CMB lensing power spectrum with next generation surveys
Cosmology and Nongalactic Astrophysics
2022-03-17 v1
Abstract
We introduce a new estimator of the CMB lensing power spectrum, together with its likelihood, based on iterative lensing reconstruction. Despite the increased complexity of the lensing maps, this estimator shares similarities with the standard quadratic estimator. Most importantly, it is unbiased towards the assumptions done on the noise and cosmology for the lensing reconstruction. This new spectrum estimator can double the constraints on the lensing amplitude compared to the quadratic estimator, while keeping numerical cost under control and being robust to errors.
Keywords
Cite
@article{arxiv.2203.08152,
title = {CMB lensing power spectrum with next generation surveys},
author = {Louis Legrand and Julien Carron},
journal= {arXiv preprint arXiv:2203.08152},
year = {2022}
}
Comments
Contribution to the 2022 Cosmology session of the 56th Rencontres de Moriond, 2 pages, 2 figures