Fig. C.1
Example of the FilFinder application to a pair of velocity channel maps in THOR-HI. Left: intensity map at the indicated line-of-sight velocity. Middle: map of the eigenvalue λ− obtained with a 120′ FWHM derivative kernel. This map is used as a mask for FilFinder. Right: FilFinder filaments overlaid on the respective HI intensity map smoothed to 120′ FWHM.
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