Weak gravitational lensing of the CMB

  title={Weak gravitational lensing of the CMB},
  author={Antony Lewis and Anthony Challinor},
  journal={Physics Reports},
Weak lensing of the CMB
The cosmic microwave background (CMB) represents a unique source for the study of gravitational lensing. It is extended across the entire sky, partially polarized, located at the extreme distance of
Lensing of 21-cm fluctuations by primordial gravitational waves.
Weak-gravitational-lensing distortions to the intensity pattern of 21-cm radiation from the dark ages can be decomposed geometrically into curl and curl-free components, allowing tensor-to-scalar ratios conceivably as small as r~10(-9)-far smaller than those currently accessible-to be probed.
Detection of gravitational lensing in the cosmic microwave background
Gravitational lensing of the cosmic microwave background (CMB), a long-standing prediction of the standard cosmological model, is ultimately expected to be an important source of cosmological
In this paper, we revisit the weak gravitational lensing of the cosmic microwave background (CMB). The key point is that the deflection angle of CMB photons varies with the redshift. From this we
A Large Sky Simulation of the Gravitational Lensing of the Cosmic Microwave Background
Large-scale structure deflects cosmic microwave background (CMB) photons. Since large angular scales in the large-scale structure contribute significantly to the gravitational lensing effect, a
CMB Lensing Constraints on Neutrinos and Dark Energy
Signatures of lensing of the cosmic microwave background radiation by gravitational potentials along the line of sight carry with them information on the matter distribution, neutrino masses, and
3D weak gravitational lensing of the CMB and galaxies
In this paper we present a power spectrum formalism that combines the full three-dimensional information from the galaxy ellipticity field, with information from the cosmic microwave background
Cosmic shear from scalar-induced gravitational waves
Weak gravitational lensing by foreground density perturbations generates a gradient mode in the shear of background images. In contrast, cosmological tensor perturbations induce a nonzero curl mode
CMBR weak lensing and HI 21-cm cross-correlation angular power spectrum
Weak gravitational lensing of the CMBR manifests as a secondary anisotropy in the temperature maps. The effect, quantified through the shear and convergence fields imprint the underlying large scale
Gravitational lensing of the cosmic neutrino background
We study gravitational lensing of the cosmic neutrino background. This signal is undetectable for the foreseeable future, but there is a rich trove of information available. At least some of the


Gravitational lensing effect on cosmic microwave background polarization
We investigate the effect of gravitational lensing by matter distribution in the universe on the cosmic microwave background polarization power spectra and temperature-polarization cross-correlation
Gravitational lensing of cosmic microwave background anisotropies and cosmological parameter estimation
Gravitational lensing, caused by matter perturbations along the line-of-sight to the last scattering surface, can modify the shape of the cosmic microwave background (CMB) anisotropy power spectrum.
Lensing reconstruction of primordial cosmic microwave background polarization
We discuss the possibility to directly reconstruct the cosmic microwave background (CMB) polarization field at the last scattering surface by accounting for modifications imposed by the gravitational
Geometry of weak lensing of CMB polarization
Hu [Phys. Rev. D62 (2000) 043007] has presented a harmonic-space method for calculating the effects of weak gravitational lensing on the cosmic microwave background (CMB) over the full sky. Computing
Lensing reconstruction with CMB temperature and polarization
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
Cosmic Shear of the Microwave Background: The Curl Diagnostic
Weak-lensing distortions of the cosmic-microwave-background (CMB) temperature and polarization patterns can reveal important clues to the intervening large-scale structure. The effect of lensing is
Weak lensing of the Sunyaev–Zel'dovich sky
We address the question of whether the angular power spectrum of the thermal SunyaevZel'dovich (SZ) sky is further distorted by weak gravitational lensing of foreground large-scale structures. Using
The Far-Infrared Background Correlation with Cosmic Microwave Background Lensing
Intervening large-scale structure distorts cosmic microwave background (CMB) anisotropies via gravitational lensing. The same large-scale structure, traced by dusty star-forming galaxies, also
Cross-correlation of CMB with large-scale structure: Weak gravitational lensing
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Gravitational lensing as a contaminant of the gravity wave signal in the CMB
Gravity waves (GWs) in the early Universe generate B-type polarization in the cosmic microwave background (CMB), which can be used as a direct way to measure the energy scale of inflation.