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Mon. Not. R. Astron. Soc. 378, 10191030 (2007) doi:10.1111/j.1365-2966.2007.11834.x Particle distributions and X-ray spectra in single or multiple solar
 

Summary: Mon. Not. R. Astron. Soc. 378, 10191030 (2007) doi:10.1111/j.1365-2966.2007.11834.x
Particle distributions and X-ray spectra in single or multiple solar
current sheets
C. Gontikakis,1
A. Anastasiadis2
and C. Efthymiopoulos1
1Research Centre for Astronomy and Applied Mathematics, Academy of Athens, Soranou Efessiou 4, 115 27 Athens, Greece
2National Observatory of Athens, Institute for Space Applications & Remote Sensing, 15236 Palaia Penteli, Greece
Accepted 2007 April 5. Received 2007 April 3; in original form 2007 February 22
ABSTRACT
The acceleration of charged particles in a site of magnetic reconnection is analysed by detailed
numerical simulations. Single or multiple encounters of the particles with Harris-type recon-
necting current sheets (RCSs) are modelled as an overall stochastic process taking place within
an active region. RCS physical parameters are selected in a parameter space relevant to solar
flares. Initially, the charged particles form a thermal (Maxwellian) distribution corresponding
to coronal temperature 2 106
K. Our main goal is to investigate how the acceleration pro-
cess changes the shape of the particles' kinetic energy distribution. The evolution of the kinetic
energy distribution, calculated numerically after one encounter of the particles with a single
RCS, is found to be in good agreement with our previously published analytical formulae. In

  

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

 

Collections: Physics