CMB map derived from the WMAP data through Harmonic Internal Linear Combination

Understand

We are presenting an Internal Linear Combination (ILC) CMB map, in which the foreground is reduced through harmonic variance minimization.

• We have derived our method by converting a general form of pixel-space approach into spherical harmonic space, maintaining full correspondence.
• By working in spherical harmonic space, spatial variability of linear weights is incorporated in a self-contained manner and our linear weights are continuous functions of position over the entire sky.
• The full correspondence to pixel-space approach enables straightforward physical interpretation on our approach.