CMB Anisotropies at Second-Order II: Analytical Approach
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 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.
Keywords
Cite
@article{arxiv.astro-ph/0610110,
title = {CMB Anisotropies at Second-Order II: Analytical Approach},
author = {Nicola Bartolo and Sabino Matarrese and Antonio Riotto},
journal= {arXiv preprint arXiv:astro-ph/0610110},
year = {2010}
}
Comments
38 pages, LaTeX file; typos corrected, discussion improved in Sec. IIIA and VII, matching the version published in JCAP