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We simulate the collapse of isolated dwarf galaxies using SPH + N-Bodysimulations including a physically motivated description of the effects ofsupernova feedback. As the gas collapses and stars form, the supernova feedbackdisrupts enough gas to temporarily quench star formation. The gas flows outwardinto a hot halo, where it cools until star formation can continue once more andthe cycle repeats. The star formation histories of isolated Local Group dwarfgalaxies exhibit similar episodic bursts of star formation. We examine the massdependence of the stellar velocity dispersions and find that they are no lessthan half the velocity of the halos measured at the virial radius.

Breathing in Low Mass Galaxies: A Study of Episodic Star Formation