WMAP 5-year constraints on fnl with wavelets

Understand

We present a Gaussianity analysis of the WMAP 5-year Cosmic Microwave Background (CMB) temperature anisotropy data maps.

• We use several third order estimators based on the spherical Mexican hat wavelet.
• We impose constraints on the local non-linear coupling parameter fnl using well motivated non-Gaussian simulations.
• We analyse the WMAP maps at resolution of 6.9 arcmin for the Q, V, and W frequency bands.