a) Continuum-subtracted integrated intensity of ¹²CO J = 6−5 in color. The black contour lines show 5σ,10σ,20σ,... detections of the line (1σ = 73 mJy beam^-1 km s^-1), white contour lines represent 5σ,10σ,100σ,200σ,300σ detections of the continuum (1σ = 0.82 mJy beam^-1). The ALMA beam (FWHM) is indicated in the lower left corner. b) Deprojected continuum-subtracted integrated intensity maps of ¹²CO J = 6−5 in color and continuum with red contour (5σ,10σ,100σ,200σ,300σ detections). The (x,y)-coordinates are along the major/minor axis of the observed disk. Thick white lines indicate radii of 20 and 60 AU and deprojected isovelocity contours of regions with velocity ± 1, ± 2,... km s^-1 relative to v_lsr towards us. The yellow shaded region indicates positions affected by foreground absorption.