Cosmic Ray propagation in the Galaxy and diffuse gamma-ray emission

被引：0

作者：

Evoli, Carmelo ^{[1
]}

Gaggero, Daniele ^{[2
]}

Grasso, Dario ^{[3
]}

Maccione, Luca ^{[1
]}

机构：

[1] SISSA, Via Beirut 2-4, I-34014 Trieste, Italy

[2] Univ Pisa, Dipartimento Fis E Fermi, I-56127 Pisa, Italy

[3] INFN, I-56127 Pisa, Italy

来源：

HIGH ENERGY GAMMA-RAY ASTRONOMY | 2009年 / 1085卷

关键词：

Cosmic Rays diffusion propagation gamma diffuse emission Galaxy; ANTIPROTON SPECTRUM; ABUNDANCES; SECONDARY; ROTATION;

D O I：

暂无

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We model the propagation of galactic cosmic-ray nuclei with energy above 1 GeV using DRAGON, a new numerical code. We test our code by considering the case of a uniform diffusion coefficient D along the Galactic Plane. Then, for the first time, we also study the case in which D traces the radial distribution of Galactic Supernova Remnants. In both cases we consistently match the observed B/C, as well as other primary/primary nuclide ratios, and the antiproton/proton spectrum. Moreover, we compute the hadronic contribution to the diffuse gamma-ray emission of the Galaxy along the galactic plane, and we point out that the radial dependence of the diffusion coefficient may offer an alternative solution to the well-known gradient problem.

引用

页码：380 / +

页数：2

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