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This article has an erratum: [https://doi.org/10.1051/0004-6361/201935633e]


Fig. A.1.

image

Panel a: PV diagram for SiO (5-4) emission taken using the same cut PA and width as for the H2O presented in Fig.2b, a 5 pixel-wide slice along the dashed line at PA = 25.9°. The resolution is shown at the bottom right as the beam major axis (30 mas) and the velocity resolution (0.8 km s−1). The inner structure from −50 to +50 mas overlaps that of the H2O emission, although we see emission extend past ±50 mas (110 au) at low velocities (cf. Maud et al. 2018). Panel b: same as (a), but showing the PV diagram for the H30α radio-recombination line. The resolution is shown at the bottom right, representing the 20 mas beam major axis and a 1.3 km s−1 velocity resolution. Although tentative, there appears to be a very slight shift in position of the H30α emission in the same rotation sense as the disc. It is possible that this traces very hot rotating inner material inward of the molecule line emission in the disc. In both panels the black contours of the data are plotted at the 20–80% levels in steps of 10%. The axis scales and velocity range are different.

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