Position-velocity (p-υ) diagrams for the ¹²CO emission towards the field of Kes 17. (a) Regions numbered from 1 to 7 that were used to construct the p-υ diagrams for the eastern cloud associated with Kes 17, shown in panels b–h. The colours indicate the spatial distribution of the ¹²CO J =1–0 gas integrated in the (−31, −14) km s⁻¹ velocity range as in Fig. 2, and the contours trace the 843 MHz radio continuum emission from Kes 17. (b–h) p-υ diagrams derived from the ¹²CO line emission depicted in panel a. They were constructed by integrating in the 100″ RA interval indicated by the regions numbered from 1 to 7 in panel a. The horizontal dashed lines mark the extent of Kes 17 in the declination dimension. The colour representation is the same for all p-υ diagrams.