Radial profile μ_T(ϖ) derived from the stacked temperature image (see Fig. 41 or 45). The denominators σ₀ and σ₂ are the theoretical rms values of CMB T and ∇²T, respectively. The theoretical ⟨ μ_T(ϖ) ⟩ is a linear combination of ⟨ T(ϖ)(T(0) /σ₀) ⟩ (green dash-dotted line) and ⟨ T(ϖ)(−∇²T(0)) /σ₂) ⟩ (blue dotted line). For all four component-separated maps, the deviation of μ_T from the ensemble mean ⟨ μ_T ⟩ of the fiducial model (here the Planck 2015 ΛCDM best fit) is consistent with cosmic variance, and can be related to the low-ℓ power deficit. The example power-deficit ⟨ μ_T ⟩ (purple dashed line) is the theoretical prediction of ⟨ μ_T ⟩ if the fiducial model C_ℓs are reduced by 10% in the range 2 ≤ ℓ ≤ 50.