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…