Comparison between the observed 454 GHz continuum map (panel a) and two 3D models (A and B) based on our fiducial model. In model A (panel b, with τ₄₅₄ in panel e), the core component is assumed to be a real physical component concentrated at the center of the galaxy, and in model B (panel c, with τ₄₅₄ in panel f), the core component is assumed to be widespread in the inner disk. Panel d compares the solid angle subtended by the plotted contours (5, 10, 20, 40, 60, and 80 mJy beam⁻¹) in the observed map (black line and symbols) and in models A and B (red and green, respectively). Model A fits the observed map better than model B.