Gamma Ray Burst Central Engines

Details Gamma Ray Burst Central Engines Gamma Ray Burst Central Engines

2008-07-04

arxiv.org/abs/0807.0747v1

Astronomy and Astrophysics

Astrophysics

6 pages; proceedings for "Gamma-Ray Bursts 2007," Santa Fe, New Mexico, November 5-9; edited by M. Galassi, D. Palmer, and E.

Scientific paper

10.1063/1.2943493

I review aspects of the theory of long-duration gamma-ray burst (GRB) central engines. I focus on the requirements of any model; these include the angular momentum of the progenitor, the power, Lorentz factor, asymmetry, and duration of the flow, and both the association and the non-association with bright supernovae. I compare and contrast the collapsar and millisecond proto-magnetar models in light of these requirements. The ability of the latter model to produce a flow with Lorentz factor ~100 while simultaneously maintaining a kinetic luminosity of ~10^50 ergs/s for a timescale of ~10-100 s is emphasized.

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