Constraining cosmology and ionization history with combined 21 cm power spectrum and global signal measurements
arXiv:1510.08815 · doi:10.1093/mnras/stw071
Abstract
Improvements in current instruments and the advent of next-generation instruments will soon push observational 21 cm cosmology into a new era, with high significance measurements of both the power spectrum and the mean ("global") signal of the 21 cm brightness temperature. In this paper we use the recently commenced Hydrogen Epoch of Reionization Array as a worked example to provide forecasts on astrophysical and cosmological parameter constraints. In doing so we improve upon previous forecasts in a number of ways. First, we provide updated forecasts using the latest best-fit cosmological parameters from the Planck satellite, exploring the impact of different Planck datasets on 21 cm experiments. We also show that despite the exquisite constraints that other probes have placed on cosmological parameters, the remaining uncertainties are still large enough to have a non-negligible impact on upcoming 21 cm data analyses. While this complicates high-precision constraints on reionization models, it provides an avenue for 21 cm reionization measurements to constrain cosmology. We additionally forecast HERA's ability to measure the ionization history using a combination of power spectrum measurements and semi-analytic simulations. Finally, we consider ways in which 21 cm global signal and power spectrum measurements can be combined, and propose a method by which power spectrum results can be used to train a compact parameterization of the global signal. This parameterization reduces the number of parameters needed to describe the global signal, increasing the likelihood of a high significance measurement.
16 pages, 8 figures. Revised to match accepted MNRAS version: expanded discussion of covariances between astrophysics and cosmology in Section 2.2, including two new figures; short discussion relating to KL modes added to Section 4; final results unchanged
References in corpus (98)
- Nine-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Parameter Results
- Cosmological parameters from CMB and other data: a Monte-Carlo approach
- LOFAR: The LOw-Frequency ARray
- 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
- Karhunen-Loeve eigenvalue problems in cosmology: how should we tackle large data sets?
- 21-cm cosmology
- 21-cm Tomography of the Intergalactic Medium at High Redshift
- 21cmFAST: A Fast, Semi-Numerical Simulation of the High-Redshift 21-cm Signal
- The Growth of HII Regions During Reionization
- Model-independent evidence in favor of an end to reionization by z~6
- The First Galaxies
- A model of diffuse Galactic Radio Emission from 10 MHz to 100 GHz
- Reionization and Cosmology with 21 cm Fluctuations
- Cosmological Parameter Estimation Using 21 cm Radiation from the Epoch of Reionization
- The Precision Array for Probing the Epoch of Reionization: 8 Station Results
- 21 Centimeter Fluctuations from Cosmic Gas at High Redshifts
- Bright Source Subtraction Requirements For Redshifted 21 cm Measurements
- What Next-Generation 21 cm Power Spectrum Measurements Can Teach Us About the Epoch of Reionization
- Reionization and the Cosmic Dawn with the Square Kilometre Array
- Measurement of 21 cm brightness fluctuations at z ~ 0.8 in cross-correlation
- A simulation calibrated limit on the HI power spectrum from the GMRT Epoch of Reionization experiment
- A Per-Baseline, Delay-Spectrum Technique for Accessing the 21cm Cosmic Reionization Signature
- Science with the Murchison Widefield Array
- Four Fundamental Foreground Power Spectrum Shapes for 21 cm Cosmology Observations
- Multifrequency analysis of 21 cm fluctuations from the Era of Reionization
- How accurately can 21 cm tomography constrain cosmology?
- The Epoch of Reionization Window: I. Mathematical Formalism
- New Limits on 21cm EoR From PAPER-32 Consistent with an X-Ray Heated IGM at z=7.7
- Determination of z~0.8 neutral hydrogen fluctuations using the 21 cm intensity mapping auto-correlation
- PAPER-64 Constraints on Reionization: The 21cm Power Spectrum at z=8.4
- Radio Signatures of HI at High Redshift: Mapping the End of the ``Dark Ages''
- 21CMMC: an MCMC analysis tool enabling astrophysical parameter studies of the cosmic 21 cm signal
- Imaging the Epoch of Reionization: limitations from foreground confusion and imaging algorithms
- Canadian Hydrogen Intensity Mapping Experiment (CHIME) Pathfinder
- Radio Foregrounds for the 21cm Tomography of the Neutral Intergalactic Medium at High Redshifts
- The Epoch of Reionization Window: II. Statistical Methods for Foreground Wedge Reduction
- A lower limit of dz > 0.06 for the duration of the reionization epoch
- The impact of point source subtraction residuals on 21 cm Epoch of Reionization estimation
- A Sensitivity and Array-Configuration Study for Measuring the Power Spectrum of 21cm Emission from Reionization
- Polarization of the Microwave Background in Reionized Models
- Overcoming real-world obstacles in 21 cm power spectrum estimation: A method demonstration and results from early Murchison Widefield Array data
- Constraining the unexplored period between reionization and the dark ages with observations of the global 21 cm signal
- Detecting the Rise and Fall of 21 cm Fluctuations with the Murchison Widefield Array
- Eigenmode Analysis of Galaxy Redshift Surveys I. Theory and Methods
- The Baryon Acoustic Oscillation Broadband and Broad-beam Array: Design Overview and Sensitivity Forecasts
- Twenty-one centimeter tomography with foregrounds
- A study of fundamental limitations to statistical detection of redshifted HI from the epoch of reionization
- Probing the Dark Ages at Z~20: The SCI-HI 21 cm All-Sky Spectrum Experiment
- Foregrounds in Wide-Field Redshifted 21 cm Power Spectra
- Probing the First Stars and Black Holes in the Early Universe with the Dark Ages Radio Explorer (DARE)
- Observing Neutral Hydrogen Above Redshift 6: The "Global" Perspective
- BIGHORNS - Broadband Instrument for Global HydrOgen ReioNisation Signal
- Redshifted 21 cm Emission From the Pre-Reionization Era I. Mean Signal and Linear Fluctuations
- Eliminating the optical depth nuisance from the CMB with 21 cm cosmology
- Empirical Covariance Modeling for 21 cm Power Spectrum Estimation: A Method Demonstration and New Limits from Early Murchison Widefield Array 128-Tile Data
- Spectral Index of the Diffuse Radio Background Measured From 100 to 200 MHz
- Signal-to-Noise Eigenmode Analysis of the Two-Year COBE Maps
- Toward Empirical Constraints on the Global Redshifted 21 cm Brightness Temperature During the Epoch of Reionization
- Light cone effect on the reionization 21-cm power spectrum
- Confirmation of Wide-Field Signatures in Redshifted 21 cm Power Spectra
- SARAS: a precision system for measurement of the Cosmic Radio Background and signatures from the Epoch of Reionization
- Foreground Model and Antenna Calibration Errors in the Measurement of the Sky-Averaged λ21 cm Signal at z~20
- Reionization and Beyond: detecting the peaks of the cosmological 21cm signal
- Multi-redshift limits on the 21cm power spectrum from PAPER
- PAPER-64 Constraints On Reionization II: The Temperature Of The z=8.4 Intergalactic Medium
- Chromatic effects in the 21 cm global signal from the cosmic dawn
- Unveiling the nature of dark matter with high redshift 21 cm line experiments
- Global 21cm signal experiments: A designer's guide
- The nature of dark matter from the global high redshift HI 21 cm signal
- Light cone effect on the reionization 21-cm signal II: Evolution, anisotropies and observational implications
- An MCMC approach to extracting the global 21-cm signal during the cosmic dawn from sky-averaged radio observations
- Interpreting the Global 21-cm Signal from High Redshifts. II. Parameter Estimation for Models of Galaxy Formation
- HI Signal from Reionization Epoch
- Constraining High Redshift X-ray Sources with Next Generation 21 cm Power Spectrum Measurements
- The trispectrum of 21-cm background anisotropies as a probe of primordial non-Gaussianity
- Cosmological-Constant Cold Dark Matter Models and the COBE Two-Year Sky maps
- Limits on Foreground Subtraction from Chromatic Beam Effects in Global Redshifted 21 cm Measurements
- Cosmological constraints from 21cm surveys after reionization
- Light-cone anisotropy in 21cm fluctuations during the epoch of reionization
- Measuring the Cosmological 21 cm Monopole with an Interferometer
- Reionization on Large Scales IV: Predictions for the 21 cm signal incorporating the light cone effect
- HI Epoch of Reionization Arrays
- Interpreting the Global 21-cm Signal from High Redshifts. I. Model Independent Constraints
- Erasing the variable: Empirical foreground discovery for global 21 cm spectrum experiments
- Light cone anisotropy in 21 cm signal from the epoch of reionization
- Parametrizations of the global 21-cm signal and parameter estimation from single-dipole experiments
- Background reionization history from omniscopes
- Constraints on the temperature of the intergalactic medium at z=8.4 with 21-cm observations
- Measuring the X-ray Background in the Reionization Era with First Generation 21 cm Experiments
- On the detection of global 21-cm signal from Reionization using interferometers
- Lunar occultation of the diffuse radio sky: LOFAR measurements between 35 and 80 MHz
- Studying cosmic reionization with observations of the global 21-cm signal
- Selection between foreground models for global 21-cm experiments
- Inflationary Potential from 21 cm Tomography and Planck
- Measuring the Redshift of Reionization with a Modest Array of Low-Frequency Dipoles
- A Resistive Wideband Space Beam Splitter
Cited by in corpus (48)
- Hydrogen Epoch of Reionization Array (HERA)
- Inferences on the Timeline of Reionization at z~8 From the KMOS Lens-Amplified Spectroscopic Survey
- Data Analysis for Precision 21 cm Cosmology
- First Results from HERA Phase I: Upper Limits on the Epoch of Reionization 21 cm Power Spectrum
- Neutrino Mass Ordering from Oscillations and Beyond: 2018 Status and Future Prospects
- Improved Constraints on the 21 cm EoR Power Spectrum and the X-Ray Heating of the IGM with HERA Phase I Observations
- The Global 21-cm Signal in the Context of the High-z Galaxy Luminosity Function
- A simplified, lossless re-analysis of PAPER-64
- Eliminating the optical depth nuisance from the CMB with 21 cm cosmology
- Bayesian constraints on the global 21-cm signal from the Cosmic Dawn
- Emulating Simulations of Cosmic Dawn for 21cm Power Spectrum Constraints on Cosmology, Reionization, and X-ray Heating
- Probing the Small-Scale Matter Power Spectrum with Large-Scale 21-cm Data
- Analysing the 21cm signal from the Epoch of Reionization with artificial neural networks
- Emulation of reionization simulations for Bayesian inference of astrophysics parameters using neural networks
- Mitigating Internal Instrument Coupling II: A Method Demonstration with the Hydrogen Epoch of Reionization Array
- Mitigating Internal Instrument Coupling for 21 cm Cosmology I: Temporal and Spectral Modeling in Simulations
- Characterizing Signal Loss in the 21 cm Reionization Power Spectrum: A Revised Study of PAPER-64
- The 21 cm signal and the interplay between dark matter annihilations and astrophysical processes
- Constraining the EoR model parameters with the 21cm bispectrum
- The Hydrogen Epoch of Reionization Array Dish II: Characterization of Spectral Structure with Electromagnetic Simulations and its science Implications
- 21SSD: a public database of simulated 21-cm signals from the epoch of reionization
- Removing Astrophysics in 21 cm maps with Neural Networks
- Hydrogen Epoch of Reionization Array (HERA) Phase II Deployment and Commissioning
- CosmoReionMC: A package for estimating cosmological and astrophysical parameters using CMB, Lyman-α absorption and global 21 cm data
- Signatures of Cosmic Reionization on the 21cm 2- and 3-point Correlation Function I: Quadratic Bias Modeling
- Canceling out intensity mapping foregrounds
- Studying Cosmic Dawn using redshifted HI 21-cm signal: A brief review
- The THESAN project: connecting ionized bubble sizes to their local environments during the Epoch of Reionization
- 21cmfish: Fisher-matrix framework for fast parameter forecasts from the cosmic 21-cm signal
- BEoRN: A fast and flexible framework to simulate the epoch of reionisation and cosmic dawn
- Small-scale primordial fluctuations in the 21cm Dark Ages signal
- Cosmic Variance of the 21-cm Global Signal
- Constraining the Epoch of Reionization With Highly Dispersed Fast Radio Bursts
- A General Bayesian Framework to Account for Foreground Map Errors in Global 21-cm Experiments
- Deep-Learning Study of the 21cm Differential Brightness Temperature During the Epoch of Reionization
- Quantifying Density-Ionization Correlations with the 21cm Power Spectrum
- Probing the primordial Universe with 21-cm line from cosmic dawn/epoch of reionization
- A galaxy-free phenomenological model for the 21-cm power spectrum during reionization
- Constraining the reionization history with CMB and spectroscopic observations
- 21 cm power spectrum in interacting cubic Galileon model
- Antisymmetric cross-correlation of line-intensity maps as a probe of reionization
- Unlocking Sensitivity for Visibility-based Estimators of the 21 cm Reionization Power Spectrum
- Lyman Alpha Emitters and the 21cm Power Spectrum as Probes of Density-Ionization Correlation in the Epoch of Reionization
- Topology of Reionisation times: concepts, measurements and comparisons to gaussian random field predictions
- Reionisation time fields reconstruction from 21 cm signal maps
- Simulation based inference of the ionization history from the 2D 21 cm power spectrum
- Recovering 21cm Monopole Signals Without Smoothness
- The Correlation Calibration of PAPER-64 data