Dust temperature map (grayscale) and CO 1–0 map (blue contours) for the gas components at the distance of 5.6 kpc. The dust temperature distribution is limited to the central region, covered by the Herschel EPoS key program (Sect. 2.4 and Fig. E.1) and, therefore, does not cover the south-east feature. The CO contours start at 2.7 K km s¹ (5) and are drawn in steps of 2.7 K km s¹; the range of CO integrated intensities is shown on Fig. 7. The positions of YSOs, as classified via CCD/ML methods (Sects. 3.2 and 3.3), are shown in circles (Class I) and × symbols (Class II).