Integrated intensity map of [C ii] (in color) overlayed with CO(11−10) and C91α contours in black and white respectively. For CO(11−10) the contours drawn are at 3, 5, 8, 10, 12, 15, 20, 22, 24, 26 times the value of σ = 1.3 K km s^-1. For C91α contours are drawn at 5%, 20%, 30%, 45%, 50% to 100% in steps of 10% of the peak intensity of 7.3 × 10^-3 Jy/beam. The star symbol marks the position of HD 37903.