期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 388, 期 2, 页码 659-662出版社
OXFORD UNIV PRESS
DOI: 10.1111/j.1365-2966.2008.13406.x
关键词
methods : data analysis; methods : numerical; cosmic microwave background
资金
- Science and Technology Facilities Council [ST/G002916/1] Funding Source: researchfish
We repeat the directional spherical real Morlet wavelet analysis, used previously to detect non-Gaussianity in the Wilkinson Microwave Anisotropy Probe (WMAP) 1- and 3-yr data, on the WMAP 5-yr data. The non-Gaussian signal detected previously is present in the 5-yr data at a slightly increased statistical significance of approximately 99 per cent. Localized 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 localized regions detected in the 5-yr data are excluded from the analysis, the non-Gaussian signal is eliminated.
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