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2009•International Journal of Modern Physics AOpen access

TESTING GAUSSIANITY IN THE WMAP DATA OF OT FOREGROUND REDUCED MAP

Armando Bernui, M. J. Rebouças

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Abstract

A considerable effort has recently gone into the study of Gaussianity of cosmic microwave background (CMB) data. Among such attempts, there is one with two non-Gaussianity indicators, proposed by the authors, and used in a search for significant deviation from Gaussianity in the WMAP internal linear combination (ILC) maps with the KQ75 mask. Here we extend and complement these results by performing a similar analysis for the de Oliveira-Costa and Tegmark (OT) WMAP three-year KQ75 masked map, in which the foreground is reduced through a different statistical cleaning procedure.

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A considerable effort has recently gone into the study of Gaussianity of cosmic microwave background (CMB) data. Among such attempts, there is one with two non-Gaussianity indicators, proposed by the authors, and used in a search for significant deviation from Gaussianity in the WMAP internal linear combination (ILC) maps with the KQ75 mask. Here we extend and complement these results by performing a similar analysis for the de Oliveira-Costa and Tegmark (OT) WMAP three-year KQ75 masked map, in which the foreground is reduced through a different statistical cleaning procedure.

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Available abstract

A considerable effort has recently gone into the study of Gaussianity of cosmic microwave background (CMB) data. Among such attempts, there is one with two non-Gaussianity indicators, proposed by the authors, and used in a search for significant deviation from Gaussianity in the WMAP internal linear combination (ILC) maps with the KQ75 mask. Here we extend and complement these results by performing a similar analysis for the de Oliveira-Costa and Tegmark (OT) WMAP three-year KQ75 masked map, in which the foreground is reduced through a different statistical cleaning procedure.

Key concepts: CMB cold spot, Non-Gaussianity, Physics, Cosmic microwave background, Complement (music), Cosmic background radiation, Astrophysics, Anisotropy

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