Surface mass density rendered image of the fragmenting disc with initial surface mass density profile Σ∝R⁻¹. The simulation (Reference-beta5.5) used β = 5.5. The fragment forms in the outer regions of the disc, confirming the analytical predictions in Section 2. The colour scale is a logarithmic scale ranging from log Σ=− 6 (dark) to −3 (light) M_⊙ au⁻².