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Fig. 2.


Density distribution of the sources in Orion for different Z values. The orange stars indicate the positions of (from top to bottom in each panel): λ Ori, 25 Ori, ϵ Ori, and the Orion Nebula cluster. The white solid contours represent the 0.4, 0.5, 0.6 and 0.8 density levels (the density is normalised to have values from 0 to 1). The Sun is located at (X, Y) = (0, 0).

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