GL2 - Statistics and Geometry of Weak Lensing Data |
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Speaker |
Calabrese, Matteo |
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| Talk Title |
Multiple Lensing of the Cosmic Microwave Background (CMB) |
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Abstract |
We describe the effect of gravitational lensing on the Cosmic Microwave Background (CMB) anisotropies due to the matter distribution in the Universe. We trace the primordial CMB photons travelling through intervening large-scale structures (LSS) distribution predicted by N-Body numerical simulations with a particular focus on the precise recovery of the lens-induced polarized counterpart of the source plane. We apply both a multiple plane ray-tracing and an effective deflection approach based on the Born approximation to deflect the CMB photons trajectories through the simulated lightcone. We discuss the results obtained with both these methods together with the impact of LSS non-linear evolution on the CMB temperature and polarization power spectra. Finally, we address the construction of mock catalogues from said numerical simulations to replicate Cross-Correlation (XC) studies of LSS survey with CMB experiments. |
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