a) Redshifted ¹²CO J = 6−5 emission (left panel) at the 15 km s^-1 channel (ΔV = 1 km s^-1) and the blueshifted ¹²CO emission (right panel) at the 3 km s^-1 channel (ΔV = 1 km s^-1) overlaid with the SMA ¹²CO J = 2−1 bullets taken from Zapata et al. (2009). The ¹²CO J = 6−5 emission is plotted in dark red and dark blue contours running from 8 to 48 K km s^-1 in steps of 4 k km s^-1 (1σ), and the contours with intensities higher than 48 K km s^-1 were skipped for clarity. The redshifted (from  +40 to  +120 km s^-1) and blueshifted (from –30 to –110 km s^-1) ¹²CO J = 2−1 emission peaks at different velocities are plotted as red and blue dots. The squares represent the positions of the outflow explosion center and the H₂ emission peak 1 and 2. The triangles represent the positions of the Orion HC (south) and BN (north). The stars mark the positions of the five Trapezium stars (θ¹ Ori A, B, C, D, and E). The positions of the H₂ emission peak 1 and 2 are marked as squares. Note that the emission in the southwest of the Trapezium stars comes from the OMC-1S region. b) ¹²CO J = 6−5 (black) and J = 7−6 (red) spectra toward Orion BN (upper panel) and the HC (lower panel). Dashed lines indicate the integrated velocity ranges shown in Figs. 2 and 3.