High-velocity SiO(2–1) emission. The gray scale and contours show the 3.6 mm continuum emission, as in Fig. 3. The red and blue contours show high-velocity SiO(2–1) emission with redshifted gas between 84 and 92 km s⁻¹ and blueshifted gas between 68 and 76 km s⁻¹, both in relative contour levels from 15 to 95% of the integrated peak emission in 10% steps. A linear scale bar and the continuum synthesized beam are shown as well.