Real space lensing reconstruction using cosmic microwave background polarization

Abstract

We develop a method of reconstructing the lensing field from lensed CMB temperature and polarization maps in real space as an alternative to the harmonic space estimators currently in use by extending an existing real space lensing estimator for temperature to polarization. Real space estimators have the advantage of being local in nature and they are thus equipped to deal with the nonuniform sky coverage, especially galactic cuts and point source excisions, found in experimental data. We characterize some of the properties and limitations of these estimators and test them on simulated maps with Planck, AdvACT and CMB-S4 noise. We show that the reconstructions for large-scale lensing fields are accurate, and that the polarization reconstructions improve on those from CMB temperature maps for future experiments as expected. High-fidelity lensing maps can be reconstructed with futuristic experiments like CMB-S4.

33 pages, 9 figures, submitted to JCAP

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Cited by in corpus (12)

• The Atacama Cosmology Telescope: A Measurement of the DR6 CMB Lensing Power Spectrum and its Implications for Structure Growth
• The Atacama Cosmology Telescope: Component-separated maps of CMB temperature and the thermal Sunyaev-Zel'dovich effect
• Foreground-immune CMB lensing with shear-only reconstruction
• CMB lensing reconstruction biases in cross-correlation with large-scale structure probes
• On the effect of non-Gaussian lensing deflections on CMB lensing measurements
• Foreground Biases on Primordial Non-Gaussianity Measurements from the CMB Temperature Bispectrum: Implications for Planck and Beyond
• Lensing reconstruction from line intensity maps: the impact of gravitational nonlinearity
• Weak Lensing of Intensity Mapping: the Cosmic Infrared Background
• Foreground-immune CMB lensing reconstruction with polarization
• Bias to CMB lensing from lensed foregrounds
• CMB lensing with shear-only reconstruction on the full sky
• Cosmic Tidal Reconstruction with Halo Fields