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Fig. 1


a)Spitzer 4.5 μm image (in logarithmic scale) of the star forming region G35.200.74 N, overlaid with a contour map of the 870 μm (350 GHz) continuum emission obtained with ALMA. The IR image has been obtained by applying HiRes deconvolution (Velusamy et al. 2008) to the Spitzer/IRAC data. The submillimeter map has been corrected for primary beam attenuation. Contours start at 5σ, increasing in steps of 6σ (with σ = 1.8 mJy beam-1), up to a maximum level of 201.7 mJy beam-1. The dashed white circle denotes the primary beam of the ALMA 12 m antennas (~9′′), while the ALMA synthesized beam (, PA = 46°) is shown in the bottom-right corner of the panel. b) Close-up of the central region that shows the 870 μm continuum emission map obtained with ALMA. Six cores (from A to F) have been identified and marked in the image (see Table 2). Yellow crosses mark the position of OH masers (Hutawarakorn & Cohen 1999). The ALMA synthesized beam is shown in the bottom-right corner of the panel. The spatial scale is also indicated in both panels.

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