Violation of the Greisen-Zatsepin-Kuzmin cutoff:: A tempest in a (magnetic) teapot?: Why cosmic ray energies above 1020 eV may not require new physics

被引：81

作者：

Farrar, GR ^{[1
]}

Piran, T ^{[1
]}

机构：

[1] NYU, Dept Phys, New York, NY 10003 USA

来源：

PHYSICAL REVIEW LETTERS | 2000年 / 84卷 / 16期

关键词：

D O I：

10.1103/PhysRevLett.84.3527

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The apparent lack of suitable astrophysical sources for the observed highest energy cosmic rays within approximate to 20 Mpc is the "Greisen-Zatsepiri-Kuzmin (GZK) paradox." We constrain representative models of the extragalactic magnetic field structure by Faraday rotation measurements; limits are at the mu G level rather than the nG level usually assumed. In such fields, even the highest energy cosmic rays experience large deflections. This allows nearby active galactic nuclei (possibly quiet today) or gamma ray bursts to be the source of ultrahigh energy cosmic rays without contradicting the GZK distance limit.

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页码：3527 / 3530

页数：4

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