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- W2220249753 abstract "Accurate predictions of cosmic microwave background (CMB) anisotropies and polarization are required for analyzing future CMB data sets, which ultimately require accurately simulated lensed maps. We present a fast, arbitrarily accurate method to simulate the effect of gravitational lensing of the CMB anisotropies and polarization fields by largescale structures on arbitrarily spaced grid points over a unit sphere using Non-equispaced fast Fourier transform (NFFT). The angular power spectrum of the simulated lensed CMB map, particularly the B-mode of polarization, agrees extremely well with analytical predictions. The analytical derivation of CMB-lensed spectra is based on non-trivial, partially resummed perturbative expansions of the correlation functions, for which our simulations therefore provide an accurate numerical validation. Lensed CMB maps simulated in this method are a useful tool for the analysis and interpretation of upcoming CMB experiments, such as PLANCK and ACT." @default.
- W2220249753 created "2016-06-24" @default.
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- W2220249753 date "2012-02-01" @default.
- W2220249753 modified "2023-09-25" @default.
- W2220249753 title "SIMULATING WEAK LENSING ON CMB MAPS" @default.
- W2220249753 cites W2624665219 @default.
- W2220249753 doi "https://doi.org/10.1142/9789814374552_0438" @default.
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