Integrated intensity ratio maps. (a) Integrated intensity ratio map of CO/¹³CO(1–0). The ratios are taken in K km s⁻¹ units, and remain the same in the following integrated intensity ratio plots. The black contour is drawn at 15 and the blue contour at 21. The gray arrows point to the outflow in the SE and NW directions. (b) Integrated intensity ratio map of HCN/¹³CO(1–0). The black contour is drawn at 1.4 and the blue contour at 2. (c) Integrated intensity ratio map of HCN/CO(1–0). The solid black line marks the major axis. The black contour is drawn at 0.09 and the blue contour at 0.15. The white contour is drawn at a CO/¹³CO(1–0) ratio of 15. The orange, purple, and yellow stars mark the positions at −1.5″, −4″, and −6.5″ offsets along the SW slice. The labels 3, 6, and 7 mark three GMCs. The gray arrows point to the outflow in the SE and NW directions.