PV diagram of the 12CO emission along the disk PA (see black arrow in Fig. 2, bottom left). Contour star at 32 mJy/beam with 32 mJy/beam steps. The plot is superimposed with expected Keplerian motions in a disk inclined by 80° for a central object of 1, 2, and 3 M⊙ (internal, central, and external curves respectively).
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