IS THE GALACTIC COSMIC-RAY SPECTRUM CONSTANT IN TIME?

被引：4
|
作者：
Eichler, David [1 ]
Kumar, Rahul [1 ]
Pohl, Martin [2 ,3 ]
机构：
[1] Ben Gurion Univ Negev, Dept Phys, IL-84105 Beer Sheva, Israel
[2] Univ Potsdam, Inst Phys & Astron, D-14476 Potsdam, Germany
[3] DESY, D-15738 Zeuthen, Germany
来源：
ASTROPHYSICAL JOURNAL | 2013年 / 769卷 / 02期
基金：
以色列科学基金会;
关键词：
cosmic rays; ACCELERATION; ANISOTROPY; EARTH;
D O I：
10.1088/0004-637X/769/2/138
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The hypothesis is considered that the present, local Galactic cosmic-ray spectrum is, due to source intermittency, softer than average over time and over the Galaxy. Measurements of muogenic nuclides underground could provide an independent measurement of the time-averaged spectrum. Source intermittency could also account for the surprising low anisotropy reported by the IceCube Collaboration. Predictions for Galactic emission of ultrahigh-energy (UHE) quanta, such as UHE gamma rays and neutrinos, might be higher or lower than previously estimated.
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页数：4
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