¹²CO (J = 2−1) moment maps smoothed at a resolution of 2.57′. The circular beam in the left corner of each panel shows the Gaussian kernel used for smoothing the data. Magenta segments show the POS magnetic field orientation as traced by optical dust polarization. A scale segment is shown in the upper left corner in each panel. Pixels with a total CO intensity lower than 1.1 (K km s⁻¹) have been masked out. The dotted black rectangle defines the boundaries of region I, and the solid polygon defines region II. The black labels (I, II) are the region identifiers. Top left panel: Intensity (zero-moment) map of CO. Upper right panel: Intensity profiles along the white line shown in the I₀ map. The left vertical axis corresponds to the CO (J = 2−1) integrated intensity. The right vertical axis corresponds to the dust intensity of the three Herschel bands of the SPIRE instrument. The wavelength of each band is shown in the legend. The quasiperiodicity of the CO intensity fluctuations is prominent across this line. The wavelength of the pattern is ~1 pc. Dust intensity profiles are more complex than the CO profile, showing several subparsec features. Bottom left panel: Centroid velocity (I₁, first moment) map of CO. Right panel: Velocity dispersion of CO ( square root of the second-moment map).