Cross-correlation Study between the Cosmological 21-cm Signal and the kinetic Sunyaev-Zel'dovich effect

Abstract

The Universe's Epoch of Reionization (EoR) can be studied using a number of observational probes that provide complementary or corroborating information. Each of these probes suffers from its own systematic and statistical uncertainties. It is therefore useful to consider the mutual information that these data sets contain. In this paper we present a cross-correlation study between the kinetic Sunyaev-Zel'dovich effect (kSZ) -- produced by the scattering of CMB photons off free electrons produced during the reionization process -- and the cosmological 21cm signal -- which reflects the neutral hydrogen content of the Universe, as a function of redshift. The study is carried out using a simulated reionization history in 100Mpc/h scale N-body simulations with radiative transfer. In essence we find that the two probes anti-correlate. The significance of the anti-correlation signal depends on the extent of the reionization process, wherein extended histories result in a much stronger signal compared to instantaneous cases. Unfortunately however, once the primary CMB fluctuations are included into our simulation they serve as a source of large correlated noise that renders the cross-correlation signal insignificant, regardless of the reionization scenario.

submitted to MNRAS

References in corpus (18)

• Wilkinson Microwave Anisotropy Probe (WMAP) Three Year Results: Implications for Cosmology
• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• 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
• Foreground simulations for the LOFAR - Epoch of Reionization Experiment
• Fast Large-Scale Reionization Simulations
• Non-parametric foreground subtraction for 21cm epoch of reionization experiments
• Secondary anisotropies of the CMB
• The Kinetic Sunyaev-Zel'dovich Effect from Radiative Transfer Simulations of Patchy Reionization
• Time-evolution of ionization and heating around first stars and miniquasars
• Detection and extraction of signals from the epoch of reionization using higher order one-point statistics
• The Cosmic Reionization History as Revealed by the CMB Doppler--21-cm Correlation
• B-mode CMB Polarization from Patchy Screening during Reionization
• Heating of the Intergalactic Medium by Primordial Miniquasars
• The Signature of Patchy Reionization in the Polarization Anisotropy of the CMB
• Reionization and the large-scale 21 cm-cosmic microwave background cross correlation
• Cross-correlation studies as a probe of reionization physics
• The cross-correlation of the CMB polarisation and the 21-cm line fluctuations from cosmic reionisation

Cited by in corpus (23)

• Reionization and the Cosmic Dawn with the Square Kilometre Array
• Signatures of X-rays in the early Universe
• The Epoch of Reionization
• Reionization on Large Scales III: Predictions for Low-ell Cosmic Microwave Background Polarization and High-ell Kinetic Sunyaev-Zel'dovich Observables
• The Kinetic Sunyaev-Zel'dovich Effect from Reionization: Simulated Full Sky Maps at Arcminute Resolution
• Large scale simulations of H and He reionization and heating driven by stars and more energetic sources
• Exploring 21cm - Lyman Alpha emitter synergies for SKA
• Background reionization history from omniscopes
• Predictions for the 21cm-galaxy cross-power spectrum observable with LOFAR and Subaru
• LOFAR insights into the epoch of reionization from the cross power spectrum of 21cm emission and galaxies
• Probing patchy reionization through tau-21cm correlation statistics
• On the spin-temperature evolution during the epoch of reionization
• A Halo Model Approach to the $21\mathrm{cm}$ and $\mathrm{Ly}\alpha$ Cross-correlation
• Reconstructing large scales at cosmic dawn
• Investigating X-ray sources during the epoch of reionization with the 21 cm signal
• The cosmological free-free signal from galaxy groups and clusters
• Exploring the cosmic dawn and epoch of reionization with 21cm line
• Detectability of the 21 cm-CMB cross-correlation from the EoR
• Predictions for the 21cm-galaxy cross-power spectrum observable with SKA and future galaxy surveys
• Joint constraints on reionization: a framework for combining the global 21cm signal and the kinetic Sunyaev-Zel'dovich effect
• Detectability of the ${\tau }_{es}$-21cm cross-correlation: a tomographic probe of patchy reionization
• Study of systematics effects on the Cross Power Spectrum of 21 cm Line and Cosmic Microwave Background using Murchison Widefield Array Data
• Probing dark energy using anisotropies in the clustering of post-EoR HI distribution