Gravitational lensing effect on cosmic microwave background polarization
نویسندگان
چکیده
منابع مشابه
Gravitational lensing on the Cosmic Microwave Background by gravity waves
We study the effect of a stochastic background of gravitational waves on the gravitational lensing of the Cosmic Microwave Background (CMB) radiation. It has been shown that matter density inhomogeneities produce a smoothing of the acoustic peaks in the angular power spectrum of the CMB anisotropies. A gravitational wave background gives rise to an additional smoothing of the spectrum. For the ...
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Cosmological inhomogeneities gravitationally deflect radiation propagating from distant sources, transforming the spatial and angular correlation functions of intrinsic source properties. For a gaussian distribution of deflections (e.g. from a primordial gaussian density perturbation spectrum or from the central limit theorem) we calculate the probability distributions for geodesic deviations. ...
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Adopting the accepted interpretation of the cosmic microwave background (CMBR) as a relic of the early hot universe we show that any angular intensity variations existing in the background at the “last scattering surface” at the redshift of 10s will induce bright fluctuations through gravitational lensing by intervening masses. The resulting temperature variations AT are estimated for gravitati...
متن کاملReconstruction of lensing from the cosmic microwave background polarization
Gravitational lensing of the cosmic microwave background ~CMB! polarization field has been recognized as a potentially valuable probe of the cosmological density field. We apply likelihood-based techniques to the problem of lensing of CMB polarization and show that if the B-mode polarization is mapped, then likelihoodbased techniques allow significantly better lensing reconstruction than is pos...
متن کاملEvidence for gravitational lensing of the cosmic microwave background polarization from cross-correlation with the cosmic infrared background.
We reconstruct the gravitational lensing convergence signal from cosmic microwave background (CMB) polarization data taken by the Polarbear experiment and cross-correlate it with cosmic infrared background maps from the Herschel satellite. From the cross spectra, we obtain evidence for gravitational lensing of the CMB polarization at a statistical significance of 4.0σ and indication of the pres...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 1998
ISSN: 0556-2821,1089-4918
DOI: 10.1103/physrevd.58.023003