Left: position–velocity diagram from our maps of ¹²CO J = 2–1 in R Sct along the direction PA = 0°, corresponding to the nebula equator. The contour spacing is logarithmic: ± 25, 50, 100, 200, 400, 800, and 1600 mJy beam⁻¹ with a maximum emission peak of 2.4 Jy beam⁻¹. The dashedlines show the approximate central position and systemic velocity. Right: same as in left but along the perpendicular direction PA = 90°.