ALMA ¹³CO J = 3−2 observations of the Red Rectangle. To better show the contribution of the various components, these maps were obtained using natural weighting in the image deconvolution and a velocity resolution of 0.66 km s^-1. The resulting beam size (HPBW) is 0.′′59 ×0.′′56 (shown in the insert). The contours are −0.01, 0.01, 0.03, 0.09, 0.27, and 0.81 Jy/beam (logarithmic spacing by a factor 3, equivalent to 0.34, 1.02, 3.06, 9.18, and 27.5 K). We note the large contrast between expanding gas emission and the peak of the equatorial disk brightness, almost by a factor 100. The HST optical image is also shown. As in most maps shown in this paper, we subtracted the continuum.