Fig. 14
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The [O I] 557 nm/[O I] 630 nm ratio observed in the NLVC with no velocity-shifted peak is plotted against the estimated [O I] 630 nm emission radius assuming Keplerian rotation. Green symbols indicate TD sources. The dashed line represents the linear fit through the points, whose analytical expression is indicated in the figure. The Pearson correlation coefficient is also displayed in the bottom right of the figure.
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