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Fig. 8.


Top panel: sky distribution of the sources belonging to group B5, b (brown empty squares), group B5 (brown dots), and all the sources in the Belt region defined in the text (grey dots). The orange stars mark the position of σ Ori, ζ Ori, ϵ Ori, η Ori, and δ Ori. Bottom panels: distribution in 3D galactic co-ordinates of group B5, b (brown squares), and of all the sources belonging to the Belt region (grey dots).

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