How bad could it be? Modelling the 3D complexity of the polarised dust signal using moment expansion

Open Access

Fig. 3.

Two proxies of the dust complexity: decorrelation $Δ_{ℓ}^{BB} (353 \times 217)$ $\Delta ^{BB}_\ell (353\times 217)$ (left) and the E-to-B ratio r^E/B (right). Values are plotted for the d12 original map (black crosses) and its representation by a pivot modified blackbody (blue), a moment expansion up to first order (orange) and up to second order (green).

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