Fig. 29.
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Integrated H I emission (moment 0) contours overlaid on a DECaLS r-band image. Contours begin at 2σ (solid black lines) and each subsequent contour is a factor of two greater. The dashed black contours indicate −2σ. The VLA synthesised beam is shown as a black ellipse in the bottom left and a 20 kpc scale bar is in the bottom right.
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