OPTICAL AND RADIO SPECTRAL ANALYSIS OF A RECURRENT SURGE |
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Authors: | KOTRČ PAVEL SCHMIEDER BRIGITTE KARLICKÝ MARIAN HEINZEL PETR |
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Affiliation: | (1) Astronomical Institute, Academy of Sciences of the Czech Republic, CZ-251 65 Ondejov, Czech Republic;(2) Section de Meudon, Observatoire de Paris, F-92195 Meudon Principal Cedex, France |
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Abstract: | Coordinated observations obtained at Meudon (MSDP) and at Ondejov provide surge spectra in optical range (H, H, H, Hµ, Ca H and K lines) and in radio range. The MSDP data allowed us to follow the time evolution of the surge. The spectra of Balmer lines were used to derive the electron density of the expelled cool material. The radio bursts indicate that the acceleration of electrons took place in the low and dense atmosphere, giving a good argument for a reconnection near the transition region. |
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