Fig. 4.
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SagDIG H II region emission line maps. The left panel shows the Hβ emission line distribution. The right panel shows the [O III]λ5007 emission line distribution. The colour map represents the flux at each emission line. The dashed grey lines indicate circles of increasing radius of 1.34″ (2 px) up to 12.06″ (18 px). The dotted black lines show the angles that separate the S clump, the NE tail, and the NW clump.
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