# CMB signatures of metal-free star formation and Planck 2015 polarization data

@article{Miranda2017CMBSO,
title={CMB signatures of metal-free star formation and Planck 2015 polarization data},
author={V. Miranda and A. Lidz and C. Heinrich and W. Hu},
journal={Monthly Notices of the Royal Astronomical Society},
year={2017},
volume={467},
pages={4050-4056}
}
• V. Miranda, +1 author W. Hu
• Published 2017
• Physics
• Monthly Notices of the Royal Astronomical Society
• Standard analyses of the reionization history of the universe from Planck cosmic microwave background (CMB) polarization measurements consider only the overall optical depth to electron scattering ($\tau$), and further assume a step-like reionization history. However, the polarization data contain information beyond the overall optical depth, and the assumption of a step-like function may miss high redshift contributions to the optical depth and lead to biased $\tau$ constraints. Accounting for… CONTINUE READING