Constraining the reionization history with large angle CMB polarization
Astrophysics
2009-11-10 v2
Abstract
The first-year WMAP data release showed that the reionization optical depth to CMB photons is greater than previously thought. This follows from unexpectedly high values of the C^TE_l spectrum, for l up to ~30, presumably allowing a measurement of the E-mode polarization spectrum C^E_l sooner than expected. This note aims to test the capability of large-angle polarization experiments to explore the history of the cosmological reionization, considering also the impact of cosmic variance. In particular, here we discuss how well the ionized fraction x_e and the reionization redshift z_r can be separately measured, at various levels of instrumental noise.
Cite
@article{arxiv.astro-ph/0312416,
title = {Constraining the reionization history with large angle CMB polarization},
author = {Loris PL Colombo},
journal= {arXiv preprint arXiv:astro-ph/0312416},
year = {2009}
}
Comments
to be published in JCAP; replaced with accepted version