Moment-0 maps (top panels) of H₂CO 3_1,2 − 2_1,1 (left), CS 5−4 (middle), and CN 2−1 (right; blending of the three components at 226.87 GHz reported in Table 1) towards DG Tau. The corresponding moment-1 maps are shown in the bottom left and middle panels, while no moment-1 map is shown for CN 2− 1 because of the blending of the three hyperfine components. Bottom right panel: map of the continuum emission at 1.3 mm. The color scale indicates the line intensity in mJy beam⁻¹km s⁻¹ (moment-0),the velocity V_LSR in km s⁻¹ (moment-1), and the intensity in mJy beam⁻¹ (for the continuum map). The black contours indicate the 1.3 mm dust continuum emission (0.01% corresponding to the 5σ level, 10, 30,50, 70, and 90% contours). The ellipse in the bottom left corner of each panel shows the ALMA synthesized beam.