Can CMB Lensing Help Cosmic Shear Surveys?
Cosmology and Nongalactic Astrophysics
2013-11-12 v1
Abstract
Yes! Upcoming galaxy shear surveys have the potential to significantly improve our understanding of dark energy and neutrino mass if lensing systematics can be sufficiently controlled. The cross-correlations between the weak lensing shear, galaxy number counts from a galaxy redshift survey, and the CMB lensing convergence can be used to calibrate the shear multiplicative bias, one of the most challenging systematics in lensing surveys. These cross-correlations can significantly reduce the deleterious effects of the uncertainties in multiplicative bias.
Cite
@article{arxiv.1311.2338,
title = {Can CMB Lensing Help Cosmic Shear Surveys?},
author = {Sudeep Das and Josquin Errard and David Spergel},
journal= {arXiv preprint arXiv:1311.2338},
year = {2013}
}
Comments
5 pages, 2 figures