Speaker
Cyril Pitrou
(CNRS, IAP)
Description
The current concordance model of cosmology has been extremely successful in constraining the global properties of the universe. However, it is based on the assumption of statistical homogeneity and isotropy, and we are thus lead to test this global geometry. In practice, it is sufficient to constrain mild anisotropies, and I will show how anisotropy can be considered as a special long-wavelength perturbation around a Friedmann-Lemaître space-time. Within this framework, the same tools can be used to compute the anisotropic and non-stochastic perturbation, and the statistically isotropic and stochastic ones, allowing to test late anisotropy from all cosmological observables.
Primary author
Cyril Pitrou
(CNRS, IAP)
