Weak Lensing of the CMB by Large-Scale Structure

Alexandre Amblard; Chris Vale; Martin White

doi:10.1016/j.newast.2004.05.003

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arXiv · astro-ph/0403075

Weak Lensing of the CMB by Large-Scale Structure

Alexandre Amblard·Chris Vale·Martin White

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Abstract

Several recent papers have studied lensing of the CMB by large-scale structures, which probes the projected matter distribution from $z=10^3$ to $z\simeq 0$. This interest is motivated in part by upcoming high resolution, high sensitivity CMB experiments, such as APEX/SZ, ACT, SPT or Planck, which should be sensitive to lensing. In this paper we examine the reconstruction of the large-scale dark matter distribution from lensed CMB temperature anisotropies. We go beyond previous work in using numerical simulations to include higher order, non-Gaussian effects and study how well the quadratic estimator of \cite{Hu01a} is able to recover the input field. We also study contamination by kinetic Sunyaev-Zel'dovich signals, which is spectrally indistinguishable from lensed CMB anisotropies. We finish by estimating the sensitivity of the previously cited experiments.

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Alexandre Amblard, Chris Vale, Martin White. 2004-05-14. Weak Lensing of the CMB by Large-Scale Structure. https://doi.org/10.1016/j.newast.2004.05.003

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