Thompson 2008 伽玛暴中心能源机制

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Title:		Gamma Ray Burst Central Engines
Authors:		Thompson, Todd A.
Affiliation:		Department of Astronomy & Center for Cosmology & Astro-Particle Physics, The Ohio State University 140 W. 18th Avenue, Columbus, Ohio 43210-1173thompsonatastronomy.ohio-state.edu thompsonatastronomy.ohio-state.edu
Publication:		GAMMA-RAY BURSTS 2007: Proceedings of the Santa Fe Conference. AIP Conference Proceedings, Volume 1000, pp. 399-404 (2008). (AIPC Homepage)
Publication Date:		05/2008
Origin:		AIP
Keywords:		gamma-ray sources (astronomical), black holes, neutron stars
Abstract Copyright:		(c) 2008: American Institute of Physics
DOI:		10.1063/1.2943493
Bibliographic Code:		2008AIPC.1000..399T

Abstract

I review aspects of the theory of long-duration gamma-ray burst (GRB) central engines. I focus on 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 ~10⁵⁰ ergs s^-1 for a timescale of ~10-100 s is emphasized.

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