¹²CO J = 3−2 spectra toward the region of S129. The region where the spectra were taken is shown superimposed on the Spitzer-IRAC 5.8 μm emission. The color scale goes from 10 MJy sr⁻¹ (violet) to 60 MJy sr⁻¹ (white). The black contours represent the submillimeter continuum emission at 850 μm as extracted from the SCUBA survey. The levels are at 40, 70, 100, 120, 180, and 250 mJy beam⁻¹.