Mathematics – Logic
Scientific paper
Aug 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996aipc..384..709w&link_type=abstract
Gamma-ray bursts: 3rd Huntsville symposium. AIP Conference Proceedings, Volume 384, pp. 709-718 (1996).
Mathematics
Logic
10
Gamma-Ray Sources, Gamma-Ray Bursts, Late Stages Of Stellar Evolution, Pulsations, Oscillations, And Stellar Seismology
Scientific paper
Several varieties of models for gamma-ray bursts are discussed with emphasis on neutron star quakes as a potential local model and very rapid accretion into a black hole as a cosmological model. Quakes could explain the soft repeaters and could potentially provide the energy required by classical bursts, but there are problems with energy storage and the production of a hard spectrum. The model favored by the author for common bursts is a black hole of 2 to 10 Msolar accreting ~0.1 Msolar s-1 from a disk. The disk may be a consequence of neutron star merger, black hole-neutron star merger, or a collapsar (a.k.a., ``failed supernova''). Merging neutron stars are not expected to produce a gamma-ray burst during their merger, but may set the stage for subsequent production by accretion. Bursts are beamed and that may tend to favor the collapsar model. There the burst would be produced by the interaction of a jet with the circumstellar (not interstellar) medium and that might allow the models to have smaller relativistic gamma's. Because of beaming, there may be many more soft, faint bursts than hard, bright ones. Because of continued accretion, bursts can last for hours.
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