HD125162 (λ Boo) SMA modelling results. Left to right panels: SMA image (contours at intervals of 2x the RMS noise level of 0.12 mJy beam⁻¹), full resolution best-fit model image of the belt, residual image after subtraction of best-fit visibilities, and real and imaginary parts of the azimuthally averaged complex visibility profiles, for both the data and the best-fit model. The best-fit model belt’s inclination and position angle, largely unconstrained by the SMA data, were fixed to the Herschel results of Booth et al. (2013). The belt width, also unconstrained by the model, was fixed to 80 au.