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Fig. 8

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PV diagrams of CH3CN υ = 0 J = 12−11 K = 3 (a), CH3OH (b), SO2 (c), and SO (d) emission for the cut at the position of the velocity spike (see the dotted black circle in Figs. 2k and 1). The magenta curves represent the Keplerian disk model for the central mass of 15 M.

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