Fig. 18

Input radial velocity profile (top row) and modelled SiO (middle and bottom rows) spectra of two nearly identical models, except that for the model on the left there is only one large-scale velocity variation close to the radio continuum, while for the model on the right there is an additional strong velocity variation near 1.8 × 1014 cm = 109 mas ~ 5 R⋆.
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