Radio Diagnostics of the Solar Flare Reconnection |
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Authors: | Marian Karlický Miroslav Bárta |
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Institution: | (1) Astronomical Institute of the Academy of Sciences of the Czech Republic, CZ-25165 Ondřejov, Czech Republic |
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Abstract: | First, high-frequency (HF) slowly drifting pulsating structures are interpreted as radio emissions of electron beams accelerated
in the magnetic reconnection volume and injected into magnetic islands (plasmoids). Then, the time evolution of plasma parameters
(density, magnetic field, etc.) in a 2-D MHD model of solar flare reconnection is computed numerically. Assuming plasma radio
emission from locations where the “double-resonance’’ instability generates upper-hybrid (UH) waves due to unstable distribution
function of suprathermal electrons, the radio spectra and spatial source structures in the reconnection region are modeled.
By comparison of the modeled and observed spectra a remarkable similarity has been found between the computed narrow-band
emission and the observed lace bursts. Finally, a new diagnostics of the reconnection process is proposed. |
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Keywords: | solar flare magnetic reconnection radio radiation |
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