Beyond the Power Spectrum: Primordial and Secondary Non-Gaussianity in the Microwave Background

被引：0

作者：

Smith, Kendrick M. ^{[1
]}

机构：

[1] Princeton Univ, Dept Astrophys Sci, Princeton, NJ 08544 USA

来源：

NEW HORIZONS IN ASTRONOMY: FRANK N BASH SYMPOSIUM 2009 | 2010年 / 432卷

关键词：

GRAVITY-WAVES; PERTURBATIONS; ANISOTROPIES; POLARIZATION; PROBE;

D O I：

暂无

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Cosmic microwave background observations are most commonly analyzed by estimating the power spectrum. In the limit where the CMB statistics are perfectly Gaussian, this extracts all the information, but the CMB also contains detectable non-Gaussian contributions from secondary, and possibly primordial, sources. We review possible sources of CMB non-Gaussianity and describe statistical techniques which are optimized for measuring them, complementing the power spectrum analysis. The machinery of N-point correlation functions provides a unifying framework for optimal estimation of primordial non-Gaussian signals or gravitational lensing. We review recent results from applying these estimators to data from the WMAP satellite mission.

引用

页码：147 / 162

页数：16

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