Left: IRAM PdBI cleaned map of the CO(1–0) blue- and red-shifted wings of IRAS 23365+3604, integrated within (±300, ±600) km s^-1 and combined together. Contour levels correspond to 1σ (1σ rms level is 0.15 mJy beam^-1). Right: real part of visibilities as a function of the uv radius for the combined CO(1–0) wings; visibilities are binned in baseline steps of 50 m. The red curve is the best fit with a circular Gaussian model.