Simon Portegies Zwart, Chang-Hwan Lee, Hyun Kyu Lee
Published 1998-08-19, updated 1999-02-27Version 2
We present a phenomenological model to explain the light curves of gamma-ray bursts. In the model a black hole is orbited by a precessing accretion disc which is fed by a neutron star. Gamma-rays are produced in a highly collimated beam via the Blandford-Znajek mechanism. The gamma-ray beam sweeps through space due to the precession of the slaved accretion disc. The light curve expected from such a precessing luminosity cone can explain the complex temporal behavior of observed bright gamma-ray bursts.
Comments: Apj in press: 25 pages, 16 figures
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