Observing the Reionization Epoch Through 21 Centimeter Radiation

Abstract

We study the observability of the reionization epoch through the 21 cm hyperfine transition of neutral hydrogen. We use a high-resolution cosmological simulation (including hydrodynamics) together with a fast radiative transfer algorithm to compute the evolution of 21 cm emission from the intergalactic medium (IGM) in several different models of reionization. We show that the mean brightness temperature of the IGM drops from dT_b~25 mK to dT_b~0.01 mK during overlap (over a frequency interval of ~25 MHz), while the root mean square brightness temperature fluctuations on small scales drop abruptly from ~10 mK before overlap to ~0.1 mK at the end of overlap. We show that 21 cm observations can efficiently discriminate models with a single early reionization epoch from models with two distinct reionization episodes.

10 pages, 7 figures, submitted to MNRAS

References in corpus (10)

• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Determination of Cosmological Parameters
• Wilkinson Microwave Anisotropy Probe (WMAP) First Year Observations: TE Polarization
• Simulations of Early Structure Formation: Primordial Gas Clouds
• The Reionization History at High Redshifts I: Physical Models and New Constraints from CMB Polarization
• Cosmic Reionisation by Stellar Sources: Population II Stars
• Was the Universe Reionized by Massive Population-III Stars?
• Implications of WMAP Observations On the Population III Star Formation Processes
• Simulating IGM Reionization
• Early Structure Formation and Reionization in a Warm Dark Matter Cosmology
• The Reionization History at High Redshifts II: Estimating the Optical Depth to Thomson Scattering from CMB Polarization

Cited by in corpus (83)

• Cosmology at Low Frequencies: The 21 cm Transition and the High-Redshift Universe
• Observational constraints on Cosmic Reionization
• The Growth of HII Regions During Reionization
• 21 Centimeter Fluctuations from Cosmic Gas at High Redshifts
• The First Cosmic Structures and their Effects
• The Direct Detection of Lyman-Continuum Emission from Star-forming Galaxies at z~3
• Cosmology with Weak Lensing Surveys
• Unusually Large Fluctuations in the Statistics of Galaxy Formation at High Redshift
• Early reionization by miniquasars
• Studying Reionization with Ly-alpha Emitters
• Simulating Cosmic Reionization at Large Scales II: the 21-cm Emission Features and Statistical Signals
• Statistical Probes of Reionization With 21 cm Tomography
• A Method for 21cm Power Spectrum Estimation in the Presence of Foregrounds
• Cosmic Reionisation by Stellar Sources: Population III Stars
• Twenty-one centimeter tomography with foregrounds
• On using visibility correlations to probe the HI distribution from the dark ages to the present epoch I: Formalism and the expected signal
• Fast Large Volume Simulations of the 21 cm Signal from the Reionization and pre-Reionization Epochs
• The Kinetic Sunyaev-Zel'dovich Effect from Reionization
• The Era of Massive Population III Stars: Cosmological Implications and Self-Termination
• Neutral hydrogen surveys for high redshift galaxy clusters and proto-clusters
• Science with a lunar low-frequency array: from the dark ages of the Universe to nearby exoplanets
• Descending from on high: Lyman series cascades and spin-kinetic temperature coupling in the 21 cm line
• Redshifted 21 cm Emission From the Pre-Reionization Era I. Mean Signal and Linear Fluctuations
• Precision Calibration of Radio Interferometers Using Redundant Baselines
• Foregrounds for observations of the cosmological 21 cm line: II. Westerbork observations of the fields around 3C196 and the North Celestial Pole
• The Rise of the First Stars: Supersonic Streaming, Radiative Feedback, and 21-cm Cosmology
• The multi-frequency angular power spectrum of the epoch of reionization 21 cm signal
• The 21 centimeter emission from the reionization epoch: extended and point source foregrounds
• Quasar Proximity Zones and Patchy Reionization
• The influence of non-uniform reionization on the CMB
• Cosmic Reionization and the 21-cm signal: Comparison between an analytical model and a simulation
• How well can we measure and understand foregrounds with 21 cm experiments?
• The simulated 21 cm signal during the epoch of reionization : full modeling of the Ly-alpha pumping
• The Number of Supernovae from Primordial Stars in the Universe
• The effect of minihaloes on cosmic reionization
• Will point sources spoil 21 cm tomography?
• Lyman-alpha radiative transfer during the Epoch of Reionization: contribution to 21-cm signal fluctuations
• The Kinetic Sunyaev-Zel'dovich Effect from Radiative Transfer Simulations of Patchy Reionization
• A Fast Method for Power Spectrum and Foreground Analysis for 21 cm Cosmology
• Lensing Reconstruction using redshifted 21cm Fluctuations
• The 21cm Signature of the First Stars
• Higher Order Contributions to the 21 cm Power Spectrum
• The Cosmic Near Infrared Background: Remnant Light from Early Stars
• Massive galaxies & EROs at z=1-3 in cosmological hydrodynamic simulations: near-IR properties
• UV pumping of hyperfine transitions in the light elements, with application to 21-cm hydrogen and 92-cm deuterium lines from the early universe
• Gravitational Lensing of Epoch-of-reionization Gas
• Massive galaxies in cosmological simulations: UV-selected sample at redshift z=2
• The Cosmic Reionization History as Revealed by the CMB Doppler--21-cm Correlation
• Radio Afterglows of Gamma-Ray Bursts and Hypernovae at High Redshift, and their Potential for 21-cm Absorption Studies
• The Alcock-Paczynski test in redshifted twenty one centimeter maps
• Redshifted 21cm Signatures Around the Highest Redshift Quasars
• Lyman Break Galaxies at z = 4 - 6 in cosmological SPH Simulations
• The 21 Centimeter Background from the Cosmic Dark Ages: Minihalos and the Intergalactic Medium before Reionization
• Reionization History from Coupled CMB/21cm Line Data
• 21 cm Tomography of the High-Redshift Universe with the Square Kilometer Array
• Redshift space 21 cm power spectra from reionization
• Cosmological and Astrophysical Parameter Measurements with 21-cm Anisotropies During the Era of Reionization
• Lyalpha versus X-ray heating in the high-z IGM
• Eavesdropping on Radio Broadcasts from Galactic Civilizations with Upcoming Observatories for Redshifted 21cm Radiation
• Was the Universe Reionized at Redshift 10?
• Probing the bispectrum at high redshifts using 21 cm HI observations
• The Kinetic Sunyaev-Zel'dovich Effect from Patchy Reionization: the View from the Simulations
• Studying Cosmic Dawn using redshifted HI 21-cm signal: A brief review
• Quasars as probes of cosmological reionization
• Extracting the 21-cm Power Spectrum and the reionization parameters from mock datasets using Artificial Neural Networks
• Simulating the 21cm forest detectable with LOFAR and SKA in the spectra of high-z GRBs
• The cosmological free-free signal from galaxy groups and clusters
• Cross-correlation studies as a probe of reionization physics
• The contribution of the IGM and minihalos to the 21 cm signal of reionization
• 21cm Global Signal Extraction: Extracting the 21cm Global Signal using Artificial Neural Networks
• Signatures of the Baryon Acoustic Oscillations on 21cm Emission Background
• HI 21cm probes of reionization, and beyond
• The Application of Continuous Wavelet Transform Based Foreground Subtraction Method in 21 cm Sky Surveys
• Radio views of cosmic reionization
• Clustering at 74 MHz
• Statistical features of 21-cm emission from the epoch between reionization and Gunn-Peterson transparency
• Direction-dependent effects on global 21-cm detection
• Low-Frequency Radio Recombination Lines Away From the Inner Galactic Plane
• Measuring the global 21-cm signal with the MWA-II: improved characterisation of lunar-reflected radio frequency interference
• Probing Cosmological Reionization through Radio-interferometric Observations of Neutral Hydrogen
• A Multi-Site Study of Radio Environment for Cosmology Experiments
• It's Always Darkest Before the Cosmic Dawn: Early Results from Novel Tools and Telescopes for 21 cm Cosmology
• Imaging the Southern Sky at 159MHz using Spherical Harmonics with the Engineering Development Array 2