
• Multipole expansion for 21cm Intensity Mapping power spectrum: forecasted cosmological parameters estimation for the SKA Observatory
• Reflections and Standing Waves on the Tianlai Cylinder Array
• HI intensity mapping with the MIGHTEE survey: power spectrum estimates
• Extragalactic Science with the Experiment for Cryogenic Large-aperture Intensity Mapping
• Testing the equivalence principle on cosmological scales using the odd multipoles of galaxy cross-power spectrum and bispectrum
• HI intensity mapping correlation function from UNIT simulations: BAO and observationally induced anisotropy
• HI intensity mapping with MeerKAT: forecast for delay power spectrum measurement using interferometer mode
• Constraining low redshift [CII] Emission by Cross-Correlating FIRAS and BOSS Data
• The FAST Ultra-Deep Survey (FUDS): observational strategy, calibration and data reduction
• Recovering 21-cm signal from simulated FAST intensity maps
• CONCERTO: Extracting the power spectrum of the [C II ] emission line
• Fisher Matrix Based Predictions for Measuring the z = 3.35 Binned 21-cm Power Spectrum using the Ooty Wide Field Array (OWFA)
• Probing the Diffuse Lyman-alpha Emission on Cosmological Scales: Lyα Emission Intensity Mapping Using the Complete SDSS-IV eBOSS Survey
• Post-reionization HI 21-cm signal: A probe of negative cosmological constant
• Observational Evidence For Constant Gas Accretion Rate Since z = 5
• Simulations for 21 cm radiation lensing at EoR redshifts
• Interferometric HI intensity mapping: perturbation theory predictions and foreground removal effects
• A study of the HI gas fractions of galaxies at z ~ 1
• Antisymmetric Cross-correlation between H I and CO Line Intensity Maps as a New Probe of Cosmic Reionization
• Emission-line Stacking of 21cm Intensity Maps with MeerKLASS: Inference Pipeline and Application to the L-band Deep-field Data
• Towards $21$-cm intensity mapping at $z=2.28$ with uGMRT using the tapered gridded estimator -- IV. Wideband analysis
• 21-cm foreground removal using AI and frequency-difference technique
• Towards $21$-cm intensity mapping at $z=2.28$ with uGMRT using the tapered gridded estimator II: Cross-polarization power spectrum
• Cold neutral hydrogen gas in galaxies
• Cross-Correlation Forecast of CSST Spectroscopic Galaxy and MeerKAT Neutral Hydrogen Intensity Mapping Surveys
• An Integrated System at the Bleien Observatory for Mapping the Galaxy
• Detecting galaxy-21-cm cross-correlation during reionization
• COMAP Pathfinder -- Season 2 results I. Improved data selection and processing
• Unveiling the Universe with Emerging Cosmological Probes
• Towards Optimal Foreground Mitigation Strategies for Interferometric HI Intensity Mapping in the Low-Redshift Universe
• Full-Sky Lensing Reconstruction of 21 cm Intensity Maps
• Baryon acoustic oscillations from HI intensity mapping: the importance of cross-correlations in the monopole and quadrupole
• A Multi-messenger view of Cosmic Dawn: Conquering the Final Frontier
• A Differentiable, End-to-End Forward Model for 21 cm Cosmology: Estimating the Foreground, Instrument, and Signal Joint Posterior
• Foreground and sensitivity analysis for broad band (2D) 21cm--Ly-alpha and 21cm--H-alpha correlation experiments probing the Epoch of Reionization
• Bayesian Multi-line Intensity Mapping
• A statistical framework for recovering intensity mapping autocorrelations from crosscorrelations
• Fast Simulation of Cosmological Neutral Hydrogen based on the Halo Model
• Model-Independent Test for Gravity using Intensity Mapping and Galaxy Clustering
• Leveraging cross-correlations and linear covariance-based filtering for line-intensity map reconstructions at linear scales
• HI Intensity Mapping with the MIGHTEE Survey: First Results of the HI Power Spectrum
• Neutral hydrogen lensing simulations in the Hubble Frontier Fields
• Expanded Generalized Needlet Internal Linear Combination (eGNILC) Framework for the 21-cm Foreground Removal
• A search for HI absorption in distant star-forming galaxies with ASKAP-FLASH -- I. Selection and analysis of the radio sample
• 21 cm Intensity Mapping with the DSA-2000
• Holographic Beam Measurements of the Canadian Hydrogen Intensity Mapping Experiment (CHIME)
• Prospects for cosmological research with the FAST array: 21-cm intensity mapping survey observation strategies
• Baryon Acoustic Oscillations from Integrated Neutral Gas Observations: an instrument to observe the 21cm hydrogen line in the redshift range 0.13 $<$ z $<$ 0.45 -- status update
• Prospects of detecting HI using redshifted 21 cm radiation at z ~ 3
• FAST Drift Scan Survey for HI Intensity Mapping. II. Stacking-based Beam Construction of the 19-feed Array at $1.4$ GHz
• Mind the gap: the power of combining photometric surveys with intensity mapping
• Beam Maps of the Canadian Hydrogen Intensity Mapping Experiment (CHIME) Measured with a Drone
• A simulation experiment of a pipeline based on machine learning for neutral hydrogen intensity mapping surveys
• Testing General Relativity with Cosmological Large Scale Structure
• Constraining the halo-ISM connection through multi-transition carbon monoxide line-intensity mapping
• Can we constrain the evolution of HI bias using configuration entropy?
• A Digital Calibration Source for 21cm Cosmology Telescopes
• Atomic Hydrogen Shows its True Colours: Correlations between HI and Galaxy Colour in Simulations
• Foreground removal and angular power spectrum estimation of 21 cm signal using harmonic space ILC method
• Spin-based removal of instrumental systematics in 21cm intensity mapping surveys
• FAST drift scan survey for HI intensity mapping: simulation on hunting HI filament with pairwise stacking
• AlgoSCR: An algorithm for Solar Contamination Removal from radio interferometric data
• Extracting the Epoch of Reionization Signal with 3D U-Net Neural Networks Using Data-driven Systematic Effect Model
• Primary Beam Chromaticity in HIRAX: I. Characterization from Simulations and Power Spectrum Implications
• Large, fast and accurate HI intensity maps with latent overlap diffusion
• Direct correlation of line intensity mapping and CMB lensing from evolution along the lightcone
• A first quantification of the effects of absorption for HI Intensity Mapping experiments
• HI Intensity Mapping cross-correlation with thermal SZ fluctuations: forecasted cosmological parameters estimation for FAST and Planck
• A Beginner's Guide to Line Intensity Mapping Power Spectra
• MUSE-ALMA Haloes XIII. Molecular gas in $z\sim 0.5$ HI-selected galaxies
• Exploring HI Galaxy Redshift Survey Strategies for the FAST Core Array Interferometry
• Foreground removal in HI 21 cm intensity mapping under frequency-dependent beam distortions
• Constraining the [CII] luminosity function from the power spectrum of line-intensity maps at redshift 3.6
• A quadratic estimator view of the transfer function correction in intensity mapping surveys
• Needlets and foreground removal for SKAO hydrogen intensity maps
• Cavendish experiment with fast radio bursts on cosmological scales
• NeutralUniverseMachine: Predictions of HI gas in Different Theoretical Models
• Detecting galaxies in a large H{\sc i}~spectral cube
• Clustering redshifts with the 21cm-galaxy cross-bispectrum
• An Overview of CHIME, the Canadian Hydrogen Intensity Mapping Experiment
• Removing systematics-induced 21-cm foreground residuals by cross-correlating filtered data
• Semi-empirical constraints on the HI mass function of star-forming galaxies and ${\Omega }_{\mathrm{HI}}$ at $z\sim 0.37$ from interferometric surveys
• Deep learning with hybrid frequency differencing and principal component analysis for 21-cm foreground and beam mitigation
• The BINGO project X. Cosmological parameter constraints from HI Intensity Mapping lognormal simulations
• Nearest Neighbour-Based Statistics for 21cm-Galaxy Cross-Correlations in the Epoch of Reionization
• Seeing Wiggles without Seeing Wiggles: BAO Recovery in 21 cm Intensity Mapping with Deep Learning
• Probing the large-scale structure with 21cm-galaxy cross-bispectrum: Estimates from simulations and forecasts for upcoming cosmological surveys
• Foreground Subtraction with a Tensor-Based Oriented Singular Value Decomposition Method for HI Experiments
• Squared-field cross-correlation between kinetic Sunyaev-Zel'dovich effect and 21-cm intensity mapping