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Fig. 4

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Line width (top), velocity (middle), and peak intensity (bottom) residuals computed for the 12CO disc of MWC 480, as in Fig. 3, but deprojected on the disc reference frame. The vertical axis in this frame is parallel to the projected minor axis on the sky. The solid lines mark the radial location of millimetre dust rings, and the purple dotted line that of the most prominent kink identified by eye in 12CO channels. Also shown is the north-sky (or PA = 0°) axis for reference. The oblique shape of this axis is due to the deprojected geometry of the disc emission surface.

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