Cross-correlating CMB polarization with local large scale structures
Astrophysics
2007-05-23 v1
Abstract
We study heterogeneous quantities that efficiently cross-correlate the lensing information encoded in CMB polarization and large-scale structures recovered from weak lensing galaxy surveys. These quantities allow us to take advantage of the special features of weak lensing effect on CMB B-polarization and of the high (40%) cross-correlation between the two data sets. We show that these objects are robust to filtering effects, have a low intrinsic cosmic variance (around 8% for small 100 square degrees surveys) and can be used as an original constraint on the vacuum energy density.
Keywords
Cite
@article{arxiv.astro-ph/0003376,
title = {Cross-correlating CMB polarization with local large scale structures},
author = {K. Benabed and F. Bernardeau and L. Van Waerbeke},
journal= {arXiv preprint arXiv:astro-ph/0003376},
year = {2007}
}
Comments
4 pages, use moriond.sty, to appear in the proceedings of the XXXVth Rencontres de Moriond "Energy densities in the Universe"