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Generation of Large Scale Electric Fields in Coronal Flare Circuits  

Hakan Onel   Submitted: 2012-07-19 02:27

A large number of energetic electrons are generated during solar flares. They carry a substantial part of the flare released energy but how these electrons are created is not fully understood yet. This paper suggests that plasma motion in an active region in the photosphere is the source of large electric currents. These currents can be described by macroscopic circuits. Under special circumstances currents can establish in the corona along magnetic field lines. The energy released by these currents when moderate assumptions for the local conditions are made, is found be comparable to the flare energy.

Authors: Onel. H.; Mann, G.
Projects: None

Publication Status: Cent. Eur. Astropys. Bull. 33 (2009), 1, 141-154
Last Modified: 2012-07-19 11:53
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Subject will be restored when possible  

Hakan Onel   Submitted: 2007-12-10 05:35

AIMS: The electron transport is investigated numerically after an electron transport model is deduced. METHODS: This model for electron propagation considers global electric and magnetic fields, as well as local Coulomb collisions. A new way to handle the electron's pitch angle evolution by using a binary dice within the treatment of the Coulomb scattering is introduced. The conditions in the solar plasma are represented by average and commonly used models, such that numerical simulations can be performed easily. RESULTS: The model for electron propagation finally obtained makes it possible to investigate how the Coulomb collisions act on the pitch angle, while electrons are transported through the solar plasma. Some chosen numerical results for different initial conditions are presented in the paper.

Authors: Onel, H.; Mann, G.; Sedlmayr, E.;
Projects: None

Publication Status: Published in A&A 463, 1143?1152 (2007).
Last Modified: 2007-12-10 11:18
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Propagation of energetic electrons through the solar corona and the interplanetary medium  

Hakan Onel   Submitted: 2007-12-10 05:35

AIMS: The electron transport is investigated numerically after an electron transport model is deduced. METHODS: This model for electron propagation considers global electric and magnetic fields, as well as local Coulomb collisions. A new way to handle the electron's pitch angle evolution by using a binary dice within the treatment of the Coulomb scattering is introduced. The conditions in the solar plasma are represented by average and commonly used models, such that numerical simulations can be performed easily. RESULTS: The model for electron propagation finally obtained makes it possible to investigate how the Coulomb collisions act on the pitch angle, while electrons are transported through the solar plasma. Some chosen numerical results for different initial conditions are presented in the paper.

Authors: ?nel, H.; Mann, G.; Sedlmayr, E.;
Projects:

Publication Status: Published in A&A 463, 1143-1152 (2007).
Last Modified: 2012-07-19 02:06
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Generation of Large Scale Electric Fields in Coronal Flare Circuits
Subject will be restored when possible
Propagation of energetic electrons through the solar corona and the interplanetary medium

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