en
Scientific article
Open access
English

Anisotropies in the Cosmic Microwave Background Theoretical Foundations

ContributorsDurrer, Ruthorcid
Published inInternational journal of theoretical physics, vol. 36, no. 11, p. 2469-2487
Publication date1997
Abstract

The analysis of anisotropies in the cosmic microwave background (CMB) has become an extremely valuable tool for cosmology. We even have hopes that planned CMB anisotropy experiments may revolutionize cosmology. Together with determinations of the CMB spectrum, they represent the first cosmological precision measurements. This is illustrated in the talk by Anthony Lasenby. The value of CMB anisotropies lies to a big part in the simplicity of the theoretical analysis. Fluctuations in the CMB can be determined almost fully within linear cosmological perturbations theory and are not severely influenced by complicated nonlinear physics. In this contribution the different physical processes causing or influencing anisotropies in the CMB are discussed. The geometry perturbations at and after last scattering, the acoustic oscillations in the baryon-photon-plasma prior to recombination, and the diffusion damping during the process of recombination. The perturbations due to the fluctuating gravitational field, the so called Sachs-Wolfe contribution, is described in a very general form using the Weyl tensor of the perturbed geometry.

Citation (ISO format)
DURRER, Ruth. Anisotropies in the Cosmic Microwave Background Theoretical Foundations. In: International journal of theoretical physics, 1997, vol. 36, n° 11, p. 2469–2487. doi: 10.1007/BF02768937
Main files (1)
Article (Accepted version)
accessLevelPublic
Identifiers
ISSN of the journal0020-7748
549views
233downloads

Technical informations

Creation02/26/2009 5:00:07 PM
First validation02/26/2009 5:00:07 PM
Update time03/14/2023 3:02:38 PM
Status update03/14/2023 3:02:38 PM
Last indexation01/15/2024 6:15:04 PM
All rights reserved by Archive ouverte UNIGE and the University of GenevaunigeBlack