Rotational temperature maps derived by CH₃CCH (6-5) and (5–4) lines. The left and right panel show the temperatures from the two-component LTE models separately. In the left panel, the contours represent integrated intensity map of CH₃CCH 5₂ – l₂ line. The velocity range for integration is 80–100 km s^–1, and the contour levels are from 1.0 K km s^–1 (5 σ) to 2 K km s^–1 (0.3 times peak emission value of MM2) with five uniform intervals. In the right panel, the contours represent the 3 mm continuum emission and are logarithmically spaced from 2σ_v (σ_v = 1.6 mJy beam^–1) to 225.0 mJy beam^–1 with five intervals (same as Fig. 2). In both plots, the cyan crosses indicate the position of the peak intensity of 3 mm emission.