Gruzinov 2008 企图第一性原理数值计算出伽玛暴中磁场产生

主要内容:
给出了大致方法，应该是还没有结果。认为2D的模拟肯定产生不了磁场，必须3D.

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文章信息:

· arXiv e-print (arXiv:0803.1182)

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Title:		GRB: magnetic fields, cosmic rays, and emission from first principles?
Authors:		Gruzinov, Andrei
Publication:		eprint arXiv:0803.1182
Publication Date:		03/2008
Origin:		ARXIV
Keywords:		Astrophysics
Comment:		5 pages
Bibliographic Code:		2008arXiv0803.1182G

Abstract

We describe a scenario for large-scale magnetic field generation and particle acceleration in a collisionless collision of cold plasma clouds. A first-principle (i.e. using particles) numerical simulation of this process might be possible. Our scenario is essentially 3D. We argue that {\it large-scale} magnetic fields are not generated in 2D, even in collisionless plasma. We calculate and numerically simulate magnetic field generation by relativistic collisionless Kelvin-Helmholtz instability in 2D. Collisionless tangential discontinuity might be more important than collisionless shock, because tangential discontinuity remains unstable even in the hydro limit, when the shock stabilizes.

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