Left: position–velocity diagram from our NOEMA maps of ¹²CO J = 2–1 in 89 Her along the direction PA = 150°, corresponding to the nebula equator. The contour spacing is logarithmic: ± 70, 140, 280, and 560 mJy beam⁻¹ with a maximum emission peak of 870 mJy beam⁻¹. The dashed lines show the approximate central position and systemic velocity. The beam is represented in the last panel. Right: same as in left but along PA = 60°.