Fig. 1
Top panel: gravitational force, Fgra, for an M7 molecular cloud model with an outer radius of Rout = 5 pc, the two point-like cluster models C3 and C7 , and their combinations. Bottom panel: same combinations as the top panel for an M6 molecular cloud with an outer radius of Rout = 20 pc and a C6 cluster model with a 3D, Gaussian, spatial extension having FWHM of 1 or 4 pc .
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