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• W2121179073 abstract "We develop the formalism necessary to study four-point functions of the cosmic microwave background (CMB) temperature and polarization fields. We determine the general form of CMB trispectra, with the constraints imposed by the assumption of statistical isotropy of the CMB fields, and derive expressions for their estimators, as well as their Gaussian noise properties. We apply these techniques to initial non-Gaussianity of a form motivated by inflationary models. Due to the large number of four-point configurations, the sensitivity of the trispectra to initial non-Gaussianity approaches that of the temperature bispectrum at high multipole moment. These trispectra techniques will also be useful in the study of secondary anisotropies induced for example by the gravitational lensing of the CMB by the large scale structure of the universe." @default.
• W2121179073 created "2016-06-24" @default.
• W2121179073 creator A5032638535 @default.
• W2121179073 creator A5086613602 @default.
• W2121179073 date "2002-09-30" @default.
• W2121179073 modified "2023-09-24" @default.
• W2121179073 title "Angular trispectra of CMB temperature and polarization" @default.
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• W2121179073 doi "https://doi.org/10.1103/physrevd.66.063008" @default.
• W2121179073 hasPublicationYear "2002" @default.
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