Hemispherical Power Asymmetry in the Third-Year <i>Wilkinson Microwave Anisotropy Probe</i> Sky Maps
Hemispherical Power Asymmetry in the Third-Year <i>Wilkinson Microwave Anisotropy Probe</i> Sky Maps
We consider the issue of hemispherical power asymmetry in the third-year WMAP data, adopting a previously introduced modulation framework. Computing both frequentist probabilities and Bayesian evidences, we find that the model consisting of an isotropic CMB sky modulated by a dipole field gives a substantially better fit to the observations …