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THE ASTROPHYSICAL JOURNAL, 489:367374, 1997 November 1 1997. The American Astronomical Society. All rights reserved. Printed in U.S.A.(
 

Summary: THE ASTROPHYSICAL JOURNAL, 489:367»374, 1997 November 1
1997. The American Astronomical Society. All rights reserved. Printed in U.S.A.(
ELECTRON ACCELERATION BY RANDOM DC ELECTRIC FIELDS
ANASTASIOS LOUKAS AND MANOLIS K.ANASTASIADIS, VLAHOS, GEORGOULIS
Section of Astrophysics, Astronomy, and Mechanics, Department of Physics, University of Thessaloniki,
GR-54006 Thessaloniki, Greece
Received 1996 November 11; accepted 1997 June 12
ABSTRACT
We present a global model for the acceleration of electrons in the framework of the statistical —are
model of Vlahos et al. In this model, solar —ares are the result of an internal self-organized critical (SOC)
process in a complex, evolving, and highly inhomogeneous active region. The acceleration of electrons is
due to localized DC electric –elds closely related to the energy-release process in the active region. Our
numerical results for the kinetic energy distribution of accelerated electrons show a power-law or an
exponential-law behavior, depending on the maximum trapping time of the energetic particles inside the
acceleration volume.
Subject headings: acceleration of particles » Sun: —ares
1. INTRODUCTION
It has been documented that the energy released during
solar —ares is separated into three parts: (1) intense localized
heating, (2) particle acceleration, and (3) mass —ows. It is

  

Source: Anastasiadis, Anastasios - Institute for Space Applications and Remote Sensing, National Observatory of Athens

 

Collections: Physics