Variance of dust temperature and spectral index in Planck polarization data using spin-moment expansion

Open Access

Fig. 5

Test of predictions P2, P3, and P4: dependence on the observed polarization fraction p₀ = P₀/I₀ at 353 GHz of the variances Re c^P, c^P, c^ψ, and c^ε computed at 217 GHz. Our models for c^ε (P2) and c^ψ (P3) are overplotted as dotted orange and red lines, respectively, using the mean value of the slope derived from these equations, multiplied by $⟨ P_{0}^{2} ⟩$ $\[\left\langle P_{0}^{2}\right\rangle\]$ and $⟨ I_{0}^{2} ⟩$ $\[\left\langle I_{0}^{2}\right\rangle\]$ in each bin of p₀ = P₀/I₀.

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