Fig. 9

Left panel: DSS2 red image of the brightest nebulosity in RCW 173, and the emerging cluster Alicante 6. Right panel: Spitzer/GLIMPSE 5.8 μm image of the same area. The red circle shows the O7 II star a805, which we identify as the ionising source, and its mid-infrared counterpart (G025.2465+00.3011). The blue square marks the position of A514 and its bright GLIMPSE counterpart (G025.2977+00.3105), for reference.
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