Extended Data Fig. 3: Testing possible contributions of artefacts to the observed peak offset and to the orbital plane angle.

a, Intensity peak offset (top graph) and orbital plane angle (bottom graph) at each radial distance derived from the observed 0.9-mm image (filled circles) and that derived from the model (solid lines) using the original synthesized beam. b, As a but with the original beam and the tapered round-beam to show the effect of beam elongation. c, Intensity peak offset and orbital plane angle at each radial distance derived from the pseudo-observations of the disk model with warp (open circles) and without warp (crosses) for the tapered round-beam case. d, As c but for the original synthesized-beam (elongated beam) case. In a–d, the grey error bars represent 3σ Gaussian fitting errors.