Fig. 8
Comparison of the observed half light radii measured on ALMA maps (González-López et al. 2017) and HST F140W/WFC3 images. Assuming that the magnifications are similar at 1.1 mm and 1.6 μm, more than half of the ALMA-FFs DSFGs show dust emission which is signficantly more compact than the stellar activity probed by HST, while the rest exhibit comparable extents.
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