Fig. 18
Toomre Q ≈ Ωcs∕(πGΣ) parameter evaluated within one (orange) and three (green) times the disk scale heights. The same snapshots are taken as in Fig. 4. The disk is very stable against self-gravitating fragmentation. The difference between the two curves mainly arises because the total mass is not taken into account for the value within H and 3H.
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