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Digging out cosmological information from CMB lensing in the Planck era

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Gravitational potential of large-scale structure of the Universe generates a deflection of the paths of the CMB photons as they propagate from the last scattering surface to the observer. This gravitational deflection causes a re-mapping of the primary Gaussian CMB temperature, an effect known as CMB lensing, which can be detected and measured with the current generation of CMB experiments. As this effect strongly depends on the gravitational potential of large-scale structures which are in turn influenced by late universe parameters such as neutrino mass or curvature, CMB lensing offers a new powerful probe to constrain cosmology. In this talk, I will present some techniques used in the full-sky reconstruction of the lensing potential with Planck, and investigate the importance of non-Gaussianities induced by CMB lensing in cosmological parameter estimation.

This talk is part of the Cosmology Lunch series.

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