Left: map of the integrated intensity between  −5 and 15 km s^-1 of the ¹³CO 2 → 1 line observed at the IRAM 30 m telescope (lower contour at 90 K km s^-1 and steps of 10 K km s^-1, from Pilleri et al. 2012). The three observed positions, IF, MP1, MP2, are indicated. The beam of the 30 m at 3 mm towards the three observed positions is also drawn. Right: IRAC 8 μm map towards Mon2. The extended emission is produced by the PAH bands at 7.7 μm. This figure shows the existence of an extended PDR in the cloud.