Open Access
Fig. 8

Deprojected and rotated (top panels) as well as polar-deprojected (bottom panels) velocity residuals of 12 CO with overlaid Archimedean and logarithmic spirals. The spiral SpT2 observed in TB is overlaid as a grey dashed line. The residuals inside a radius of 1.5 times the FWHM of the beam are masked out.
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