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Fig. 6


Extinction map (Av) for distances between 1.7 and 2.2 kpc. The extinction values range from  ~0.37 mag (black pixels) to  ~1.86 mag (white pixels). Each number is the velocity of a source. The colours correspond to: black: sources most probably associated with Sh2-86 (2.1 kpc), red: near distance (~3 kpc), but not associated with Sh2-86, white: objects with negative velocity (no distance ambiguity,  ~13.5 kpc) or velocity close to 0 km s-1 (far distance favoured,  ~9.5 kpc), Blue: objects with forbidden velocity; tangent distance adopted (~4.3 kpc), and green: far distance (~6 kpc).

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