Summary of the various ¹²CO(2-1) kinematical components in DG Tau B: the inner conical flow (integrated from (V − V_sys) = +2.15 to +8 km s⁻¹) is shown in purple to yellow shades (floor at 26 mJy beam⁻¹ km s⁻¹). The individual low-velocity ¹²CO(2-1) channel maps at (V − V_sys) = 1.19 km s⁻¹ (resp. −1.03 km s⁻¹) are shown in red (resp. blue) shades (floor at 3σ with σ = 2 mJy beam⁻¹). Inside the white contours, the ¹³CO(2-1) channel maps are shown at (V − V_sys) = 1.45 km s⁻¹ in red and (V − V_sys) = − 1.55 km s⁻¹ in blue, highlighting the upper and lower disk surfaces (floor at 3σ with σ = 5 mJy beam⁻¹).