[Estimation des paramètres cosmologiques : des méthodes]
Les observations des anisotropies du fond diffus cosmologique (FDC) peuvent placer de fortes contraintes sur les théories d'évolution de notre Univers. L'utilisation de telles données a permis de contraindre differents paramètres de différents cadres théoriques : l'age de l'Univers, son contenu baryonique, etc. Le but de cette contribution est de présenter differentes méthodes possibles pour extraire les paramètres cosmologiques et leurs intervalles de confiance des données du FDC. Des questions pratiques sur l'utilisation de grands nombres de paramètres sont aussi abordées.
CMB anisotropy data could put powerful constraints on theories of the evolution of our Universe. Using the observations of the large number of CMB experiments, many studies have put constraints on cosmological parameters assuming different frameworks. Assuming for example inflationary paradigm, one can compute the confidence intervals on the different components of the energy densities, or the age of the Universe, inferred by the current set of CMB observations. The aim of this Note is to present some of the available methods to derive the cosmological parameters with their confidence intervals from the CMB data, as well as some practical issues to investigate large number of parameters.
Mot clés : Anisotropies du fond de rayonnement cosmique, Cosmologie, Univers primordial
Marian Douspis 1
@article{CRPHYS_2003__4_8_881_0,
author = {Marian Douspis},
title = {Cosmological parameter estimation: methods},
journal = {Comptes Rendus. Physique},
pages = {881--890},
publisher = {Elsevier},
volume = {4},
number = {8},
year = {2003},
doi = {10.1016/j.crhy.2003.09.005},
language = {en},
}
Marian Douspis. Cosmological parameter estimation: methods. Comptes Rendus. Physique, Volume 4 (2003) no. 8, pp. 881-890. doi : 10.1016/j.crhy.2003.09.005. https://comptes-rendus.academie-sciences.fr/physique/articles/10.1016/j.crhy.2003.09.005/
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