Late reionizations of the Universe and their manifestation in the CMB data

Abstract

We investigate two sets of two-epoched reionization models and their manifestation in the CMB anisotropy and polarization data of the recent WMAP project and make some predictions for the future PLANCK missions. In the first set of models, the universe was reionized twice, first at z~15 by population III stars and then at z~6 by stars in large galaxies. In the second set of models, the extra peak-like reionization at high redshifts z > 100 is induced by the decay of unstable particles, followed by the standard picture of reionization at z~6. We examine the general properties of these two-epoched reionization models and their implication in the WMAP CMB temperature anisotropy-polarization cross-correlation. We have shown that these models have comparable likelihood values for the WMAP data and distinct characters which can be tested with the Planck high sensitivities.

6 pages, 9 figures, accepted for publication in MNRAS

References in corpus (4)

• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Angular Power Spectrum
• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Parameter Estimation Methodology
• The Universe Was Reionized Twice
• Ionization history of the cosmic plasma in the light of the recent CBI and future PLANCK data

Cited by in corpus (15)

• Fundamental Physics with the Square Kilometre Array
• The First Cosmic Structures and their Effects
• Model-independent constraints on reionization from large-scale CMB polarization
• The Epoch of Reionization
• Magnetized CMB observables: a dedicated numerical approach
• Reionization History from Coupled CMB/21cm Line Data
• Approximate Analytic Spectra of Reionized CMB Anisotropies and Polarization generated by Relic Gravitational Waves
• Semi-analytical description of clumping factor and CMB free-free distortions from reionization
• CMB polarization constraints on radiative feedback
• Constraining the epoch of reionization from the observed properties of the high-z Universe
• Antimatter from the cosmological baryogenesis and the anisotropies and polarization of the CMB radiation
• Radiative effects by high-z UV radiation background: Implications for the future CMB polarization measurements
• Cosmic Microwave Background Polarization and reionization: constraining models with a double reionization
• Recent results and perspectives on cosmology and fundamental physics from microwave surveys
• CMB polarization anisotropies from cosmological reionization: extension to B-modes