Fig. 1

Original continuum-subtracted Hα intensity maps used in this study: the LMC on the left (from the SHASSA survey; Gaustad et al. 2001) and M 33 on the right (Hoopes & Walterbos 2000), cropped in the case of the LMC but otherwise unaltered. North is up and east is left. The black scale bar corresponds to 2 deg (~1.7 kpc) in the LMC and 20 arcmin (~4.9 kpc) in M 33.
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