Left: stellar line-of-sight velocity obtained by fitting the region around the CO band heads at 2.3 μm. Middle: rotating disc model fitted to the stellar velocity field. Right: residual between LOSV and model. The residual shows sub-structures that are indicated with white boxes. The cross denotes the peak of the K-band continuum emission, the black dashed lines show the line of nodes and the zero-velocity line of the model.