Fig. 2
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Critical metallicity threshold for filament formation, Zcrit, with respect to Stokes number for gas removal times of 50 and 100 orbits. With red we show the critical metallicity values measured by Carrera et al. (2015) and Yang et al. (2017) for comparison. These values are somewhat lower due to differences in initial conditions, resolution and in the definitions of the start of filament formation.
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