The cross-correlation of the CMB polarisation and the 21-cm line fluctuations from cosmic reionisation
arXiv:0802.3893 · doi:10.1111/j.1365-2966.2008.13606.x
Abstract
The cosmic microwave background (CMB) polarisation and the 21 cm line fluctuations are powerful probes of cosmological reionisation. We study how the cross-correlation between the CMB polarisation (E-modes) and the 21 cm line fluctuations can be used to gain further understanding of the reionisation history, within the framework of inhomogeneous reionisation. Since the E-mode polarisation reflects the amplitude of the quadrupole component of the CMB temperature fluctuations, the angular power spectrum of the cross-correlation exhibits oscillations at all multipoles. The first peak of the power spectrum appears at the scale corresponding to the quadrupole at the redshift that is probed by the 21 cm line fluctuations. The peak reaches its maximum value in redshift when the average ionisation fraction of the universe is about half. On the other hand, on small scales, there is a damping that depends on the duration of reionisation. Thus, the cross-correlation between the CMB polarisation and the 21 cm line fluctuations has the potential to constrain accurately the epoch and the duration of reionisation.
References in corpus (24)
- Wilkinson Microwave Anisotropy Probe (WMAP) Three Year Results: Implications for Cosmology
- Three Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Polarization Analysis
- Constraining the Evolution of the Ionizing Background and the Epoch of Reionization with z ~ 6 Quasars II: A Sample of 19 Quasars
- In the Beginning: The First Sources of Light and the Reionization of the Universe
- 21-cm Tomography of the Intergalactic Medium at High Redshift
- Anisotropies in the Cosmic Microwave Background: An Analytic Approach
- CMB Anisotropies: Total Angular Momentum Method
- Simulating Cosmic Reionization at Large Scales I: the Geometry of Reionization
- Measuring the Small-Scale Power Spectrum of Cosmic Density Fluctuations Through 21 cm Tomography Prior to the Epoch of Structure Formation
- The Universe Was Reionized Twice
- 21 cm fluctuations from inhomogeneous X-ray heating before reionization
- Probing Beyond the Epoch of Hydrogen Reionization with 21 Centimeter Radiation
- Radio Signatures of HI at High Redshift: Mapping the End of the ``Dark Ages''
- The CMBR fluctuations from HI perturbations prior to reionization
- Polarization of the Microwave Background in Reionized Models
- The Effects of Dark Matter Decay and Annihilation on the High-Redshift 21 cm Background
- 21-cm Background Anisotropies Can Discern Primordial Non-Gaussianity
- Non-uniform reionization by galaxies and its effect on the cosmic microwave backgroun
- The Cosmic Reionization History as Revealed by the CMB Doppler--21-cm Correlation
- Probing Primordial Magnetic Fields with the 21cm Fluctuations
- Reionization History from Coupled CMB/21cm Line Data
- Cross-Correlation Studies between CMB Temperature Anisotropies and 21 cm Fluctuations
- Reionization and the large-scale 21 cm-cosmic microwave background cross correlation
- Cross-correlation studies as a probe of reionization physics
Cited by in corpus (10)
- Reionization and the Cosmic Dawn with the Square Kilometre Array
- The Epoch of Reionization
- Cross-correlation Study between the Cosmological 21-cm Signal and the kinetic Sunyaev-Zel'dovich effect
- Probing patchy reionization through tau-21cm correlation statistics
- Exploring the cosmic dawn and epoch of reionization with 21cm line
- Effect of supersonic relative motion between baryons and dark matter on collapsed objects
- Detectability of the 21 cm-CMB cross-correlation from the EoR
- Model independent approaches to reionization in the analysis of upcoming CMB data
- Reconstruction of Reionization History through Dispersion Measure of Fast Radio Bursts
- Standard Model Prediction for Cosmological 21cm Circular Polarization