The diffusive Galactic GeV/TeV gamma-ray background:: Sources vs. transport

被引：0
|
作者：
Völk, HJ [1 ]
机构：
[1] Max Planck Inst Kernphys, D-69029 Heidelberg, Germany
来源：
GEV-TEV GAMMA RAY ASTROPHYSICS WORKSHOP | 2000年 / 515卷
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中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The diffuse Galactic gamma-ray background, as observed with EGRET on CGRO, exceeds the model predictions significantly above 1 GeV. This is particularly true for the inner Galaxy. We shall discuss here the contribution of the Galactic Cosmic Ray (GCR) sources, considered as unresolved, and in addition the possibility that the transport of the GCRs out of the Galaxy is not uniform over the Galactic disk. In both cases the spectrum of the diffuse gamma raysis harder than the GCR spectrum in the neighborhood of the Solar system, as observed in situ. The source contribution is a necessary and, as it turns out, significant part of the diffuse background, whereas the transport effect is one of several conceivable additional causes for the hard diffuse gamma-ray spectrum observed.
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页码：281 / 287
页数：7
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