Gamma-ray bursts: Restarting the Engine
Andrew King, Paul T. O'Brien, Michael R. Goad, Julian Osborne, Emma Olsson, Kim Page
Abstract
Recent gamma-ray burst observations have revealed late-time, highly energetic events which deviate from the simplest expectations of the standard fireball picture. Instead they may indicate that the central engine is active or restarted at late times. We suggest that fragmentation and subsequent accretion during the collapse of a rapidly rotating stellar core offers a natural mechanism for this.
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