Summary of the structure of IRAS 23033+5951. The fragmentation into four cores in two groups is depicted by the black spheres. Circumstellar rotation is indicated by arrows and the inferred outflow lobes are indicated by blue and red cones. The masses of the cores MMS1a–c and 2a are 23.5, 10.0, 1.2, and 11.4 M⊙. The three high-mass cores show evidence to be in more and more evolved stages, going from south to north.
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