Fig. 1
Relative collisional step size (Eq. (3)) as a function of time for an example simulation (f* = 10, X = 0.5 and Mc = 6.54 × 1019 kg). Each point represents a collision recorded in this collapsing-cloud simulation. The logarithmic colour scale, mrel = log(m∕m0)∕log(Mc∕m0), shows the mass of the primary (most massive) particle that is involved in each collision.
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