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Primordial non-Gaussianity: local curvature method and statistical significance of constraints on f_NL from WMAP data
P. Cabella, M. Liguori, F. K. Hansen +4
We test the consistency of estimates of the non-linear coupling constant f_{NL} using non-Gaussian CMB maps generated by the method described in (Liguori, Matarrese and Moscardini…
Asymmetries in the local curvature of the WMAP data
Frode K. Hansen, Paolo Cabella, Domenico Marinucci +1
We use the local curvature to investigate the possible existence of non-Gaussianity/asymmetry in the WMAP data. Considering the full sky we find results which are consistent with t…
Unbiased Estimation of an Angular Power Spectrum
G. Polenta, D. Marinucci, A. Balbi +5
We discuss the derivation of the analytic properties of the cross-power spectrum estimator from multi-detector CMB anisotropy maps. The method is computationally convenient and it…
Search for non-Gaussianity in pixel, harmonic and wavelet space: compared and combined
Paolo Cabella, Frode Hansen, Domenico Marinucci +2
We present a comparison between three approaches to test non-Gaussianity of cosmic microwave background data. The Minkowski functionals, the empirical process method and the skewne…