Giannios, Dimitrios 2010 相对论喷流中产生超高能宇宙射线

主要内容:
根据一阶费米加速机制，在磁重连的情况下可以产生高达1e20eV的宇宙线。

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Title:		UHECRs from magnetic reconnection in relativistic jets
Authors:		Giannios, Dimitrios
Publication:		eprint arXiv:1007.1522
Publication Date:		07/2010
Origin:		ARXIV
Keywords:		Astrophysics - High Energy Astrophysical Phenomena
Comment:		5 pages, 2 figures, MNRAS Letters, in press, Sect. 3.3 added to match the published version
Bibliographic Code:		2010arXiv1007.1522G

Abstract

Ultra-high energy cosmic rays (UHECRs) may be produced in active galactic nuclei (AGN) or gamma-ray burst (GRB) jets. I argue that magnetic reconnection in jets can accelerate UHECRs rather independently of physical processes in the magnetic dissipation region. First order Fermi acceleration can efficiently take place in the region where the unreconnected (upstream) magnetized fluid converges into the reconnection layer. I find that protons can reach energies up to E~10^{20} eV in GRB and powerful AGN jets while iron nuclei can reach similar energies in AGN jets of more moderate luminosity.

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