Astronomy and Astrophysics – Astrophysics – Cosmology and Extragalactic Astrophysics
Scientific paper
2010-01-22
Astronomy and Astrophysics
Astrophysics
Cosmology and Extragalactic Astrophysics
118 pages, 11 figures, LaTeX file. Invited Review for the special issue "Testing the Gaussianity and Statistical Isotropy of t
Scientific paper
We review in a pedagogical way the present status of the impact of non-Gaussianity (NG) on the Cosmic Microwave Background (CMB) anisotropies. We first show how to set the initial conditions at second-order for the (gauge invariant) CMB anisotropies when some primordial NG is present. However, there are many sources of NG in CMB anisotropies, beyond the primordial one, which can contaminate the primordial signal. We mainly focus on the NG generated from the post-inflationary evolution of the CMB anisotropies at second-order in perturbation theory at large and small angular scales, such as the ones generated at the recombination epoch. We show how to derive the equations to study the second-order CMB anisotropies and provide analytical computations to evaluate their contamination to primordial NG (complemented with numerical examples). We also offer a brief summary of other secondary effects. This review requires basic knowledge of the theory of cosmological perturbations at the linear level.
Bartolo Nicola
Matarrese Sabino
Riotto Antonio
No associations
LandOfFree
Non-Gaussianity and the Cosmic Microwave Background Anisotropies does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Non-Gaussianity and the Cosmic Microwave Background Anisotropies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Non-Gaussianity and the Cosmic Microwave Background Anisotropies will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-655517