Fig. 1

Three-colour image of the SVS 4 cluster overlaid with SCUBA-2 850 μm density flux in mJy beam−1 (Herczeg et al. 2017). The contours are in decreasing steps of 10% starting at 3120 mJy beam−1. The composite is made from Spitzer IRAC 3.6 μm (blue), 8.0 μm (green), and MIPS 24.0 μm (red) bands (Fazio et al. 2004). The dark orange crosses mark the position of the SVS 4 sources, and the white star represents SMM 4.
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