Comparison of the observational contrast limits for the polarized surface brightness (black crosses and dotted line) with the disk model calculations. (A) Comparison with cuts through the dust disk with i = 60° for the intrinsic (dashed line) and convolved (full line) models for the narrow ring (orange) and broad ring (red) models. (B) Annuli comparison of the convolved dust models (dash dotted line) with respect to the averaged Q_ϕ and U_ϕ observations. (C) Surface brightness comparison between ε Eri and a prominent protoplanetary disk such as HD169142 together with the intensity PSF profile of ε Eri.