Left panel: The color scale shows the peak intensity of the N₂H⁺ components associated with tree G, and the white contour shows the mask (corresponding to T _peak > 2.5 K) used to identify the filament studied in Section 3.2. The black contours show the continuum emission at 1.34 mm, at levels [0.5,1.0,1.7,2.5,4.2,5.9] mJy beam⁻¹ (from Sanhueza et al. 2019). The red box indicates the position of the zoomed area shown in the right panel. Right panel: V _lsr map of tree G within the white contour of the left panel, with CO emission overlaid in contours (from Li et al. 2020). The contours are computed in the velocity indicated in the bottom-right corner, at levels: for the blue component, [1.08, 1.62, 2.16, 2.7 , 3.78, 4.32, 4.86] Jy beam⁻¹ km s⁻¹; for the red component, [1.33, 1.995, 2.66, 3.99, 5.32, 6.65, 9.31, 10.64, 11.97] Jy beam⁻¹ km s⁻¹. The positions of protostars p2 and p3 are shown with yellow stars in both panels.