A Universal Central Engine Hypothesis for Short and Long GRBs

Details A Universal Central Engine Hypothesis for Short and Long GRBs A Universal Central Engine Hypothesis for Short and Long GRBs

2008-10-16

arxiv.org/abs/0810.3013v1

Astrophys.J.Lett.690:L61-L64,2009

Astronomy and Astrophysics

Astrophysics

3 figures, one with two panels

Scientific paper

10.1088/0004-637X/690/1/L61

It is noted that X-ray tails (XRTs) of short, hard $\gamma$-ray bursts (SHBs) are similar to X-ray flashes (XRFs). We suggest a universal central engine hypothesis, as a way of accounting for this curiosity, in which SHBs differ from long $\gamma$-ray bursts (GRBs) in prompt emission because of the differences in the host star and attendant differences in the environment they present to the compact central engine (as opposed to differences in the central engine itself). Observational constraints and implications are discussed, especially for confirming putative detections of gravitational waves from merging compact objects.

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