Radial profile of the derived T values (in blue) used for calculating the thermal broadening component of the line width for CO (left), CN (centre) and CS and CN assuming co-spatiality (right). For CO and CN this is T_ex while for CS this is T_kin. The black line shows the upper limit T_kin that would fully account for the total line width in the absence of turbulent broadening. Outside 140 au, the derived T_kin exceeds for CN and is thus is not considered in further analysis. The black dots in the rightmost panel come from the CS line widths. Error bars show 1σ uncertainties on the mean.