Gamma-ray Bursts, Classified Physically

Details Gamma-ray Bursts, Classified Physically Gamma-ray Bursts, Classified Physically

2008-04-07

arxiv.org/abs/0804.0965v1

AIP Conf.Proc.1000:11-15,2008

Astronomy and Astrophysics

Astrophysics

6 pages, 3 figures. Slightly expanded version of solicited paper to be published in the Proceedings of ''Gamma Ray Bursts 2007

Scientific paper

10.1063/1.2943423

From Galactic binary sources, to extragalactic magnetized neutron stars, to long-duration GRBs without associated supernovae, the types of sources we now believe capable of producing bursts of gamma-rays continues to grow apace. With this emergent diversity comes the recognition that the traditional (and newly formulated) high-energy observables used for identifying sub-classes does not provide an adequate one-to-one mapping to progenitors. The popular classification of some > 100 sec duration GRBs as ``short bursts'' is not only an unpalatable retronym and syntactically oxymoronic but highlights the difficultly of using what was once a purely phenomenological classification to encode our understanding of the physics that gives rise to the events. Here we propose a physically based classification scheme designed to coexist with the phenomenological system already in place and argue for its utility and necessity.

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