Astronomy and Astrophysics – Astrophysics
Scientific paper
2001-06-29
Physics of Plasmas, Volume 6, Issue 11, November 1999, pp.4318-4327
Astronomy and Astrophysics
Astrophysics
11 pages, 21 figures
Scientific paper
Magnetic Reconnection is an efficient and fast acceleration mechanism by means of direct electric field acceleration parallel to the magnetic field. Thus, acceleration of particles in reconnection regions is a very important topic in plasma astrophysics. This paper shows that the conventional analytical models and numerical test particle investigations can be misleading concerning the energy distribution of the accelerated particles, since they oversimplify the electric field structure by the assumption that the field is homogeneous. These investigations of the acceleration of charged test particles are extended by considering three-dimensional field configurations characterized by localized field-aligned electric fields. Moreover, effects of radiative losses are discussed. The comparison between homogeneous and inhomogeneous electric field acceleration in reconnection regions shows dramatic differences concerning both, the maximum particle energy and the form of the energy distribution.
Birk Guido Thorsten
Lesch Harald
Schopper Rüdiger
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