Distribution of (left) the centroid velocities, μ, and (right) FWHM of He I λ5877 NC (open circles) and BC (open triangles) of the BEK01 sample with respect to their mass estimates, with BC colour-coded with respect to centroid velocities in the right panel. The NC and BC measurements of Delorme 1 (AB)b from this work are shown as filled red and green data points in the figure. The inset in the bottom panel zooms in along the FWHM-axis of NC distribution of the CTTS sample. The linear fit to the BC distribution is shown as a green line, along with its 1σ confidence interval (shaded green region). Measurements from different observations of the same source are joined by dashed black lines in both plots.