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gcnews,tex, J.Phys,G: Nucl.Part.Phys., arXiv: 0705.2333
Date: Fri, 25 May 2007 17:01:40 +0400
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Attached is LaTeX file of our submission.
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Attached is LaTeX file of our=20
submission.
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\documentclass[jphysg,12pt]{article}=0A=
\usepackage{graphicx}=0A=
\usepackage{epsfig}=0A=
\textwidth=3D16cm=0A=
\textheight=3D22cm=0A=
=0A=
\begin{document}=0A=
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\baselineskip 20pt plus .1pt minus .1pt=0A=
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\rightline {}=0A=
\vskip 1.0cm=0A=
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=0A=
\begin{center}=0A=
{\Large {\bf Gamma Rays from the Galactic Centre}}=0A=
\end{center}=0A=
\begin{center}=0A=
A.D.Erlykin $^{1,2}$, A.W.Wolfendale $^2$=0A=
\end{center}=0A=
=0A=
\begin{center}=0A=
\small (1) P. N. Lebedev Physical Institute, Moscow, Russia\\=0A=
(2) Department of Physics, University of Durham, Durham, UK=0A=
\end{center}=0A=
=0A=
\begin{abstract}=0A=
Recent results from the HESS gamma ray telescope have shown the presence =
of=0A=
both a diffuse, extended, flux of gamma rays above $\sim$0.4 TeV and=0A=
discrete sources in and near the Galactic Centre. Here, we put=0A=
forward a possible explanation in terms of the diffusion of cosmic=0A=
ray protons from a succession of supernova remnants (~SNR~) in the =0A=
SgrA* region of the Galaxy plus a contribution from SNR in the=0A=
rest of the Galactic Centre Region, to be called the Galactic Centre=0A=
Ridge (~GCR~). Protons are favoured over electrons because the $mG$=0A=
magnetic fields in the Region will attenuate energetic electrons =
severely. =0A=
=0A=
Prominent features are the need for 'anomalous diffusion' of the=0A=
protons in the whole region and the adoption of low efficiency for=0A=
SNR acceleration in the high density regions. The latter is related=0A=
by us to the well-known low 'cosmic ray gradient' in the Galaxy.=0A=
=0A=
A corroborating feature is the close correlation of inferred cosmic ray=0A=
intensity with the smoothed intensity of 5 GHz radio radiation. We=0A=
attribute this to the presence of the SNR in the GCR. =0A=
\end{abstract}=0A=
=0A=
\end{document}=0A=
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