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Title:
Cosmic microwave background anisotropies at second order: I
Authors:
Bartolo, Nicola; Matarrese, Sabino; Riotto, Antonio
Affiliation:
AA(The Abdus Salam International Centre for Theoretical Physics, Strada Costiera 11, 34100 Trieste, Italy ), AB(Dipartimento di Fisica "G Galilei", Università di Padova, and INFN, Sezione di Padova, via Marzolo 8, Padova I-35131, Italy ), AC(CERN, Theory Division, CH-1211 Geneva 23, Switzerland )
Publication:
Journal of Cosmology and Astroparticle Physics, Issue 06, pp. 024 (2006).
Publication Date:
06/2006
Origin:
IOP
DOI:
10.1088/1475-7516/2006/06/024
Bibliographic Code:
2006JCAP...06..024B

Abstract

We present the computation of the full system of Boltzmann equations at second order describing the evolution of the photon, baryon and cold dark matter fluids. These equations allow one to follow the time evolution of the cosmic microwave background anisotropies at second order at all angular scales from the early epoch, when the cosmological perturbations were generated, to the present, through the recombination era. This paper sets the stage for the computation of the full second-order radiation transfer function at all scales and for a generic set of initial conditions specifying the level of primordial non-Gaussianity. In a companion paper, we will present the computation of the three-point correlation function at recombination which is very relevant for the issue of non-Gaussianity in the cosmic microwave background anisotropies.
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