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Title:
CMB anisotropies at second-order II: analytical approach
Authors:
Bartolo, Nicola; Matarrese, Sabino; Riotto, Antonio
Affiliation:
AA(Dipartimento di Fisica "G. Galilei", Università di Padova, via Marzolo 8, Padova I-35131, Italy ; The Abdus Salam International Centre for Theoretical Physics, Strada Costiera 11, 34100 Trieste, Italy ), AB(Dipartimento di Fisica "G. Galilei", Università di Padova, via Marzolo 8, Padova I-35131, Italy ; INFN, Sezione di Padova, via Marzolo 8, Padova I-35131, Italy ), AC(INFN, Sezione di Padova, via Marzolo 8, Padova I-35131, Italy ; CERN, Theory Division, CH-1211 Geneva 23, Switzerland ; )
Publication:
Journal of Cosmology and Astroparticle Physics, Issue 01, pp. 019 (2007).
Publication Date:
01/2007
Origin:
IOP
DOI:
10.1088/1475-7516/2007/01/019
Bibliographic Code:
2007JCAP...01..019B

Abstract

We provide an analytical approach to the second-order cosmic microwave background (CMB) anisotropies generated by the non-linear dynamics taking place at last scattering. We study the acoustic oscillations of the photon baryon fluid in the tight coupling limit and we extend at second order the Meszaros effect. We allow for a generic set of initial conditions due to primordial non-Gaussianity and we compute all of the additional contributions arising at recombination. Our results are useful to provide the full second-order radiation transfer function at all scales necessary for establishing the level of non-Gaussianity in the CMB.
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