Fig. 6

Time evolution of the simulation with Σ0 = 30 M⊙ pc−2 and speed of sound cs = 10 km s−1, as an example of weak accretion with central shocks. Top: simulation showing a steady accretion rate of 10−3⋯−2 M⊙ yr−1. Bottom: firstfragmentation occurring around 100 pc and inside the nuclear ring at 800 pc. Later onthe inner fragmentation fades and a rather eccentric ring and inner shocks form at 80 pc.
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