Studying 21cm power spectrum with one-point statistics
arXiv:1412.3332 · doi:10.1093/mnras/stv965
Abstract
The redshifted 21cm line signal from neutral hydrogens is a promising tool to probe the cosmic dawn and the epoch of reionization (EoR). Ongoing and future low-frequency radio experiments are expected to detect its fluctuations, especially through the power spectrum. In this paper, we give a physical interpretation of the time evolution of the power spectrum of the 21cm brightness temperature fluctuations, which can be decomposed into dark matter density, spin temperature and neutral fraction of hydrogen fluctuations. From the one-point statistics of the fluctuations, such as variance and skewness, we find that the peaks and dips in the time evolution are deeply related to X-ray heating of the intergalactic gas, which controls the spin temperature. We suggest the skewness of the brightness temperature distribution is a key observable to identify the onset of X-ray heating.
arXiv comment8 pages, 8 figures. Published in MNRAS
References in corpus (34)
- 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
- The Murchison Widefield Array: the Square Kilometre Array Precursor at low radio frequencies
- Observational constraints on Cosmic Reionization
- 21cmFAST: A Fast, Semi-Numerical Simulation of the High-Redshift 21-cm Signal
- Formation of Primordial Stars in a LCDM Universe
- Efficient Simulations of Early Structure Formation and Reionization
- What Next-Generation 21 cm Power Spectrum Measurements Can Teach Us About the Epoch of Reionization
- The Reionization of the Universe by the First Stars and Quasars
- How accurately can 21 cm tomography constrain cosmology?
- 21 cm fluctuations from inhomogeneous X-ray heating before reionization
- Foreground simulations for the LOFAR - Epoch of Reionization Experiment
- Signatures of X-rays in the early Universe
- The observable signature of late heating of the Universe during cosmic reionization
- Overcoming real-world obstacles in 21 cm power spectrum estimation: A method demonstration and results from early Murchison Widefield Array data
- Possibility of Precise Measurement of the Cosmological Power Spectrum With a Dedicated 21cm Survey After Reionization
- The signature of the first stars in atomic hydrogen at redshift 20
- 21 cm signal from cosmic dawn: Imprints of spin temperature fluctuations and peculiar velocities
- Cosmic Reionization and the 21-cm signal: Comparison between an analytical model and a simulation
- The bispectrum of redshifted 21-cm fluctuations from the dark ages
- Reionization by UV or X-ray sources
- Reionization and Beyond: detecting the peaks of the cosmological 21cm signal
- Multi-redshift limits on the 21cm power spectrum from PAPER
- LOFAR, a new low frequency radio telescope
- Complete history of the observable 21-cm signal from the first stars during the pre-reionization era
- Higher Order Contributions to the 21 cm Power Spectrum
- Detection and extraction of signals from the epoch of reionization using higher order one-point statistics
- The trispectrum of 21-cm background anisotropies as a probe of primordial non-Gaussianity
- Distinguishing models of reionization using future radio observations of 21-cm 1-point statistics
- The Difference PDF of 21-cm Fluctuations: A Powerful Statistical Tool for Probing Cosmic Reionization
- Measuring the X-ray Background in the Reionization Era with First Generation 21 cm Experiments
- Large-Scale Non-Gaussianities in the 21 cm Background Anisotropies From the Era of Reionization
- Probing the first galaxies with the SKA
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- Data Analysis for Precision 21 cm Cosmology
- Quantifying the non-Gaussianity in the EoR 21-cm signal through bispectrum
- Simulation-Based Inference of Reionization Parameters From 3D Tomographic 21 cm Lightcone Images
- 21cm-line bispectrum as method to probe Cosmic Dawn and Epoch of Reionization
- A fast estimator for the bispectrum and beyond - A practical method for measuring non-Gaussianity in 21-cm maps
- Constraining the EoR model parameters with the 21cm bispectrum
- Insights from probability distribution functions of intensity maps
- Position-dependent power spectra of the 21-cm signal from the epoch of reionization
- Sensitivity for 21cm Bispectrum from Epoch of Reionization
- The impact of spin temperature fluctuations on the 21-cm moments
- Simulating the Impact of X-ray Heating during the Cosmic Dawn
- Studying topological structure in the epoch of reionization with 3D-Minkowski functionals of 21cm line fluctuations
- Machine learning astrophysics from 21 cm lightcones: impact of network architectures and signal contamination
- Redshifted 21-cm Bispectrum I: Impact of the Redshift Space Distortions on the Signal from the Epoch of Reionization
- Exploring the cosmic 21-cm signal from the Epoch of Reionisation using the Wavelet Scattering Transform
- Redshifted 21-cm bispectrum II: Impact of the spin temperature fluctuations and redshift space distortions on the signal from the Cosmic Dawn
- Improving constraints on the reionization parameters using 21-cm bispectrum
- Detectability of 21cm-signal during the Epoch of Reionization with 21cm-Lyman- emitter cross-correlation. I
- Deconvolving the Wedge: Maximum-Likelihood Power Spectra via Spherical-Wave Visibility Modeling
- The Epoch of Reionization 21-cm Bispectrum: The impact of light-cone effects and detectability
- Constraining the Contribution of Galaxies and Active Galactic Nuclei to Cosmic Reionization
- Expected constraints on models of the epoch of reionization with the variance and skewness in redshifted 21cm-line fluctuations
- A Bayesian analysis of redshifted 21-cm HI signal and foregrounds: Simulations for LOFAR
- Exploring the cosmic dawn and epoch of reionization with 21cm line
- Detecting the non-Gaussianity of the 21-cm signal during reionisation with the Wavelet Scattering Transform
- Sensitivity of the Hydrogen Epoch of Reionization Array and its Build-out Stages to One-point Statistics from Redshifted 21 cm Observations
- Detectability of 21cm-signal during the Epoch of Reionization with 21cm-Lyman-α emitter cross-correlation. II. Foreground contamination
- Redshifted 21-cm bispectrum: Impact of the source models on the signal and the IGM physics from the Cosmic Dawn
- Extreme Spheres: Counts-in-cells for 21cm intensity mapping
- Quantiles as Robust Probes of Non-Gaussianity in 21-cm Images
- Characteristic Functions for Cosmological Cross-Correlations
- Impact of the Epoch of Reionization sources on the 21-cm bispectrum
- Studying the Multi-frequency Angular Power Spectrum of the Cosmic Dawn 21-cm Signal
- Impact of astrophysical scatter on the Epoch of Reionization [H I] bispectrum
- Studying neutral hydrogen structures during the epoch of reionization using fractal dimensions
- The variance of dispersion measure of high-redshift transient objects as a probe of ionized bubble size during reionization
- Reionization Parameter Inference from 3D Minkowski Functionals of the 21 cm Signals
- Exploring One-point Statistics in HERA Phase I Data: Effects of Foregrounds and Systematics on Measuring One-Point Statistics
- Power spectrum multipoles and clustering wedges during the Epoch of Reionization