# Observing the Epoch of Reionization with the Cosmic Microwave Background

@article{Reichardt2015ObservingTE,
title={Observing the Epoch of Reionization with the Cosmic Microwave Background},
author={Christian L. Reichardt},
journal={arXiv: Cosmology and Nongalactic Astrophysics},
year={2015}
}
• C. Reichardt
• Published 3 November 2015
• Physics
• arXiv: Cosmology and Nongalactic Astrophysics
We review the observable consequences of the epoch of reionization (EoR) on the cosmic microwave background (CMB), and the resulting constraints on the EoR. We discuss how Thomson scattering with the free electrons produced during EoR equates to an optical depth for CMB photons. The optical depth measurements from the WMAP and Planck satellites, using large-scale CMB polarization power spectra, is one of the few current constraints on the timing of cosmic reionization. We also present forecasts…

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