Cross-correlating CMB polarization with local large scale structures
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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.
4 pages, use moriond.sty, to appear in the proceedings of the XXXVth Rencontres de Moriond "Energy densities in the Universe"
4 pages, use moriond.sty, to appear in the proceedings of the XXXVth Rencontres de Moriond "Energy densities in the Universe"