Fig. 1
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N2H+ (1−0) integrated intensity maps of the seven star-forming regions in the EMERGE Early ALMA Survey at 4.5″ resolution with ALMA+IRAM-30 m. In all panels, cyan triangles are the protostellar objects from Megeath et al. (2012); Stutz et al. (2013); Furlan et al. (2016), while the yellow and white stars are the O-B stars collected from Simbad (Wenger et al. 2000), respectively.
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