Temporal evolution of the chromospheric electron density in the flare of January 5, 1992 |
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Authors: | E Rolli A Magun |
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Institution: | (1) Institute of Applied Physics, University of Berne, Berne, Switzerland |
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Abstract: | The analysis of the dynamic evolution of the chromospheric electron density during solar flares is fundamental for the testing of solar flare models. For this purpose we developed a digital imaging spectrograph for the observation of higher Balmer lines below 400 nm with a time resolution of 1 s and an algorithm for the determination of the electron density from the observed line profiles. On January 5, 1992 a M1/1N flare was observed in H , H and Caii H and the temporal evolution of the electron density was determined. The chromospheric electron density rises several times from less than 3 × 1019 to 1 × 1020 m–3 during the hard X-ray peaks. |
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