ALMA ACA channel map of the CO 2–1 around IRAS 17163. The velocity of each channel is given in the top left; note the systemic velocity of the star is +18 km s^-1. The cool dust ring seen with Herschel is represented by a dashed circle with 25′′ radius, and the location of the star, at RA 17:19:49.33 Dec −39:10:37.94, is marked with a small cross. The restoring beam is shown as a white ellipse in the bottom left of the bottom left image. The common color scale is shown on the bottom right image. The figure continues on the next page.