(a) Continuum map at 232 GHz in logarithmic scale. White dotted contours show the 5, 10, 30, and 200σ levels (σ = 50 μJy beam⁻¹). The white dashed line shows the disk major axis at PA = 25.7°. (b) Continuum intensity profiles: cut along PA = 25.7° (in black) and deprojected and azimuthally averaged (in red). The tapered power law central component and the two Gaussian components, derived from the fitting and before beam convolution, are shown in blue dashed and dotted lines, respectively. Bottom panel: fit residuals and ±5σ limit (dotted lines). (c) Position-velocity diagram in ¹³CO along PA = 25.7° in a pseudo-slit of 4″ width. The 3σ contour is shown in black. The curves show maximum expected line-of-sight velocities V_max for three different models: a thin disk in Keplerian rotation around M_⋆ = 1.1 M_⊙ at an inclination of i = 63° (red dashed line), pure rotation with constant angular momentum V_max ∝ 1/r (blue dotted line), and a rotating and infalling bipolar shell (see Sect. 3.2.2) with Rd = 300 au, θ₀ = 70° at an inclination of i = 63° (green solid line).