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From: Stefan Lieb  lieb@usm.uni-muenchen.de 
To: gcnews@zia.aoc.nrao.edu
Subject: submit 2004A&A...419..161L

%astro-ph/0402595

\documentstyle{article}
\begin{document}
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\title{In situ acceleration in the Galactic Center Arc}
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\author{S. Lieb, H. Lesch \and G.T. Birk}
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\abstract{For the nonthermal radio emission of the Galactic Center Arc
	in situ electron acceleration is imperative. The observed radio
	spectrum can be modeled by a transport equation for the relativistic
	electrons which includes particle acceleration by electric fields,
	momentum diffusion via scattering by magnetohydrodynamical
	turbulence and energy losses by synchrotron radiation. The
	accelerating electric fields can be regarded as a natural
	consequence of multiple reconnection events, caused by the
	interaction between a molecular cloud and the Arc region. The radio
	spectrum and even the recently detected 150 GHz emission,
	explicitely originating from the interaction regions of a molecular
	cloud with the magnetized Arc, can be explained in terms of
	quasi-monoenergetically distributed relativistic electrons with a
	typical energy of about 10 GeV accelerated in stochastically
	distributed magnetic reconnection zones.
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\end{document}