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Fig. B.1

image

Disc models for NGC 5291N (top), NGC 5291S (middle), and NGC 5291SW (bottom) adopting the parameters from B07. Left panels: total H I  maps from the observed cube (solid contours) and the model cube (dashed ellipse). The cross and dashed line illustrate the kinematical centre and major axis, respectively. The circle to the bottom-left corner shows the H I  beam. Right panels: PV diagrams along the major axis obtained from the observed cube, model cube, and residual cube. Solid contours range from 2σ to 8σ in steps of 1σ. Dashed contours range from 2σ to 4σ in steps of 1σ. The horizontal and vertical lines correspond to the systemic velocity and dynamical centre, respectively.

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