Goodness-of-fit statistics and CMB data sets

被引：1

作者：

Douspis, M

Bartlett, JG

Blanchard, A

机构：

[1] Observ Midi Pyrenees, F-31400 Toulouse, France

[2] Astrophys, Oxford OX1 3RH, England

[3] Univ Paris 07, APC, Paris 05, France

来源：

ASTRONOMY & ASTROPHYSICS | 2003年 / 410卷 / 01期

关键词：

cosmology : cosmic microwave background; cosmology : observations; cosmology : theory;

D O I：

10.1051/0004-6361:20030869

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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.

引用

页码：11 / 16

页数：6

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