A Superbubble Feedback Model for Galaxy Simulations

Understand

We present a new stellar feedback model that reproduces superbubbles.

• Superbubbles from clustered young stars evolve quite differently to individual supernovae and are substantially more efficient at generating gas motions.
• The essential new components of the model are thermal conduction, sub-grid evaporation and a sub-grid multi-phase treatment for cases where the simulation mass resolution is insufficient to model the early stages of the superbubble.
• The multi-phase stage is short compared to superbubble lifetimes.