Extragalactic sources for ultrahigh energy cosmic ray nuclei

被引：17

作者：

Anchordoqui, L ^{[1
]}

Goldberg, H ^{[1
]}

Reucroft, S ^{[1
]}

Swain, J ^{[1
]}

机构：

[1] Northeastern Univ, Dept Phys, Boston, MA 02115 USA

来源：

PHYSICAL REVIEW D | 2001年 / 64卷 / 12期

关键词：

D O I：

10.1103/PhysRevD.64.123004

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

In this article we examine the hypothesis that the highest energy cosmic rays are complex nuclei from extragalactic sources. Under reasonable physical assumptions, we show that the nearby metally rich starburst galaxies (M82 and NGC 253) can produce all the events observed above the ankle. This requires diffusion of particles below 10(20) eV in extragalactic magnetic fields B approximate to 15 nG. Above 10(19) eV, the model predicts the presence of significant fluxes of medium mass and heavy nuclei with small rate of change of composition. Notwithstanding, the most salient feature of the starburst-hypothesis is a slight anisotropy induced by iron debris just before the spectrum cutoff.

引用

页数：6

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