Same as Fig. C.4 for IRAM04191. Open symbols are used when the visibility real part has a negative value (since absolute values are shown in the log-log plot). The red Plummer + Gaussian (PG) model that includes an unresolved 0.17′′ -FWHM Gaussian component (see Table 6) is only statistically better than the black Plummer-only (Pl) model at 231 GHz. The 94 GHz profile can be well modeled with a Plummer-only model. The oscillations of the models are due to the Hankel transform of the power-law envelope model with a low index (p + q = 1.4).
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