Fig. A.1.

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3D illustration of the two criteria used to define the protostar, as applied in run IMHD (first column) and run NIMHD (second column). The first row displays an isocontour of XH2 ≈ 10−1, whereas the second row displays an isocontour of ρ ≈ 10−5 g cm−3. The colorbar in the first (resp. second) row displays the gas density (resp. XH2) in the extracted surface.
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