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Fig. A.1.

image

1.21 mm continuum emission of AFGL 4176 mm1-main in greyscale and contours (σ = 23 μJy beam−1 × −5, 5, 7, 10, 12, 16, 20, 25, 50, 100). The beam is shown in the bottom left corner (0.034″ × 0.028″, PA = −33.5°), and a scalebar is in the right corner. Two ellipses with semi-major axes of 1000 au or ∼0.24″ are shown, one with a semi-minor axis of 0.15″ (solid red, corresponding to i = 51°) and the other with a semi-minor axis of 0.22″ (dashed blue, corresponding to i = 30°).

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