CO(J = 3–2) intensity image integrated over the velocity range V_LSR = 32.8–36.8 km s⁻¹ (red) and the H₂ column density image (green), which was derived in subsection 3.1 by SED fitting of the Herschel archival data (160, 250, 350, and |$500\, \mu$|m). This CO feature with a peak velocity of ∼35 km s⁻¹ is ∼14 km s⁻¹ redshifted from the central velocity of the M 17 SWex cloud of ∼21 km s⁻¹, and the distributions of this feature and the M 17 SWex cloud are in good agreement. This positional agreement may not be along the line of sight by chance. (Color online)