A high-significance detection of non-Gaussianity in the WMAP 5-year data using directional spherical wavelets

Preprint

29 April 2008

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.0803.2157

Abstract

We repeat the directional spherical real Morlet wavelet analysis, used to detect non-Gaussianity in the Wilkinson Microwave Anisotropy Probe (WMAP) 1-year and 3-year data (McEwen et al. 2005, 2006a), on the WMAP 5-year data. The non-Gaussian signal detected previously is present in the 5-year data at a slightly increased statistical significance of approximately 99%. Localised regions that contribute most strongly to the non-Gaussian signal are found to be very similar to those detected in the previous releases of the WMAP data. When the localised regions detected in the 5-year data are excluded from the analysis the non-Gaussian signal is eliminated.

Keywords

DIRECTIONAL SPHERICAL
LOCALISED REGIONS
WAVELET ANALYSIS
GAUSSIAN SIGNAL
ANISOTROPY
YEAR DATA
WAVELETS
DETECTED
WMAP

All Related Versions

Version 1, 2008-03-14, ArXiv
Version 2, 2008-04-29, ArXiv
Version 1, 2006-04-13, ArXiv (Unconfirmed version)
Version 2, 2006-10-05, ArXiv (Unconfirmed version)
Published version: Monthly Notices of the Royal Astronomical Society, 388 (2), 659.

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