HAL : in2p3-00022014, version 1

arXiv : astro-ph/0305428

DOI : 10.1051/0004-6361:20030869

Fiche détaillée

Récupérer au format BibTeX - EndNote - TEI - RefWorks -

Astronomy and Astrophysics 410 (2003) 11-16

Goodness-of-fit statistics and CMB data sets

M. Douspis1, J. G. Bartlett1, 2, A. Blanchard1

(2003)

Application of a Goodness-of-fit (GOF) statistic is an essential element in parameter estimation. We discuss the computation of GOF when estimating parameters from anisotropy measurements of the cosmic microwave background (CMB), and we propose two GOF statistics to be used when employing approximate band-power likelihood functions. They are based on an approximate form for the distribution of band-power estimators that requires only minimal experimental information to construct. Monte Carlo simulations of CMB experiments show that the proposed form describes the true distributions quite well. We apply these GOF statistics to current CMB anisotropy data and discuss the results.

1 :	UMS 831 - UMS 831 unité mixte de service
2 :	PCC - Physique Corpusculaire et Cosmologie - Collège de France

Thème(s)

:

Planète et Univers/Astrophysique Physique/Astrophysique/Cosmologie et astrophysique extra-galactique

Mot(s)-clé(s) : cosmology: cosmic microwave background – cosmology: observations – cosmology: theory

in2p3-00022014, version 1

http://hal.in2p3.fr/in2p3-00022014

oai:hal.in2p3.fr:in2p3-00022014

Contributeur : Simone Lantz <>

Soumis le : Lundi 15 Janvier 2007, 13:06:38

Dernière modification le : Lundi 15 Janvier 2007, 13:42:53