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Fig. A.1.


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Continuum image gallery of the sources in our sample, shown with an asinh stretch. The beam size is indicated with a white ellipse in the lower-left corner. A bar in the top right indicates the 30 au scale. The top row shows the sources without C2H detection (mostly compact disks), followed by the disks with C2H detection: first the ring disks, followed by the transition disks, sorted by decreasing stellar luminosity.

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