Fig. 6
PV-diagrams of a) IRS 63 and b) IRS 43 and the corresponding best fit models c) and d). The black points and error bars in a) and b) are the channel-by-channel Gaussian fit to the (u,v)-flux. The red curves are not Keplerian rotation, but rather the best fit velocity field as given by Eq. (5). The PV-diagrams a) and b) are taken along the grey line shown in Fig. 1.
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