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Cross-correlating CMB polarization with local large scale structures

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HAL-CEA
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  • [Phys.Astr.Co] Physics [Physics]/Astrophysics [Astro-Ph]/Cosmology And Extra-Galactic Astrophysics [
  • [Sdu.Astr] Sciences Of The Universe [Physics]/Astrophysics [Astro-Ph]
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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.

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