Upper panels: ¹³CO(3–2) integrated intensity map (left, contour spacing 0.01 Jy beam⁻¹ km s⁻¹ (3σ) with zero level omitted) and velocity map (right). Lower panels: C¹⁸O(3–2) integrated intensity map (left, contour spacing 0.01 Jy beam⁻¹ km s⁻¹, 2σ) and velocity map (right).The beams are indicated in lower left corner in each intensity map. The contour level spacing in the velocity maps is 0.5 km s⁻¹. The continuum has been subtracted. The white ellipses indicate the inner and outer edges of the dust ring.