Improving small-scale CMB lensing reconstruction
نویسندگان
چکیده
منابع مشابه
Reconstruction of the CMB lensing for Planck
Aims. We prepare real-life Cosmic Microwave Background (CMB) lensing extraction with the forthcoming Planck satellite data, by studying two systematic effects related to the foregrounds contamination: the impact of foreground residuals after a component separation on the lensed CMB map, and of removing a large contaminated region of the sky. Methods. We first use the Generalized Morphological C...
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Weak gravitational lensing by an intervening large-scale structure induces a distinct signature in the cosmic microwave background ~CMB! that can be used to reconstruct the weak-lensing displacement map. Estimators for individual Fourier modes of this map can be combined to produce an estimator for the lensing-potential power spectrum. The naive estimator for this quantity will be biased upward...
متن کاملFull covariance of CMB and lensing reconstruction power spectra
CMB and lensing reconstruction power spectra are powerful probes of cosmology. However they are correlated, since the CMB power spectra are lensed and the lensing reconstruction is constructed using CMB multipoles. We perform a full analysis of the autoand cross-covariances, including polarization power spectra and minimum variance lensing estimators, and compare with simulations of idealized f...
متن کاملWeak Lensing of the CMB by Large-Scale Structure
Several recent papers have studied lensing of the CMB by large-scale structures, which probes the projected matter distribution from z = 10 to z ≃ 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...
متن کاملCMB Lensing: Polarization, Large-Scale Structure and the Primordial Bispectrum
Gravitational lensing of photons in the Cosmic Microwave Background (CMB) can be described by an integrated potential along the line of sight, the CMB lensing potential. Covariances in maps of the CMB are generated by the lensing effect, and are used to reconstruct the lensing potential itself, which is a useful probe of the matter distribution. The CMB lensing potential has been measured to hi...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 2019
ISSN: 2470-0010,2470-0029
DOI: 10.1103/physrevd.100.023547