C¹⁸O 1–0 blueshifted and redshifted emissions in a) Cha I North, b) Cha I Centre, and c) Cha III Centre overlaid on the 870 μm dust continuum maps of Cha I and III (Belloche et al. 2011a,b). The C¹⁸O 1−0 data are from Haikala et al. (2005) for Cha I and Gahm et al. (2002) for Cha III. The continuum contour levels (black) correspond to a, 2a, 4a, 8a, 16a, 32a, with a = 48 mJy/21″-beam (4σ) for a) and b), while a = 34.5 mJy/21″-beam (3σ) for c). The blueshifted (subscript b) and redshifted (subscript r) C¹⁸O 1−0 contours correspond to the levels a) 3σ_b (3σ_r), 4σ_b (4σ_r), 5σ_b (5σ_r) with σ_b = 0.17 K km s^-1 and σ_r = 0.3 K km s^-1, b) 3σ_b (3σ_r), 4.5σ_b (5σ_r) with σ_b = 0.33 K km s^-1 and σ_r = 0.22 K km s^-1, and c) 4σ_b (4σ_r), 6σ_b (6σ_r), 8σ_b with σ_b = 0.08 K km s^-1 and σ_r = 0.09 K km s^-1. The velocity ranges for the blueshifted and redshifted integrated intensity emissions are v_b = 3.5 − 4.3 km s^-1 and v_r = 4.3−5.5 km s^-1 for a), v_b = 3.8 − 4.8 km s^-1 and v_r = 4.8−6.0 km s^-1 for b), and v_b = 0.5 − 1.5 km s^-1 and v_r = 1.5−2.5 km s^-1 for c). The white dots show the location of the continuum cores in each region. The sources with spectra displayed in Fig. 1 are highlighted with a box around their name.