Granot 2010 伽马暴的喷流

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Title:		Jets and Gamma-Ray Burst Unification Schemes
Authors:		Granot, Jonathan; Ramirez-Ruiz, Enrico
Publication:		eprint arXiv:1012.5101
Publication Date:		12/2010
Origin:		ARXIV
Keywords:		Astrophysics - High Energy Astrophysical Phenomena
Comment:		46 pages, 12 figures; book chapter, to appear in "Gamma-ray Bursts" (CUP)
Bibliographic Code:		2010arXiv1012.5101G

Abstract

There are several lines of evidence indicating that the ultra-relativistic outflows powering gamma-ray bursts (GRBs) are collimated into narrow jets. However, these are indirect, and the jet structure is rather poorly constrained. What is more, the jet dynamics have still not been investigated in detail. It has been suggested that the observed variety between different long duration events, ranging from bright spectrally hard GRBs, to dimmer and spectrally softer X-ray flashes (XRFs) may be largely due to different viewing angles (or lines of sight) relative to rather similar relativistic jets. Here we describe the current state of knowledge on these topics, explain some of the most relevant physics behind some of the basic principles, and discuss prospects for the future.

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