On the shape of the ultrahigh energy cosmic ray spectrum

被引：34
|
作者：
De Marco, D [1 ]
Stanev, T [1 ]
机构：
[1] Univ Delaware, Bartol Res Inst, Newark, DE 19716 USA
来源：
PHYSICAL REVIEW D | 2005年 / 72卷 / 08期
关键词：
D O I：
10.1103/PhysRevD.72.081301
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We fit the ultrahigh energy cosmic ray spectra above 10(19) eV with different injection spectra at cosmic ray sources that are uniformly and homogeneously distributed in the Universe. We conclude that the current ultrahigh energy spectra are consistent with power laws of index alpha between 2.4 and 2.7. There is a slow dependence of these indices on the cosmological evolution of the cosmic ray sources, which in this model determines the end of the galactic cosmic rays spectrum.
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页数：5
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