Fig. 1

ALMA Band 7 images of all the observed sources, as labelled in each panel; each panel is 3′′ × 3′′ in size. The synthesized beam full width at half maximum is shown in the lower left corner of each panel; the typical size is . In each panel, contour levels are plot at −3σ (dashed), and every 3σ from 3σ to the maximum.
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