Seyfert galaxy NGC 7172. From top to bottom: Panel a: HST optical to near-IR composite RGB image of NGC 7172 retrieved from ESASky4.3.0. It combines observations from the Advanced Camera for Surveys (ACS) at 6060 and 8140 Å, and the Wide Field Camera 3 (WFC3) at 1.6 μm. The orientation of the image is north up, east to the left. The FoV is ≃2′ × 2′. The rectangle shows approximately the ALMA FoV, while the dashed lines represent the opening angle of the southern (brighter) side of the optical ionization cone. Image credit: ESA/Hubble & NASA, D. J. Rosario, A. Barth. Panel b: ALMA CO(3−2) intensity map (moment 0) produced with a 3σ clipping using the merged configuration observations. We trimmed the original FoV to approximately 17.6″ × 3.3″. Both the image and the contours are shown on a linear scale. The color bar shows the intensity scale in Jy km s⁻¹ per beam units. The first contour is at 0.05 Jy km s⁻¹ per beam. The ALMA beam (not shown) is 0.08″ × 0.07″ (14 pc × 13 pc) at PA_beam = 90.4°. Panel c: ALMA CO(3−2) mean velocity map (moment 1) produced with a 3σ clipping using the merged configuration observations. The contours are the isovelocities. Panel d: ALMA CO(3−2) mean velocity dispersion map (moment 2) produced with a 3σ clipping using the merged configuration observations. For the last two panels the scale bar units are km s⁻¹.