Similar to Figs. 1 and 3, except that the orbits are radial, thus preventing the formation of a stellar core (see the solid blue lines, which behave as r⁻² at small radii). The potential was assumed to be of the type Henon’s isochrone. (a) The DM expands a factor of 20, from r_iso = 0.5 to r_iso = 10. The polytropic index m is set to 5, and the cutoff radius of the initial stellar distribution to 10. The cutoff of the final stellar distribution is marked with a vertical dashed green line. (b) Same as (a) except for the initial cutoff, set to 100, and the polytropic index, set to 2. For further details, see the caption of Fig. 1.