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Fig. 2

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Geometry of the transition disk model. Panel a Sketch of the rotationally symmetric, inclined disk model with inclination i, wall slope χ, and angular height of the disk wall a. Panel b Corresponding vertical disk cross-section with the midplane disk distance to the star r and the height h for the surface point S (r, h), and radii r0 and rw for the inner radius and the rim radius of the wall, respectively. Emitted photons from the star are characterized by the angular direction ϑ, while θ0 and θ are the polar incidence and emergence angles from surface point S for the special case of scattering in the principal plane.

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