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Local non-Gaussianity in the Cosmic Microwave Background the Bayesian way
Franz Elsner, Benjamin D. Wandelt
We introduce an exact Bayesian approach to search for non-Gaussianity of local type in Cosmic Microwave Background (CMB) radiation data. Using simulated CMB temperature maps, the n…
The primordial non-Gaussianity of local type (f_NL) in the WMAP 5-year data: the length distribution of CMB skeleton
Zhen Hou, A. J. Banday, Krzysztof M. Gorski +2
We present skeleton studies of non-Gaussianity in the CMB temperature anisotropy observed in the WMAP5 data. The local skeleton is traced on the 2D sphere by cubic spline interpola…
Probing local non-Gaussianities within a Bayesian framework
Franz Elsner, Benjamin D. Wandelt, Michael D. Schneider
Aims: We outline the Bayesian approach to inferring f_NL, the level of non-Gaussianity of local type. Phrasing f_NL inference in a Bayesian framework takes advantage of existing te…