Lensing anomalies from the epoch of reionisation
Cosmology and Nongalactic Astrophysics
2019-11-06 v2 General Relativity and Quantum Cosmology
Abstract
Reionisation blurring is a non-linear correction to the cosmic microwave background that acts similar to weak gravitational lensing and that can be computed from linear perturbations through a blurring potential. Its impact on the cosmic microwave background is roughly two order of magnitude smaller than that of lensing, in isolation. But the blurring potential is strongly correlated with the lensing potential thereby generating a potentially observable cross-correlation. We compute for the first time the inclusive impact of reionisation blurring on the temperature angular power spectrum and discuss how much it could induce lensing anomalies
Keywords
Cite
@article{arxiv.1906.05042,
title = {Lensing anomalies from the epoch of reionisation},
author = {Christian Fidler and Julien Lesgourgues and Christophe Ringeval},
journal= {arXiv preprint arXiv:1906.05042},
year = {2019}
}
Comments
19 pages, 4 figures, uses jcappub. Discussions and references added, matches published version