The needlets bispectrum

Abstract

The purpose of this paper is to join two different threads of the recent literature on random fields on the sphere, namely the statistical analysis of higher order angular power spectra on one hand, and the construction of second-generation wavelets on the sphere on the other. To this aim, we introduce the needlets bispectrum and we derive a number of convergence results. Here, the limit theory is developed in the high resolution sense. The leading motivation of these results is the need for statistical procedures for searching non-Gaussianity in Cosmic Microwave Background radiation.

Published in at http://dx.doi.org/10.1214/08-EJS197 the Electronic Journal of Statistics (http://www.i-journals.org/ejs/) by the Institute of Mathematical Statistics (http://www.imstat.org)

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• Primordial Non-Gaussianity in the Cosmic Microwave Background
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• Detecting Bispectral Acoustic Oscillations from Inflation Using a New Flexible Estimator
• Exact Wavelets on the Ball
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• Cosmological Applications of the Gaussian Kinematic Formula
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• Adaptive Nonparametric Regression on Spin Fiber Bundles