2D distribution of vturb for all three lines: CO (left), CN (centre), and the combination of CN and CS assuming co-spatiality, therefore sharing the same Tex and vturb values (right). The values are masked outside 180 au and within 40 au. The beam size is shown in the bottom left corner for each line, and the major and minor axes are denoted by the central cross, aligned with the x- and y-axes, respectively. At the distance of TW Hya, 1″ ≈ 54 au. The azimuthal asymmetry see in the inner disk is an artefact of a purely radial subtraction of the beam-smearing component discussed in Sect. 3.2.
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