Physics of our days

Searching for non-Gaussianity in the observational cosmic microwave background data

Special Astrophysical Observatory, Russian Academy of Sciences, Nizhnii Arkhyz, Zelenchukskiy Region, Karachai-Cherkessian Republic, Russian Federation

Methods for searching for non-Gaussianity in the WMAP data are reviewed and the associated problems related to the cosmic microwave background (CMB) data analysis are discussed. Evidence for non-Gaussianity has been obtained by various methods and from a number of multipole ranges. Different approaches to searching for non-Gaussian CMB data are sensitive to different manifestations of non-Gaussianity, which sometimes are due to the primordial non-Gaussianity and sometimes to galactic foregrounds and/or systematic residuals remaining after the data analysis that are difficult to take into account.

Fulltext is available at IOP
PACS: 95.75.−z, 98.70.Vc, 98.80.−k (all)
DOI: 10.3367/UFNe.0182.201211d.1177
Citation: Verkhodanov O V "Searching for non-Gaussianity in the observational cosmic microwave background data" Phys. Usp. 55 1098–1114 (2012)
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Received: 13th, July 2011, revised: 1st, December 2011, 6th, December 2011

Оригинал: Верходанов О В «Поиск негауссовости в наблюдательных данных по реликтовому микроволновому фону» УФН 182 1177–1193 (2012); DOI: 10.3367/UFNr.0182.201211d.1177

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