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Non-Gaussianity in the Cosmic Microwave Background Anisotropies at Recombination in the Squeezed limit

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arxiv 1109.2043 v2 pith:MKL3KFTZ submitted 2011-09-09 astro-ph.CO gr-qchep-phhep-th

N. Bartolo (Univ. of Padova , INFN Padova) , S. Matarrese (Univ. of Padova , A. Riotto (CERN This is my paper · ORCID
classification astro-ph.COgr-qchep-phhep-th
keywords anisotropiesbackgroundcontaminationcosmiclimitmicrowavenon-gaussianityrecombination
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We estimate analytically the second-order cosmic microwave background temperature anisotropies at the recombination epoch in the squeezed limit and we deduce the contamination to the primordial local non-Gaussianity. We find that the level of contamination corresponds to f_NL^{con}=O(1) which is below the sensitivity of present experiments and smaller than the value O(5) recently claimed in the literature.

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  1. Anisotropies and non-Gaussianity of the Cosmological Gravitational Wave Background

    astro-ph.CO 2019-08 conditional novelty 6.0 of 10

    The angular anisotropy and bispectrum of the cosmological gravitational wave background can encode primordial perturbations, including order-one frequency dependence and primordial non-Gaussianity.

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